TY - JOUR
T1 - Resemblance in physical activity levels
T2 - The Portuguese sibling study on growth, fitness, lifestyle, and health
AU - Pereira, S.
AU - Katzmarzyk, P. T.
AU - Gomes, T. N.
AU - Souza, M.
AU - Chaves, R. N.
AU - Santos, F. K.
AU - Santos, D.
AU - Bustamante, A.
AU - Barreira, Tiago
AU - Hedeker, D.
AU - Maia, J. A.
N1 - Publisher Copyright:
© 2017 Wiley Periodicals, Inc.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Objectives: To investigate the relationships of biological, behavioral, familial, and environmental characteristics with siblings´ physical activity (PA) levels as well as the intrapair resemblance in PA. Methods: The sample comprises 834 (390 females) biological siblings [brother-brother (BB), sister-sister (SS), brother-sister (BS)] aged 9 to 20 years. Total PA index (TPAI) was estimated by questionnaire. Information on potential behavioral, familial, and environmental correlates was obtained by self-report; body mass index (BMI), biological maturation, and physical fitness were measured. Multilevel models were used to analyze siblings´ clustered data, and sibling resemblance was estimated with the intraclass correlation (ρ). Results: On average, younger sibs, those more physically fit, and those with more parental support had greater TPAI. Further, BB pairs had higher TPAI levels than SS or BS pairs, but also had greater within-pair variance. When adjusted for all covariates, SS pairs demonstrated greater resemblance in TPAI (ρ = 0.53, 95%CI = 0.38–0.68) than BS (ρ = 0.26, 95%CI = 0.14–0.43) or BB pairs (ρ = 0.18, 95%CI = 0.06–0.44). Conclusions: Age, physical fitness, and parental support were the best predictors of TPAI levels. A moderate level of resemblance in TPAI was observed in SS pairs, while lower resemblance was found for BS and BB pairs. These findings may be due to differences in the roles of shared genetic factors, familial, and environmental characteristics across different sibling types.
AB - Objectives: To investigate the relationships of biological, behavioral, familial, and environmental characteristics with siblings´ physical activity (PA) levels as well as the intrapair resemblance in PA. Methods: The sample comprises 834 (390 females) biological siblings [brother-brother (BB), sister-sister (SS), brother-sister (BS)] aged 9 to 20 years. Total PA index (TPAI) was estimated by questionnaire. Information on potential behavioral, familial, and environmental correlates was obtained by self-report; body mass index (BMI), biological maturation, and physical fitness were measured. Multilevel models were used to analyze siblings´ clustered data, and sibling resemblance was estimated with the intraclass correlation (ρ). Results: On average, younger sibs, those more physically fit, and those with more parental support had greater TPAI. Further, BB pairs had higher TPAI levels than SS or BS pairs, but also had greater within-pair variance. When adjusted for all covariates, SS pairs demonstrated greater resemblance in TPAI (ρ = 0.53, 95%CI = 0.38–0.68) than BS (ρ = 0.26, 95%CI = 0.14–0.43) or BB pairs (ρ = 0.18, 95%CI = 0.06–0.44). Conclusions: Age, physical fitness, and parental support were the best predictors of TPAI levels. A moderate level of resemblance in TPAI was observed in SS pairs, while lower resemblance was found for BS and BB pairs. These findings may be due to differences in the roles of shared genetic factors, familial, and environmental characteristics across different sibling types.
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U2 - 10.1002/ajhb.23061
DO - 10.1002/ajhb.23061
M3 - Article
C2 - 28925585
AN - SCOPUS:85030033950
SN - 1042-0533
VL - 30
JO - American Journal of Human Biology
JF - American Journal of Human Biology
IS - 1
M1 - e23061
ER -