Table 2.
Univariable associations of baseline characteristics and self-monitoring with weight loss at 1 year*
| Variable | Percent Weight Loss, Absolute |
Percent Weight Loss, Between-Group Difference (95% CI) |
P value** |
|---|---|---|---|
| Race/ethnicity | <0.001 | ||
| Non-Hispanic white (referent) | 10.24% | ||
| African-American | 7.31% | −2.93% (−1.29, −4.57) | |
| Hispanic-American | 6.69% | −3.55% (−1.20, −5.90) | |
| Mixed/other | 5.52% | −4.72% (−1.48, −7.97) | |
| Age | 0.36 | ||
| 45–54 (referent) | 8.72% | ||
| 55–64 | 9.23% | 0.51% (−1.01, 2.04) | |
| 65–75 | 10.07% | 1.35% (−0.51, 3.20) | |
| Gender | 0.64 | ||
| Female (referent) | 9.15% | ||
| Male | 9.45% | 0.30% (−0.96, 1.55) | |
| Education | 0.31 | ||
| High school or less (referent) | 8.72% | ||
| Some college | 9.29% | 0.57% (−1.41, 2.55) | |
| College graduate | 9.79% | 1.07% (−0.30, 2.44) | |
| Baseline BMI | 0.34 | ||
| 25–29.9 kg/m2 (referent) | 7.82% | ||
| 30–34.4 kg/m2 | 9.27% | 1.45% (−0.66, 3.55) | |
| 35–39.9 kg/m2 | 9.77% | 1.95% (−0.18, 4.08) | |
| ≥ 40.0 kg/m2 | 9.45% | 1.63% (−0.53, 3.79) | |
| Insulin use | 0.012 | ||
| No (referent) | 9.61% | ||
| Yes | 7.34% | −2.27% (−0.50, −4.04) | |
| Average words ┼ | <0.001 | ||
| 5–19 (referent) | 7.65% | ||
| 20–26 | 7.95% | 0.30% (−1.49, 2.09) | |
| 27–33 | 10.23% | 2.58% (0.75, 4.40) | |
| ≥34 | 10.99% | 3.34% (1.57, 5.11) | |
| Average numbers┼ | <0.001 | ||
| <3 (referent) | 7.74% | ||
| 3–4 | 9.19% | 1.45% (−0.48, 3.38) | |
| 5–7 | 8.46% | 0.72% (−1.00, 2.43) | |
| ≥8 | 11.24% | 3.50% (1.87, 5.13) | |
| Average eating episodes┼ | 0.10 | ||
| <4 (referent) | 8.47% | ||
| 4 | 9.33% | 0.86% (−0.67, 2.39) | |
| ≥5 | 10.11% | 1.64% (0.12, 3.15) | |
| Exercise± | 0.15 | ||
| 0–2 days (referent) | 8.53% | ||
| 3–6 days | 8.66% | 0.12% (−1.69, 1.92) | |
| 7–10 days | 9.56% | 1.03% (−0.70, 2.76) | |
| ≥ 11 days | 10.32% | 1.79% (0.08, 3.50) |
*
Each row shows the mean weight loss within the subgroup (referent and comparator groups). The rows for the subgroups show the absolute weight loss within that group, followed by the difference between the referent category and the comparator subgroup, and the 95% confidence intervals of the difference
**
P value for overall F test
┼
Categories for words and numbers are in quartiles, categories for eating episodes are in tertiles
±
Days of exercise recorded during run-in period (range, 0–14)