Table 1.
Analysis of covariance table of mean differences based on the provision of digital scalea.
| Engagement features | No scale, mean (SE) | Scale, mean (SE) | F test (df) | P value |
| Days with weigh-ins during first 6 months | 7.35 (0.24) | 21.56 (0.66) | 276.80 (1, 3202) | <.001 |
| Days of active retention in first 12 months | 120.44 (2.28) | 172.45 (2.77) | 15.74 (1, 3202) | <.001 |
aAnalyses of covariance include age, sex, BMI, and days of active retention as control variables; 3208 members included in the analysis who had no missing data needed for analyses; 1822 members with no scale and 1386 members with scale.