Multivariable analysis of the association between fathers’ and youths’ physical activity in the United States

BMC Public Health

Table 4 Simulation analyses of changes in father’s past weekly VPA frequency on youths’ weekly VPA participation and frequency

	Panel 1: Logistic regression of fully-adjusted model
	Predicted probability of youths’ weekly VPA participation (%)
Simulation scenarios:	Full sample	Male sample	Female sample
Baseline (i.e. no change) in father’s past weekly VPA frequency	72.05	76.26	69.27
A one SD increase in father’s past weekly VPA frequency^a	78.30	78.52	78.60
Father’s past weekly VPA frequency set to 3.0^b	74.47	77.30	72.92
Father’s past weekly VPA frequency set to zero	66.67	74.46	60.83
	Panel 2: Negative binomial regression of fully-adjusted model
	Predicted rate of youths’ weekly VPA frequency (days/week)
Simulation scenarios:	Full sample	Male sample	Female sample
Baseline (i.e. no change) in father’s past weekly VPA frequency	2.85	3.22	2.42
A one SD increase in father’s past weekly VPA frequency^a	3.06	3.18	2.76
Father’s past weekly VPA frequency set to 3.0^b	2.93	3.20	2.52
Father’s past weekly VPA frequency set to zero	2.71	3.25	2.19

Notes: All simulation results are based on the fully-adjusted model. Fully-adjusted model (i.e. Equation 1) includes child and family characteristics, contextual measures, and mother’s past VPA, which are the following measures: Age, gender, race, mother’s education, mother’s work hours, family income, local area physical activity-related facility availability, local area median household income, local area degree of urbanization, mother’s past ( lagged t-2 = 2001) weekly number of times of vigorous physical activity participation.
The independent variable of interest, “Father’s past weekly vigorous physical activity frequency” is a continuous measure of weekly number of times of father’s past (lagged t-2 = 2001) VPA.
^a A one standard deviation (SD) increase in father’s weekly VPA frequency (i.e. times/week) is an increase of 2.67, 2.50, and 2.84 times per week, respectively, for the full, male, and female samples. These standard deviation numbers are obtained from weighted summary statistics and are shown in Table 1.
^b Father’s weekly VPA frequency was set to three to approximate the minimum recommendation of the recent adult aerobic physical activity guidelines for important health benefits of the Centers for Disease Control and Prevention (CDC), which recommend 1 hour and 15 minutes of vigorous-intensity aerobic activity every week, as noted in the text.

ISSN: 1471-2458