Table 3.

Univariate associations between predictor variables and patterns of physical activity participation during adolescence

	Persistent Inactivity vs PA, DP, IP				Declining Participation vs PA, IP				Persistent Activity vs DP, IP, PI
Variables	n	OR	95% CI	p-value	n	OR	95% CI	p-value	n	OR	95% CI	p-value
Childhood measures
Socioeconomic statusa	769	1.19	1.04–1.37	0.01	461	1.01	0.85–1.19	0.94	769	0.85	0.72–1.00	<0.05
Family Active Rec. Orient.b	746	0.74	0.63–0.87	<0.01	453	0.90	0.74–1.11	0.33	746	1.41	1.16–1.75	<0.01
Home activitiesc	704	0.85	0.73–1.00	<0.05	428	0.74	0.60–0.92	<0.01	704	1.49	1.20–1.84	<0.01
Childhood motor abilityd	710	0.90	0.76–1.06	0.21	435	0.92	0.73–1.17	0.51	710	1.30	1.04–1.61	0.02
IQe	757	1.01	0.87–1.18	0.89	458	0.92	0.74–1.11	0.37	757	1.16	0.97–1.39	0.11
Psychiatric disorder
any disorder	770	1.07	0.79–1.45	0.67	461	0.88	0.60–1.29	0.51	770	1.07	0.72–1.53	0.72
no disorder		1.00				1.00				1.00
Contemporaneous measures
Parent health
not very good	690	1.54	1.08–2.19	0.02	426	1.59	0.98–2.56	0.06	690	0.58	0.37–0.92	0.02
very good		1.00				1.00				1.00
Body mass index
overweight/obese	765	0.98	0.61–1.57	0.94	458	1.05	0.57–1.95	0.87	765	0.73	0.39–1.38	0.33
normal weight		1.00				1.00				1.00
Predicted VO2maxf	762	0.67	0.56–0.81	<0.01	457	0.85	0.69–1.03	0.10	762	1.53	1.26–1.84	<0.01
General health
not very good	765	1.63	1.20–2.21	<0.01	457	1.37	0.94–2.00	0.10	765	0.57	0.40–0.81	<0.01
very good		1.00				1.00				1.00
Television viewingg	727	1.20	1.03–1.39	0.02	440	1.13	0.93–1.37	0.23	727	0.70	0.57–0.85	<0.01
Tobacco smoking
smoker	766	1.11	0.76–1.62	0.59	458	1.47	0.88–2.47	0.14	766	0.87	0.53–1.41	0.56
non-smoker		1.00				1.00				1.00
Alcohol use
been drunk	764	0.94	0.69–1.30	0.73	458	1.23	0.82–1.83	0.32	764	0.83	0.57–1.21	0.34
never been drunk		1.00				1.00				1.00

Key

PI: Persistent Inactivity

PA: Persistent Activity

DP: Declining Participation

IP: Increasing Participation

CI: Confidence Interval

OR: Odds Ratio

All analyses controlled for sex

Table notes: Reference groups

^aHigher SES

^bLower Family Active Recreation Orientation scores

^cFewer Home Activities

^dLower motor ability scores

^eHigher IQ scores

^fLower Predicted VO₂max scores

^gGreater time spent Television viewing