Table 1.
Mean (95% CI) weight change for a cohort of participants who subscribed to a commercial Web-based weight loss program for 12 or 52 weeks using GLMM and LOCF analyses
| Cohort and Weight Change Measure | GLMM Analysisa,b | LOCF Analysisa,b | ||
| 12-week subscribers (n = 6943) | ||||
| Absolute weight change (95% CI) | −5.6 kg (−5.8 kg to −5.5 kg) | −2.6 kg (−2.7 kg to −2.5 kg) | ||
| Percentage weight change (95% CI) | −6.2% (−6.3% to −6.1%) | −3.0% (−3.0% to −2.9%) | ||
| Percentage weight change category | ||||
| Weight gain, n (%) | 423 (6.1%) | |||
| 0% to < 5%, n (%) | 5041 (72.6%) | |||
| 5% to < 10%, n (%) | 1206 (17.4%) | |||
| 10% or more, n (%) | 273 (3.9%) | |||
| 52-week subscribers (n = 2656) | ||||
| Absolute weight change (95% CI) | −8.4 kg (−9.0 kg to −7.8 kg) | −3.6 kg (−3.8 kg to −3.3 kg) | ||
| Percentage weight change (95% CI) | −6.9% (−7.3% to −6.5%) | −3.5% (−3.8% to −3.3%) | ||
| Percentage weight change category | ||||
| Weight gain, n (%) | 424 (16.0%) | |||
| 0% to < 5%, n (%) | 1455 (54.8%) | |||
| 5% to < 10%, n (%) | 475 (17.9%) | |||
| 10% or more, n (%) | 302 (11.4%) | |||
aDifference from baseline to 12 and 52 weeks is statistically significant for all analyses (P < .001).
bControlled for baseline age, BMI, socioeconomic status, and remoteness