Table 3. Stepwise logistic regression odds ratios of 3% or more weight gain, stratified by race (African Americans vs. whites) in participants enrolled in an ancillary study of the Women’s Health Initiative Observational Study at Baylor College of Medicine and Wake Forest School of Medicine between February 1995 and July 1998.
| Variable | Odds ratio * | 95% CI | P-value |
|---|---|---|---|
| African American women | |||
| Diabetes | |||
| No | 1.00 | Referent | |
| Yes | 0.20 | 0.03–0.96 | 0.06 |
| Smoking status | |||
| Never | 1.00 | Referent | |
| Former | 1.89 | 0.65–5.66 | 0.25 |
| Current | 31.11 | 2.91–867.66 | 0.01 |
| Dietary fiber | 0.92 | 0.85–1.00 | 0.05 |
| Weight change for the past 2 years † | 1.18 | 1.03–1.38 | 0.02 |
| White women | |||
| Age at baseline | |||
| < 65 years | 1.00 | Referent | |
| ≥65 years | 0.60 | 0.39–0.93 | 0.02 |
| Dietary fiber | 0.97 | 0.94–1.00 | 0.06 |
| BMI at baseline | 0.93 | 0.89–0.98 | 0.002 |
| BMI at 35 years | 1.06 | 1.00–1.13 | 0.06 |
| Weight change for the past 2 years † | 1.05 | 1.00–1.10 | 0.03 |
| ≥10 pounds lost intentionally within the past 20 years ** | |||
| No | 1.00 | Referent | |
| Yes | 1.64 | 1.04–2.58 | 0.03 |
CI, confidence interval; BMI, body mass index.
* In the analysis for African American women, due to scanty sample size, a lifetime partner variable was excluded.
† Weight-change was assessed at the third annual visit.
** Intentional weight loss of more than 10 pounds was examined within the past 20 years, when participants were not pregnant or sick.