A multistage controlled intervention to increase stair climbing at work: effectiveness and process evaluation

Table 2 Stair climbing (count/day/100 employees) at the intervention site compared to the control site for each study period

Period	Number of days analyzed	Intervention site		Control site		Intervention effect^a	p*	p**
Period	Number of days analyzed	Mean ± SE	Δ (95 % CI)	Mean ± SE	Δ (95 % CI)	Intervention effect^a	p*	p**
Baseline	15							<0.001
Intervention 1	19	12.1 ± 0.6	1.5 (-0.1;3.2)	20.2 ± 0.6	0.4 (-1.2;2.0)	1.1 (-1.2;3.4)	0.359
Short-term follow-up 1	15	11.7 ± 0.6	1.1 (-0.6;2.9)	20.9 ± 0.6	1.1 (-0.7;2.8)	0.1 (-2.4;2.5)	0.943
Intervention 2	20	12.6 ± 0.5	2.0 (0.4;3.6)	17.2 ± 0.5	-2.6 (-4.3;-1.0)	4.6 (2.3;6.9)	<0.001
Short-term follow-up	15	11.5 ± 0.6	1.0 (-0.8;2.7)	19.2 ± 0.6	-0.6 (-2.3;1.1)	1.6 (-0.9;4.0)	0.211
Medium-term follow-up	15	11.1 ± 0.6	0.5 (-1.2;2.2)	17.9 ± 0.6	-1.9 (-3.6;-0.2)	2.4 (0;4.9)	0.055
Long-term follow-up	15	10.8 ± 0.6	0.2 (-1.5;1.9)	17.1 ± 0.6	-2.7 (-4.5,-1.0)	2.9 (0.5;5.4)	0.019

All estimates were from the linear mixed regression model, using site and study period as fixed effects
95 % CI confidence interval at 95 %, SE standard error
Δ estimated mean change between baseline and the study period
^a estimated effects in intervention site compared with the control site
*p-value from the interaction effects (i.e. test of difference in change for intervention versus control at each period)
**p-value from the overall interaction effect (i.e. test of difference in change for intervention versus control over time)

ISSN: 1479-5868