Table 3.
Odds Ratios for the Joint Association of Body Mass Index and Physical Activity With Current Asthma From Marginal Structural Models, After Truncation of Extreme Weights and Among Nonsmokers (Sensitivity Analyses), Asthma-E3N Study, 2000–2011
| Exposure | Weight Truncationa | Nonsmokers (n = 8,062) | ||
|---|---|---|---|---|
| OR | 95% CI | OR | 95% CI | |
| Body mass indexb | ||||
| <20.0 | 0.90 | 0.79, 1.03 | 0.86 | 0.71, 1.05 |
| 20.0–24.9 | 1.00 | Referent | 1.00 | Referent |
| 25.0–29.9 | 1.29 | 1.17, 1.42 | 1.22 | 1.07, 1.40 |
| ≥30.0 | 1.86 | 1.60, 2.17 | 1.56 | 1.25, 1.96 |
| Tertile of physical activity | ||||
| First | 1.00 | Referent | 1.00 | Referent |
| Second | 1.01 | 0.93, 1.11 | 1.03 | 0.92, 1.16 |
| Third | 1.00 | 0.91, 1.10 | 0.97 | 0.85, 1.11 |
Abbreviations: CI, confidence interval; E3N, Etude Epidémiologique auprès de Femmes de la Mutuelle Générale de l'Education Nationale; OR, odds ratio.
a The values of weights greater than the 99th percentile (i.e., 1.28) were reset to 1.28, and the values of weights lower than the first percentile (i.e., 0.75) were reset to 0.75.
b Weight (kg)/height (m)2.