Evaluation of an intervention to promote walking during the commute to work: a cluster randomised controlled trial

Table 4 Summary statistics and intervention effect estimates (intervention minus control) for primary and secondary measures of physical activity

Outcome	Intervention mean (SD) N		Controlmean (SD) N		Adjusted difference in means^a (95% CI)	P-value^a
Outcome	Baseline	Follow-up	Baseline	Follow-up	Adjusted difference in means^a (95% CI)	P-value^a
Primary
i) Daily minutes of moderate to vigorous physical activity (MVPA)	55.0 (24.9) 142	53.3 (23.7) 142	57.7 (37.0) 180	53.9 (27.6) 180	0.3 (−5.3, 5.9)	0.917
Secondary
ii) Overall physical activity (counts per minute)	390.5 (144.2) 142	387.6 (148.5) 142	417.1 (267.4) 180	392.7 (168.8) 180	3.5 (−30.3, 37.4)	0.838
iii) Sedentary time (minutes per day)	585.5 (63.3) 141	580.0 (97.0) 141	581.9 (80.1) 178	585.4 (108.6) 178	1.0 (−11.7, 13.6)	0.882
iv) Daily minutes of MVPA during commute	13.9 (14.1) 183	13.8 (14.0) 183	13.3 (15.1) 213	16.2 (19.0) 213	−3.1 (−6.0, −0.2)	0.036
Sensitivity analyses of primary outcome
Daily minutes of MVPA: 1 day of valid data	52.6 (25.0) 189	51.1 (23.7) 189	55.5 (35.1) 217	52.6 (28.1) 217	−0.4 (−5.3, 4.5)	0.876

^aMulti-level mixed effect linear regression model adjusted for size, location and type of business, baseline outcome, accelerometer wear-time at follow-up (for outcomes i and iii) and workplace as a random effect

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