Trajectories of self-reported physical activity and predictors during the transition to old age: a 20-year cohort study of British men

Table 2 Trajectories of physical activity and the effects of time-varying predictors on trajectory shapes, by trajectory group (n = 4952)^a

	Parameter^b	Estimate	SE	p value
Low Decreasing
	Intercept	1.362	0.052	<0.001
	Linear	0.073	0.015	<0.001
	Quadratic	−0.006	0.001	<0.001
	Time-varying covariates
	Not employed	−0.306	0.077	<0.001
	N. of CVD diagnoses	−0.408	0.050	<0.001
Light Stable
	Intercept	2.212	0.042	<0.001
	Linear	−0.011	0.003	<0.001
	Time-varying covariates
	Not employed	0.324	0.050	<0.001
	N. of CVD diagnoses	−0.118	0.042	0.005
Moderate Increasing
	Intercept	3.631	0.050	<0.001
	Linear	0.024	0.004	<0.001
	Time-varying covariates
	Not employed	0.847	0.065	<0.001
	N. of CVD diagnoses	−0.060	0.060	0.313

^aEstimates for time-varying covariates represent the shift in physical activity trajectory per unit change in exposure variable
^bModels adjusted for employment status and number of CVD diagnoses as time-varying covariates, and occupational class, marital status, number of children, region, BMI, arthritis, bronchitis, blood pressure, breathlessness, chest pain, smoking status, alcohol consumption and breakfast consumption at baseline

ISSN: 1479-5868