Table 4

 Differences in percentage 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−2.53 (−3.76 to −1.30)<0.001−2.47 (−3.74 to −1.20)0.001−2.58 (−4.29 to −0.87)0.023−2.96 (−4.47 to −0.91)0.022
Slimming World−1.52 (−2.75 to −0.30)0.106−1.24 (−2.52 to 0.04)0.408−0.88 (−2.60 to 0.83)1.0000.98 (−2.78 to 0.81)1.000
Rosemary Conley−2.18 (−3.41 to −0.96)0.004−2.38 (−3.66 to −1.09)0.002−1.08 (−2.79 to 0.63)1.000−1.41 (−3.21 to 0.38)0.861
NHS Size Down−0.17 (−1.40 to 1.06)1.0000.04 (−1.25 to 1.32)1.000−1.30 (−3.01 to 0.42)0.965−1.65 (−3.45 to 0.16)0.500
General practice0.77 (−0.58 to 2.12)1.0000.81 (−0.60 to 2.21)1.0000.21 (−1.67 to 2.10)1.000−0.12 (−2.09 to 1.86)1.000
Pharmacy0.00 (−1.36 to 1.35)1.0000.01 (−1.44 to 1.46)1.0000.36 (−1.53 to 2.25)1.000−0.05 (−2.08 to 1.99)1.000
Choice−1.39 (−2.62 to −0.16)0.185−1.39 (−2.67 to −0.120.227−1.26 (−2.97 to 0.45)1.000−1.66 (−3.45 to 0.12)0.474

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.