Table 2. Stepwise logistic regression odds ratios of 3% or more weight gain, stratified by age (< 65 years vs. ≥65 years) 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 |
|---|---|---|---|
| Age < 65 years | |||
| Age at menopause | 0.97 | 0.94–0.99 | 0.02 |
| Dietary fiber | 0.97 | 0.94–1.00 | 0.06 |
| BMI at baseline | 0.92 | 0.88–0.96 | 0.001 |
| BMI at 35 years | 1.06 | 1.00–1.14 | 0.06 |
| Weight change for the past 2 years * | 1.08 | 1.02–1.14 | 0.01 |
| ≥10 pounds lost intentionally within the past 20 years ** | |||
| No | 1.00 | Referent | |
| Yes | 1.92 | 1.17–3.18 | 0.01 |
| Age ≥65 years | |||
| Dietary fiber | 0.93 | 0.88–0.98 | 0.01 |
CI, confidence interval; BMI, body mass index.
* 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.