Multivariable analysis of the association between fathers' and youths' physical activity in the United States.
BACKGROUND
Although the benefits of physical activity have been well-established, a significant number of children and adolescents in the U.S. do not meet the recommended levels of daily physical activity. Parental influences such as parents' physical activity participation may play an important role in affecting youths' physical activity.


METHODS
This study used the Child Development Supplement of the Panel Study of Income Dynamics to examine the associations between fathers' vigorous physical activity (VPA) and VPA participation (>0 day(s)/week) and frequency (days/week) of 887 youths aged 10 through 18 based on a nationally representative sample of families in the US. Logistic and negative binomial regression analyses were used to examine the association between past frequency (times/week) and an indicator of recommended (≥3 times/week) frequency of father's VPA and youth's VPA participation and youths' VPA frequency, respectively. We examined the sensitivity to the inclusion of various youth, family, mother's VPA, and contextual control measures. Analyses also were undertaken by gender.


RESULTS
Father's past VPA frequency was positively associated with both youths' VPA participation and with youths' VPA frequency for the full and female samples of youths, even after the inclusion of demographic, socio-economic, and local area characteristics. Father's past recommended VPA frequency was positively associated with youths' VPA participation in the full sample only and with youths' VPA frequency in the female sub-sample only. Simulation results showed that an increase in father's past weekly VPA frequency from zero to the minimum recommended level (three times per week) was associated with an increased predicted probability of youths' weekly VPA participation from approximately 67% to 74% for the full sample (61% to 73% for females and 74% to 77% for males).


CONCLUSIONS
The results from this study suggest that environmental and/or family based interventions that increase fathers' VPA may help improve youths' VPA.
Zeynep
Z
Isgor
Health Policy and Administration, School of Public Health and Institute for Health Research and Policy, University of Illinois at Chicago, Chicago, IL, USA. powelll@uic.edu.
Lisa M
LM
Powell
Youfa
Y
Wang
D000293:Adolescent; D002648:Child; D003625:Data Collection; D005219:Father-Child Relations; D005220:Fathers / Q000523:psychology / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D008297:Male; D009043:Motor Activity; D015999:Multivariate Analysis; D014481:United States / Q000453:epidemiology