Table 3

 Differences in weight loss at programme end and one year follow-up between intervention groups and comparator arm (exercise only)

Intervention groupProgramme endOne year
Mean difference (95% CI)P valueAdjusted mean difference* (95% CI)P valueMean difference (95% CI)P valueAdjusted mean difference* (95% CI)P value
Weight Watchers−2.41 (−3.60 to −1.23)<0.001−2.34 (−3.56 to −1.13)0.001−2.38 (−3.98 to −0.78)0.025−2.49 (−4.15 to −0.83)0.024
Slimming World−1.55 (−2.74 to −0.37)0.072−1.24 (−2.47 to −0.02)0.322−0.81 (−2.41 to 0.78)1.000−0.90 (−2.57 to 0.77)1.000
Rosemary Conley−2.22 (−3.40 to −1.04)0.001−2.39 (−3.61 to −1.16)0.001−1.05 (−2.64 to 0.55)1.000−1.35 (−3.03 to 0.33)0.798
NHS Size Down−0.37 (−1.55 to 0.82)1.000−0.09 (−1.31 to 1.14)1.000−1.37 (−2.97 to 0.23)0.649−1.65 (−3.33 to 0.04)0.386
General practice0.65 (−0.66 to 1.95)1.0000.61 (−0.73 to 1.96)1.0000.25 (−1.51 to 2.01)1.0000.12 (−1.96 to 1.72)1.000
Pharmacy−0.10 (−1.41 to 1.20)1.0000.12 (−1.51 to 1.27)1.0000.41 (−1.35 to 2.17)1.0000.06 (−1.84 to 1.96)1.000
Choice−1.30 (−2.49 to −0.12)0.216−1.33 (−2.55 to −0.11)0.224−1.07 (−2.67 to 0.53)1.000−1.47 (−3.13 to 0.20)0.591

Negative difference favours intervention arm. P values adjusted to maintain overall 5% type 1 error rate across seven comparisons; 95% confidence intervals not adjusted.

*Adjusted for weight at baseline, physical activity at baseline, age, sex, and ethnic group.