Table 3.

The association between psychosocial factors and change in physical activity outcomes

	Unadjusted			Adjusted
	N	β (95% CI)	P value	N	β (95% CI)	P value
Social support
Objective
Acceleration (mg/min)	588	-0.37 (-0.83 to 0.09)	0.111	538	-0.29 (-0.83 to 0.24)	0.283
Self-report
Total physical activity (h/w)	608	-0.27 (-1.02 to 0.48)	0.475	560	0.03 (-0.78 to 0.84)	0.945
Vigorous physical activity (h/w)	690	-0.58 (-1.16 to 0.00)	0.051	631	0.09 (-0.53 to 0.71)	0.778
Stress
Objective
Acceleration (mg/min)	599	0.19 (-0.37 to 0.76)	0.501	547	0.09 (-0.58 to 0.76)	0.795
Self-report
Total physical activity (h/w)	619	-1.89 (-2.82 to -0.96)	< 0.001	569	-1.42 (-2.44 to -0.41)	0.006
Vigorous physical activity (h/w)	707	-1.73 (-2.46 to -1.00)	< 0.001	645	-1.53 (-2.30 to -0.75)	< 0.001
Mood (feeling down)
Objective
Acceleration (mg/min)	598	0.08 (-1.22 to 1.38)	0.903	546	-0.06 (-1.49 to 1.37)	0.935
Self-report
Total physical activity (h/w)	618	-2.40 (-4.54 to -0.26)	0.028	568	-1.34 (-3.53 to 0.85)	0.230
Vigorous physical activity (h/w)	707	-1.33 (-3.01 to 0.35)	0.120	645	-0.74 (-2.42 to 0.93)	0.383
Mood (anhedonia)
Objective
Acceleration (mg/min)	597	0.93 (-0.34 to 2.20)	0.152	545	1.03 (-0.36 to 2.41)	0.146
Self-report
Total physical activity (h/w)	618	-2.43 (-4.84 to -0.03)	0.048	568	-1.49 (-3.95 to 0.97)	0.235
Vigorous physical activity (h/w)	704	-2.16 (-4.02 to -0.29)	0.024	643	-1.64 (-3.50 to 0.21)	0.082

Assessed by multiple linear regression, reporting beta coefficients. Vigorous physical activity includes walking, cycling and sport. All models are adjusted for baseline PA; the adjusted model is also adjusted for age, sex, randomisation group, marital status, income level, education level and occupation type

95% CI 95% confidence interval, h/w hours per week