Table 2. –
Independent associations of baseline weight status and physical activity with mobility disability at follow-up in the NIH-AARP Diet and Health Study cohort.
| Men | Women | |||
|---|---|---|---|---|
| Odds Ratio | 95% CI | Odds Ratio | 95% CI | |
| Weight status | 1.00 | 1.00 | ||
| Normal weight (BMI 18-<25 kg/m2) | 1.30 | 1.24, 1.36 | 1.58 | 1.52, 1.65 |
| Overweight (BMI 25-<30 kg/m2) | 2.08 | 1.96, 2.20 | 2.63 | 2.49, 2.78 |
| Obese (BMI ≥30 kg/m2) | ||||
| Light physical activity | ||||
| <3 hours/week | 1.00 | 1.00 | ||
| 1-3 hours/week | 0.89 | 0.84, 0.94 | 0.87 | 0.81, 0.94 |
| 4-7 hours/week | 0.83 | 0.78, 0.88 | 0.79 | 0.73, 0.85 |
| >7 hours/week | 0.90 | 0.84, 0.95 | 0.79 | 0.73, 0.85 |
| Moderate/Vigorous physical activity | ||||
| <3 hours/week | 1.00 | 1.00 | ||
| 1-3 hours/week | 0.68 | 0.65, 0.72 | 0.69 | 0.52, 0.58 |
| 4-7 hours/week | 0.53 | 0.50, 0.56 | 0.55 | 0.52, 0.58 |
| >7 hours/week | 0.47 | 0.44, 0.50 | 0.50 | 0.47, 0.53 |
| TV viewing | ||||
| 0-2 hours/day | 1.00 | 1.00 | ||
| 3-4 hours/day | 1.15 | 1.10, 1.2 | 1.22 | 1.17, 1.28 |
| ≥5 hours/day | 1.44 | 1.36, 1.52 | 1.49 | 1.41, 1.57 |
Estimates are based on multivariable logistic regression modeling, with adjustment for age, race, education, baseline smoking, baseline caloric intake, and follow-up health status. For men: normal weight (n=25 157); overweight (n=39,791); and obese (n=13,092). For women: normal weight (n=27 884); overweight (n=19 849); and obese (n=9 447). Odds ratios (OR) and 95% confidence intervals (95%CI) are reported to describe the excess risk of disability for each level of weight status and each level of light- and moderate-to-vigorous intensity physical activity relative to the referent group (normal weight for weight status; <3 h/week for physical activity; and <2 h/day for TV viewing).