Child socioemotional behavior and adult temperament as predictors of physical activity and sedentary behavior in late adulthood

This is a self-archived version of an original article. This version may differ from the original in pagination and typographic details. Author(s): Title: Year: Version: Copyright: Rights: Rights url: Please cite the original version: CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ Child socioemotional behavior and adult temperament as predictors of physical activity and sedentary behavior in late adulthood © 2023 the Authors Published version Ahola, Johanna; Kokko, Katja; Pulkkinen, Lea; Kekäläinen, Tiia Ahola, J., Kokko, K., Pulkkinen, L., & Kekäläinen, T. (2023). Child socioemotional behavior and adult temperament as predictors of physical activity and sedentary behavior in late adulthood. BMC Public Health, 23, Article 1179. https://doi.org/10.1186/s12889-023-16110-y 2023 RESEARCH Open Access © The Author(s) 2023. 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The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data. Ahola et al. BMC Public Health (2023) 23:1179 https://doi.org/10.1186/s12889-023-16110-y BMC Public Health *Correspondence: Johanna Ahola [email protected] 1Gerontology Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, P.O. Box 35, Jyväskylä FI-40014, Finland 2Department of Psychology, University of Jyväskylä, Jyväskylä, Finland Abstract Background Most studies investigating the association of temperament with physical activity and sedentary behavior have examined children or adolescents, employed cross-sectional or longitudinal designs that do not extend from childhood into adulthood, and utilized self- or parent-reported data on physical activity and sedentary behavior. This longitudinal study investigated whether socioemotional behavior in childhood and temperament in middle adulthood predict accelerometer-measured physical activity and sedentary behavior in late adulthood. Methods This study was based on the Jyväskylä Longitudinal Study of Personality and Social Development (JYLS). Socioemotional behavior (behavioral activity, well-controlled behavior, negative emotionality) was assessed at age 8 based on teacher ratings, whereas temperament (surgency, effortful control, negative affectivity, orienting sensitivity) was assessed at age 42 based on self-rating. Moderate-to-vigorous physical activity and sedentary behavior were assessed at age 61 using an accelerometer. Data (N = 142) were analyzed using linear regression analysis. Results In women, behavioral activity at age 8 predicted higher levels of daily sedentary behavior at age 61. The association did not remain statistically significant after controlling for participant’s occupational status. In addition, women’s negative affectivity at age 42 predicted lower daily moderate-to-vigorous physical activity at age 61, particularly during leisure time. No statistically significant results were observed in men. Conclusions Although few weak associations of socioemotional behavior and temperament with physical activity and sedentary behavior were detected in women, they were observed over several decades, and thus, deserve attention in future studies. In addition to other factors contributing to physical activity and sedentary behavior, health professionals may be sensitive to individual characteristics, such as a tendency to experience more negative emotions, when doing health counseling or planning for health-promoting interventions targeting physical activity and sedentary behavior. Keywords Personality, Accelerometer, Longitudinal study, Life-span development Child socioemotional behavior and adult temperament as predictors of physical activity and sedentary behavior in late adulthood Johanna Ahola1* , Katja Kokko1, Lea Pulkkinen2 and Tiia Kekäläinen1 Page 2 of 12Ahola et al. BMC Public Health (2023) 23:1179 Introduction Individuals leading a more physically active and less sedentary lifestyle have a lower risk of developing several non-communicable diseases (e.g., coronary heart disease and type 2 diabetes) and facing premature death [1, 2]. However, globally more than one in four adults do not engage in the World Health Organization’s recommended amount of physical activity (PA), namely, at least 150min of moderate PA, 75min of vigorous PA, or a combination of these two intensities per week [3], which has remarkable economic consequences [4]. Moreover, adults in high-income countries spend the major part of their waking time being sedentary [5], which further increases the economic burden [6]. PA involves any bodily movements produced by skeletal muscles, causing the energy expenditure to exceed the basal metabolic rate [7]. By contrast, sedentary behavior (SB) is any waking behavior that is performed in a sitting, reclining, or lying posture that requires low energy (≤ 1.5 metabolic equivalents) [8]. The behaviors are interrelated within a 24-hour activity cycle together with sleep, meaning that an increase in one activity results in a decrease in another [9]. However, PA and SB deserve to be investigated separately for two focal reasons. First, they are independent factors associated with several health-related outcomes, including all-cause mortality [1, 2], although PA may reduce the health risks caused by SB [9]. Second, SB may be commonly accumulated a lot even when the recommended amount of PA is met; thus, SB does not equate to physical inactivity [1]. In the 21st century, worrying trends in the levels of PA and SB have been observed, with the prevalence of physical inactivity and SB increasing in high-income countries [3, 10]. Nowadays, SB can be difficult to avoid owing to several perpetuating social and environmental factors, such as sedentary jobs [11] and less physically demanding domestic tasks [12] that have become more common. PA and SB can indeed occur in the leisure (e.g., exercise), occupational (e.g., manual labor tasks), transportation (e.g., active commuting), and domestic (e.g., housework) domains [13]. Although current recommendations do not take these domains into account, an increasing amount of literature suggests that while leisure-time PA is beneficial to health [14], occupational PA is related to adverse health outcomes (e.g., an increased risk of early mortality) [15]. Hence, information on the domain-spe- cific correlates of PA and SB are needed to develop targeted health-promoting interventions. Personality characteristics (e.g., socioemotional behavior and temperament) may explain inter-individual differences in the levels of PA and SB even after a long time, as they have been reported to predict multiple behaviors related to health [16] and work life [17] after decades. Socioemotional behavior and temperament describe the basic dispositions regarding one’s feelings, reactions, and efforts to regulate arising reactions and the concepts share the same understanding that individual differences arise from the interaction between reactivity and self-regulation [18, 19]. Specifically, Pulkkinen (originally Pitkänen [20]) defined socioemotional behavior as the expression and regulation of one’s emotions in social relationships and characterized it by three higher-order dimensions: behavioral activity, well-controlled behavior, and negative emotionality [18, 21]. Similarly, Rothbart et al. [19, p. 123] defined temperament a few decades later as the relatively persistent “individual differences in reactivity and self-regulation” and conceptualized it as having three higher-order dimensions in childhood: surgency, effortful control, and negative affectivity. These three dimensions are conceptual counterparts of each other [18]. Behavioral activity refers to one’s tendency to be actively in contact with others [18], while surgency refers to one’s tendency to show high activity, prefer high-intensity activities, and not feel uneasy in new social situations [19]. Well-controlled behavior refers to one’s tendency to act constructively and compliantly when facing a conflict [18], while effortful control refers to one’s tendency to regulate attention and behavior and prefer low-intensity activities [19]. Negative emotionality refers to one’s tendency to display both aggressive and anxious behaviors [18], while negative affectivity refers to one’s tendency to frequently experience feelings of sadness, discomfort, anger, and frustration [19]. Temperament in adulthood also includes the dimensions of orienting sensitivity and affiliativeness [22]. Orienting sensitivity refers to one’s tendency to sense cues from the external and internal environment, while affiliativeness refers to one’s tendency to respond empathetically to others’ feelings [22]. In previous studies, the links to PA and SB were examined using the concept of temperament. Studies investigating the associations of temperament with PA and SB used various measures and assigned different names to the temperament dimensions despite their similarities with existing ones [19], resulting in the difficulty of drawing definitive interpretations of the literature. Recent evidence, however, suggests that child surgency and related temperamental activity are associated with greater PA [23–26] and lower levels of SB in childhood [23, 27] as well as predict greater PA in adolescent boys [28]. However, child temperamental activity predicted lower PA and higher levels of SB in men within a followup period of over 20 years [26]. Negative affectivity is, in turn, linked to lower PA in boys [24], and a similar association was observed in men in the Jyväskylä Longitudinal Study of Personality and Social Development (JYLS) [29]. In a follow-up study related to Sharp et al. [24], this dimension predicted lower PA in girls and greater PA in Page 3 of 12Ahola et al. BMC Public Health (2023) 23:1179 boys [30]. Studies on child effortful control and related well-controlled behavior reported the most inconsistent results, wherein these dimensions were associated with lower PA and higher levels of SB in childhood [23] but predicted greater PA in women in the JYLS [16]. Orienting sensitivity is, in turn, linked to greater PA in adulthood [29]. Despite some conflicting findings, temperament has been suggested to be a relevant factor for PA and SB at different ages, and it may have predictive value for these behaviors over decades. However, the majority of the previous studies examined children [23–25, 27, 30] or adolescents [25, 28], employed cross-sectional [23, 24, 27] or longitudinal designs that do not extend from childhood into adulthood [28–30], and utilized self- or parent-reported data on PA and SB [16, 24, 26, 28–30]. The domains of PA and SB also varied across studies that focused either on the investigation of leisure time by using questionnaires [16, 24, 26, 28–30] or the assessment of non-domain-specific activities by using accelerometers [23, 25, 27]. Compared to questionnaires that tend to underestimate SB [5], accelerometers provide detailed information of intensity, frequency and duration of also habitual and incidental physical movements, which may be difficult to memorize [13]. None of the previous studies on the links between temperament and PA or SB used accelerometers to assess the PA and SB of adults and, simultaneously, several domains of PA and SB (e.g., leisure and occupational domains). This study aimed to fill the current research gaps, with the major objective of investigating whether socioemotional behavior in childhood (age 8) and temperament in middle adulthood (age 42) predict PA and SB in late adulthood (age 61). In particular, this study aimed to assess the associations of multiple dimensions of child socioemotional behavior and adult temperament with accelerometer-measured moderate-to-vigorous physical activity (MVPA) and SB. In addition to whole-day MVPA and SB, leisure and occupational domains were investigated. Having data on inter-individual differences from two phases of life enabled the investigation on whether MVPA and SB can already be predicted by personality characteristics in childhood or only in adulthood. On the basis of previous findings [23–26, 28–30], in this study, it was hypothesized that behavioral activity, surgency, and orienting sensitivity are associated with greater MVPA, whereas negative emotionality and negative affectivity are associated with lower MVPA. It was also hypothesized that these links exist from child socioemotional behavior into MVPA and SB in late adulthood but may be stronger when analyzed within adulthood in a shorter time interval. The literature on the association of well-controlled behavior and effortful control with PA [16, 23] and of all dimensions with SB [23, 26, 27] remains inconsistent. Setting unambiguous hypotheses is difficult because of these inconsistent findings based on various measures and because none of the previous studies followed their participants for five decades. This study aimed to supplement the previous studies based on the JYLS [16, 29] by extending the follow-up period to late adulthood (8–50 years old vs. 8–61 years old) and adopting a new method to assess PA (self-reporting vs. accelerometer-based measurement). Methods Study design and participants This study was based on the JYLS [21], particularly on its most recent data collection called TRAILS (Transitions at Age 60: Individuals Navigating Across the Lifespan) [31]. For the first data collection in 1968, the participants (initial N = 369, 53% males) were drawn from randomly selected second grade classes in schools located in the town center and suburban areas of Jyväskylä, Central Finland. The selection method enabled the gathering of a representative sample without initial attrition. All participants were native Finns, and nearly all (94%) were born in 1959 [21]. Data were collected in several major waves: at ages 8, 14, 27, 36, 42, 50, [21] and 61 years [31]. The current study used the longitudinal data collected in 1968, 2001, and 2020–2021 when the participants were aged 8, 42, and 61 years, respectively. The initial study plan to collect teacher ratings was approved by the local school authorities, and the adult participants agreed to participate each time by signing a written informed consent [21]. In 2001, the Ethical Committee of the Central Finland Health District approved the data collection (42/2000) [32], and in 2020–2021, the procedures were approved by the Ethical Committee of the University of Jyväskylä (12/13/2019) [31]. In the current study, data were obtained from teacher ratings, self-ratings, and accelerometer measurements. The accelerometer measurements were conducted amid the COVID-19 pandemic in 2020–2021 but not during the state of emergency in spring 2020. Finland had mild restrictions (e.g., no curfew), and possibilities for outdoor physical activities among 60-year-olds were favorable [33]. The study sample consisting of 42-year-olds represented the Finnish age cohort born in 1959 in terms of several demographic characteristics [32]. Those who remained in the study at age 61 were still representative of the same-age Finnish cohort [31]. The analytical sample in this study consisted of 142 participants who provided valid accelerometer data at age 61. Temperament data at age 42 were available for 131 of the 142 participants. Page 4 of 12Ahola et al. BMC Public Health (2023) 23:1179 Measures Child socioemotional behavior was assessed at age 8 using the teacher ratings on 36 items, from which 27 items were used to measure three dimensions: behavioral activity (3 items; e.g., “Always busy and plays eagerly with other children during breaks and after school hours”), well-controlled behavior (constructiveness, 4 items; compliance, 3 items; emotional stability, 1 item; e.g., “Tries to act reasonably even in annoying situations”), and negative emotionality (aggressiveness, 8 items; anxiety, 3 items; low self-control, 5 items; e.g., “Teases smaller and weaker peers when angry at something”) [18]. The teachers were instructed to observe their pupils during breaks and rate their typical behavior on a four-point scale, with 0 representing “does not apply at all to the pupil in question” and 3 representing “is very typical of the pupil in question”. The girls were rated in relation to other girls, and the boys were rated in relation to other boys. The mean score for each dimension was computed, and a higher mean score indicated a stronger reflection of the socioemotional dimension in question. The factor analysis of the original sample indicated good internal consistency in all dimensions (α = 0.77–0.91) [18]. Teacher ratings were shown to be a valid method in the assessment of inter-individual differences in children at age 8 when peer nominations were used as criteria [21]. Adult temperament was assessed at age 42 using a self-reporting instrument. The short version of the Adult Temperament Questionnaire comprised 77 items assessing four dimensions: surgency (sociability, 5 items; high intensity pleasure, 7 items; positive affect, 5 items), effortful control (activation control, 7 items; attentional control, 5 items; inhibitory control, 7 items), negative affectivity (fear, 7 items; frustration, 6 items; sadness, 7 items; discomfort, 6 items), and orienting sensitivity (neutral perceptual sensitivity, 5 items; affective perceptual sensitivity, 5 items; associative sensitivity, 5 items) [22]. The items were answered on a seven-point Likert scale, with 1 representing “extremely untrue of you” and 7 representing “extremely true of you”. The mean score for each dimension was computed, and a higher mean score indicated a stronger reflection of the temperament dimension in question. The factor analysis based on a larger sample indicated good internal consistency in all dimensions (α = 0.79–0.83) [18, 29]. MVPA and SB were measured at age 61 using a triaxial accelerometer (UKK RM42) (UKK Terveyspalvelut Oy, Tampere, Finland). In this study, SB refers to time spent in sedentary behaviors but also to time spent in standing without ambulation, since the body posture was not measured with the current method [8]. Accelerometers were offered to those participants interested in health examination (N = 179), and data were collected between March 2020 and May 2021. The timing of the assessment period was flexible and targeted for a usual week of their life (e.g., postponed due to a holiday or sick leave). The participants were instructed to wear the device on a hip-worn elastic belt during waking hours for seven consecutive days, except when engaging in waterrelated activities. The participants used a diary to report their waking hours, sleeping time, times of starting and finishing work, non-step-based activities (e.g., cycling and swimming), periods when the accelerometer was removed for longer than 30min and possible unusual events occurring during the week. The device and the diary were returned via mail. The accelerometer sampling rate was 100 samples per second (Hz). The mean amplitude deviation (MAD) was calculated from the raw acceleration data [34], and a custom-written script on MATLAB (version R2016b, The MathWorks Inc., Natick MA, USA) was used to produce an average of 60 s MADs from non-overlapping epochs of 5s. Intensity levels were defined as < 0.0167g for SB and ≥ 0.091g for MVPA [34, 35]. Non-wear time was defined as ≥ 120min of continuous MAD values of < 0.02g after the comparison of the analyzed wear times with diary-reported wear times on a sub-sample during the data collection (r = 0.83, N = 127). Among the 149 participants who agreed to wear the accelerometer, 142 provided valid data for at least four valid days defined as a minimum of 10h (600min) a day [36]. Compliance to wearing the device was high, with 82% of the participants providing valid data for seven days. Working hours were based on diary reports, and leisure time was calculated by subtracting the working time from the whole-day wear time. The mean daily minutes of MVPA and SB for a whole day (N = 142), during leisure time (leisure-time MVPA / SB, N = 141), and when at work (occupational MVPA / SB, N = 99) were used as the main variables. Accelerometer wear time, season, occupational status of parents and the participants, and self-rated health were used as background variables. The season of the accelerometer measurement period was dummy-coded to summer (June–August) and other months of the year. The occupation of the children’s parents (mainly based on the father’s occupation, with the exception of mothers who were the sole providers) or the adult participants was classified as either a blue-collar, a lower white-collar, or an upper white-collar job [16]. The occupations of the children’s parents at age 8 were reported by the children’s teachers, while the latest occupation of the participants at age 61 was self-reported. Occupation variables were dummy-coded by computing two variables (lower whitecollar jobs vs. others; upper white-collar jobs vs. others). Self-rated health was assessed using a single question: “What has your state of health been during the past year?” [37]. Self-rating was based on a five-point scale, Page 5 of 12Ahola et al. BMC Public Health (2023) 23:1179 with 1 representing “very good” and 5 representing “very poor”. A reversed variable was computed. All variables and measures used in the current study are seen in Fig.1. Statistical analyses All statistical analyses were performed using the IBM SPSS Statistics version 26. Previous studies based on the JYLS [29] and other datasets [26] have reported genderspecific results regarding the associations of temperament with PA and SB. Thus, statistical analyses were performed separately for women and men. The descriptive statistics are expressed as means and standard deviations for continuous variables and as percentages for categorical variables. In comparing the two genders in terms of the means of continuous variables, independent samples t-test was used, whereas differences in frequencies of categorical variables were tested with chi-square test. Pearson bivariate correlations were computed, and Fisher’s z-test was conducted to obtain the correlation differences between women and men. Linear regression analysis was used as the main statistical analysis to examine the associations between the main variables. Owing to the positively skewed distributions, square root transformations of whole-day MVPA and leisure-time MVPA and a cube root transformation of occupational MVPA were used in the analyses. Regression models were adjusted for accelerometer wear time, season, occupational status, and self-rated health. The models incorporating child socioemotional dimensions were adjusted for the parents’ occupational status and additionally for the participant’s own occupational status, whereas the models incorporating adult temperament dimensions were adjusted for the participant’s occupational status. For sensitivity purposes, additional linear regression models were produced by excluding those participants whose accelerometer measurement overlapped with the declared COVID-19-related state of emergency in Finland (March 16, 2020–June 16, 2020) (N = 11). The effect size of the standardized beta-coefficient was considered to be small when β = 0.10–0.29, medium when β = 0.30–0.49, and large when β ≥ 0.50 [38]. A p-value of < 0.05 indicated statistical significance. Additionally, analyses were corrected for multiple comparisons using the Benjamini–Hochberg method [39]. A false discovery rate of 0.10 was used to assess the significance of 20 gender comparisons in Table1. Similarly for the regression analyses, the significance of 12 p-values of childhood analysis (2 outcomes and 3 predictors by gender) in Table2, and 16p-values of adulthood analysis (2 outcomes and 4 predictors by gender) in Table3 were calculated separately for each model (Models 1, 2, and 3), including different sets of covariates. Results The descriptive statistics for all participants and for only the women and men are presented in Table1. As reported in previous JYLS publications that analyzed slightly different samples [18, 29], boys scored higher than girls for negative emotionality, while women scored higher than men for negative affectivity and orienting sensitivity. No gender-based differences were observed in terms of MVPA and SB. Among those who reported working hours (N = 99, 62% women), men spent more time at work than did women. The Pearson bivariate correlations for the main and background variables are presented in the Additional file 1 (Table S1). Based on the correlation matrix, in women, higher scores for negative affectivity correlated with lower whole-day MVPA (r = − 0.28) and leisuretime MVPA (r = − 0.27), while higher scores for surgency correlated with greater leisure-time MVPA (r = 0.28). In men, higher scores for effortful control and lower scores Fig. 1 Summary of the variables and measures used in the longitudinal study Page 6 of 12Ahola et al. BMC Public Health (2023) 23:1179 for negative affectivity correlated with higher levels of occupational SB (r = 0.38, r = − 0.42). Linear regression models were used to examine the associations of personality characteristics with wholeday MVPA and SB. In the analysis of child socioemotional dimensions, after controlling for season, parents’ occupational status and self-rated health, higher scores for behavioral activity predicted higher levels of daily SB in women (Table2). The association was small (β = 0.24, p = 0.035) and did not remain statistically significant either after the Benjamini–Hochberg correction or the additional adjustment with the participant’s occupational status. In the analysis of adult temperament dimensions, higher scores for negative affectivity predicted lower daily MVPA in women (Table3). The association was small (β = −0.27, p = 0.028) and remained statistically significant after controlling for season, participant’s occupational status and self-rated health. The associations were not statistically significant after the Benjamini–Hochberg correction. No other statistically significant associations were found. The associations of personality characteristics with leisure-time and occupational MVPA and SB were further analyzed (Supplementary Material, Tables S2–S5). Although behavioral activity was linked to higher levels of daily SB in women (Table2, Model 2), it was not Table 1 Descriptive statistics All Women Men Gender difference N Mean (SD) N Mean (SD) N Mean (SD) t adf p Socioemotional behavior (0–3) Behavioral activity 142 2.09 (0.73) 78 2.19 (0.71) 64 1.97 (0.73) 1.81 140 0.073 Well-controlled behavior 142 1.50 (0.72) 78 1.58 (0.71) 64 1.40 (0.74) 1.50 140 0.135 Negative emotionality 142 0.48 (0.44) 78 0.39 (0.38) 64 0.60 (0.48) –2.81 118 0.006 Temperament (1–7) Surgency 131 4.30 (0.71) 73 4.33 (0.64) 58 4.26 (0.78) 0.59 129 0.555 Effortful control 131 4.87 (0.61) 73 4.89 (0.57) 58 4.85 (0.65) 0.36 129 0.722 Negative affectivity 131 3.72 (0.69) 73 3.94 (0.62) 58 3.44 (0.69) 4.35 129 < 0.001 Orienting sensitivity 131 4.76 (0.79) 73 4.95 (0.73) 58 4.52 (0.80) 3.19 129 0.002 Physical activity (min/day) Whole-day MVPA 142 55.25 (31.37) 78 54.11 (31.49) 64 56.64 (31.42) –0.48 140 0.634 Leisure-time MVPA 141 44.39 (27.87) 78 43.78 (26.52) 63 45.14 (29.65) –0.29 139 0.776 Occupational MVPA 99 21.45 (18.81) 61 19.32 (19.03) 38 24.87 (18.17) –1.44 97 0.154 Sedentary behavior (min/day) Whole-day SB 142 514.32 (104.55) 78 527.65 (93.22) 64 498.09 (115.56) 1.69 140 0.094 Leisure-time SB 141 373.59 (130.21) 78 366.01 (131.32) 63 382.97 (129.25) –0.77 139 0.444 Occupational SB 99 289.72 (125.33) 61 302.28 (121.97) 38 269.56 (129.62) 1.27 97 0.208 Wear time (h/day) Whole-day wear time 142 14.69 (1.10) 78 14.70 (1.00) 64 14.67 (1.23) 0.13 140 0.898 Leisure-time wear time 141 10.82 (2.82) 78 10.65 (2.74) 63 11.03 (2.91) –0.78 139 0.435 Occupational wear time 99 7.84 (1.91) 61 7.50 (1.84) 38 8.37 (1.93) –2.26 97 0.026 Self-rated health (1–5) 142 3.92 (0.83) 78 3.96 (0.75) 64 3.87 (0.93) –0.60 119 0.549 % % % x2 b df p Season 142 78 64 0.07 1 0.866 Summer 67 47.2 36 46.2 31 48.4 Fall, winter or spring 75 52.8 42 53.8 33 51.6 Parents’ occupational status 142 78 64 9.63 2 0.007 Blue collar 99 69.7 59 75.6 40 62.5 Lower white-collar 33 23.2 11 14.1 22 34.4 Upper white-collar 10 7.0 8 10.3 2 3.1 Occupational status 142 78 64 43.00 2 < 0.001 Blue collar 33 23.2 4 5.1 29 45.3 Lower white-collar 64 45.1 52 66.7 12 18.8 Upper white-collar 45 31.7 22 28.2 23 35.9 Note. MVPA = moderate-to-vigorous physical activity, SB = sedentary behavior, N = number, SD = standard deviation, t = t-value, df = degrees of freedom, p = p-value, x2 = chi-square value. All statistically significant p-values (p < 0.05) remained statistically significant after the Benjamini–Hochberg correction. a independent samples t-test b chi-square test Page 7 of 12Ahola et al. BMC Public Health (2023) 23:1179 Table 2 Linear regressions of child socioemotional dimensions predicting whole-day MVPA and SB. Whole-day MVPA Whole-day SB Model 1 aModel 2 bModel 3 cModel 1 aModel 2 bModel 3 c β p R2adj. β p R2adj. β p R2adj. β p R2adj. β p R2adj. β p R2adj. Women 0.08 0.14 0.11 0.08 0.15 0.20 Behavioral activity 0.04 0.714 –0.02 0.842 –0.02 0.874 0.19 0.100 0.24 0.035 0.18 0.102 Well-controlled behavior 0.03 0.765 0.10 0.396 0.10 0.407 0.06 0.618 0.05 0.656 0.06 0.624 Negative emotionality –0.04 0.752 0.02 0.834 0.02 0.865 –0.01 0.956 –0.05 0.636 –0.06 0.607 Men 0.03 0.15 0.22 0.10 0.13 0.10 Behavioral activity 0.01 0.930 0.03 0.829 –0.04 0.774 0.09 0.501 0.07 0.577 0.07 0.585 Well-controlled behavior –0.15 0.307 –0.21 0.134 –0.22 0.116 –0.17 0.223 –0.12 0.405 –0.11 0.450 Negative emotionality –0.09 0.550 –0.02 0.911 –0.06 0.657 –0.04 0.781 –0.05 0.727 –0.05 0.765 Note. Socioemotional dimensions analyzed in same regression models. Women N = 78, men N = 64. Square root transformation of whole-day MVPA was used. MVPA = moderate-to-vigorous physical activity, SB = sedentary behavior, β = standardized beta-coefficients, p = p-value, R2adj. = adjusted coefficient of determination for the model. Statistically significant results bolded. None of the standardized beta-coefficients remained statistically significant after the Benjamini–Hochberg correction. a Model 1: Adjusted for accelerometer wear time b Model 2: Adjusted for accelerometer wear time, season, parents’ occupational status, and self-rated health c Model 3: Adjusted for accelerometer wear time, season, parents’ occupational status, self-rated health, and participant’s occupational status Page 8 of 12Ahola et al. BMC Public Health (2023) 23:1179 statistically significantly associated with either leisuretime (Table S2) or occupational SB (Table S3). Domainspecific analyses, however, revealed that the inverse association of the women’s negative affectivity with MVPA was apparent during leisure time (β = −0.27, p = 0.040) (Table S4). The small association remained statistically significant after controlling for season, participant’s occupational status and self-rated health (β = −0.25, p = 0.045) but not after the Benjamini–Hochberg correction. No new associations were detected in the domain-specific analyses. Sensitivity analyses indicated that exclusion of the participants whose accelerometer measurement period overlapped with the declared COVID-19-related state of emergency in Finland did not change the results. Discussion This longitudinal study examined whether socioemotional behavior in childhood and temperament in middle adulthood predict accelerometer-measured PA and SB in late adulthood. Overall, behavioral activity at age 8 predicted higher levels of daily SB at age 61 in women. However, the association did not remain statistically significant after controlling for participant’s occupational status. Negative affectivity at age 42 predicted, in turn, lower daily MVPA at age 61 in women. This association was observed particularly during their leisure time. In men, personality characteristics were not associated with MVPA and SB. Slightly unexpectedly, girls who were not withdrawn or timid and were busy and played eagerly with other children spent more time sedentary in late adulthood compared with their socially more passive peers. Compared to previous studies from Finland, this result is in conflict with those ones reporting a negative association of surgency with SB among preschool-aged children [23, 27] but in line with the one reporting child temperamental activity as a positive predictor of men’s TV viewing assessed over two decades later [26]. In that study, unadjusted models were also statistically significant for women [26]. Even though the effect sizes of the current findings based on standardized betas were small, they are in line with previous studies assessing longitudinal associations between child personality characteristics and adult health behaviors [16, 26, 40]. In the current study, controlling for parents’ occupational status strengthened the association of behavioral activity with SB. However, the statistically significant association was attenuated following additional adjustment for the participant’s own occupational status. In light of the finding, it seems that socially more active girls have higher occupational statuses in adulthood which are further associated with more SB accumulated during the day. In the previous study based on JYLS, the frequent contacts of girls with other children, namely social activity, was linked to high career orientation, including for example occupational status and education, in adulthood [41]. Higher occupational class has also been linked to higher levels of accelerometer-measured SB [42], providing additional support for the possible developmental path. Furthermore, the role of occupational status on the longitudinal association of behavioral activity with SB explains the disparity with the results of cross-sectional studies conducted in early childhood [23, 27] where social characteristics may also be expressed as active playing with peers. Consistent with the hypothesis, women who experienced more negative emotions (e.g., frustration) in middle adulthood engaged less in MVPA in late adulthood, particularly during their leisure time, compared with women who experienced less of such emotions. The direction of the observed association is in line with previous findings in childhood [24, 30] and adulthood [29] and is further supported by studies reporting a consistent inverse association of equivalent effect size between conceptually similar personality trait neuroticism and MVPA [43, 44]. As discussed in the literature regarding the associations of personality traits with PA, the findings could be explained by the tendency of women who display high negative affectivity to experience displeasing emotions, such as discomfort, which might, in turn, impact how they enjoy less MVPA or how they prefer other types of lower-stimulus activities [45]. The fear of embarrassment may also serve as a barrier to engaging in intensive PA [46], while negative emotions may be associated with less autonomous motivation toward PA which, in turn, leads to less incidental PA [47]. The latter may also explain why the current findings were observed in women, although Karvonen et al. [29] found a negative relationship between negative affectivity and self-reported overall and vigorous PA in men participating in the same longitudinal study. In addition to the differences in sample sizes and lengths of follow-up, personality characteristics may be differently related to habitual and incidental PA captured by accelerometers compared to more deliberate PA captured by self-reports [43]. Although a follow-up period of several decades increases the remarkability of the current findings, it might also be a focal reason why only a few associations were detected in women and none in men. In men, there might be other factors (e.g., social support) associated with PA and SB that are more important, given that they are complex behaviors related to multiple individual, social, and environmental factors [48, 49]. Compared to the more deliberate PA, habitual and incidental physical movements may also be even more challenging to predict. Overall, only a maximum of one fifth of the variance for daily MVPA and SB was explained by the personality characteristics and covariates.