Randomised controlled trial and economic evaluation of a task-based weight management group programme

BMC Public Health

Table 2 Mean weight loss over 12 months

	PN PNI arm Mean (SD)^a	WAP arm Mean (SD)^a	Treatment effect (95% CI)^b	P-value
2 months	−2·2 (2·6)	-3·2 (2·7)	-1·0 (−1·7, −0.3)	0·009
6 months	-2·1 (4·3)	−5·0 (5·4)	−2·5 (−3·8, −1.2)	< 0·001
12 months	− 2·3 (6·6)	−4·2 (7·3)	−1·9 (− 3·7, − 0.1)	0·04

^aThe total sample used was based on those with a documented weight measurement at each follow-up time-point. For the PNI arm this was 62, 70, and 83 at 2, 6 and 12 months respectively. For the WAP arm it was 144, 141, and 149
^bFor the treatment effect, which was calculated using a mixed-effects regression model, the total sample was 97 and 194, for the PNI and WAP arms, respectively

ISSN: 1471-2458