Table 3.
Mean change in self-reported weight at 12 months according to sociodemographic characteristics, initial BMI category and level of adherence; Healthy Weight Program, São Paulo, Brazil, 2008
| Change in self-reported weight (kg) | |||
|---|---|---|---|
| Variable | Mean | 95 % CI | P* |
| Sex | |||
| Male | −0·53 | −0·88, −0·19 | 0·132 |
| Female | −0·95 | −1·39, −0·52 | |
| Ethnicity | |||
| White | −0·70 | −1·03, −0·37 | 0·806 |
| Non-white | −0·77 | −1·27, −0·27 | |
| Level of education | |||
| Complete secondary | −0·86 | −1·52, −0·20 | 0·613 |
| Incomplete higher | −0·47 | −1·05, 0·12 | |
| Complete higher | −0·77 | −1·13, −0·44 | |
| Age group | |||
| 18–29 years | −0·20 | −0·61, 0·21 | 0·024 |
| 30–39 years | −1·08 | −1·62, −0·54 | |
| ≥40 years | −0·98 | −1·45, −0·51 | |
| Initial BMI category | |||
| Normal weight (18·5–24·9 kg/m2) | −0·02 | −0·37, 0·33 | <0·001 |
| Overweight (25·0−29·9 kg/m2) | −1·06 | −1·45, −0·67 | |
| Obese (≥30·0 kg/m2) | −1·94 | −2·95, −0·95 | |
| Level of adherence† | |||
| 1st tertile | −0·38 | −0·81, 0·05 | <0·001 |
| 2nd tertile | −0·93 | −1·36, −0·50 | |
| 3rd tertile | −0·83 | −1·38, −0·28 | |
| Total (n 427) | −0·72 | −0·99, −0·45 | |
*Student's t test or ANOVA (P < 0·05 indicates significance).
†Level of adherence to the intervention was described as tertiles of frequency of weight measurements sent to the HWP software, with the 1st tertile representing one to three weight measurements sent (n 136); the 2nd tertile, between four and seven (n 147); and the 3rd tertile, between eight and eleven (n 144).