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Table 2 Mean weight loss over 12 months

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

  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
  1. 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
  2. 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