Effectiveness and cost-effectiveness of a loyalty scheme for physical activity behaviour change maintenance: results from a cluster randomised controlled trial

Table 2 Mean (SD) primary outcome at 6 months and 12 months according to group and ANCOVA results before and after adjusting for season

Outcome	Intervention Group^a		Control Group^a		Analysis of covariance^b		Analysis of covariance^c
Outcome	N	Mean (SD)	N	Mean (SD)	b (95% CI)	p-value	b (95% CI)	p-value
Six month: pedometer steps (steps/day)	249	6990 (3078)	236	7576 (3345)	− 519 (− 931, − 107)	0·01	− 336 (− 612, −60)	0·02
12 month: pedometer steps (steps/day)	210	7790 (3462)	180	8203 (3401)	− 561 (− 1243, 120)	0·11	−570 (− 1267, 127)	0·11

^aMonth six or month 12 outcomes (unadjusted)
^bANCOVA comparison of 6 month/12 month means in Intervention vs Control Group adjusted for baseline values of the outcome, and randomisation stratum and corrected for clustering
^cANCOVA comparison of 6 month/12 month means in Intervention vs Control Group adjusted for baseline values of the outcome, randomisation stratum and season and corrected for clustering
ANCOVA Analysis of covariance, CI confidence interval, SD standard deviation

ISSN: 1479-5868