Table 5.
Crude and adjusted odds ratio (OR) and 95% confidence intervals (95% CI) for severe and mild influenza-like illness (ILI) by age group
| Age group | BMI category | Severe ILI | Mild ILI | ||
|---|---|---|---|---|---|
| Crude OR | Adjusted OR | Crude OR | Adjusted OR | ||
| 20–39 years | Overweight | 1·30 (0·47, 3·58) | 1·47 (0·52, 4·15) | 1·05 (0·93, 1·20) | 1·18 (1·04, 1·35) |
| Obese | 2·33 (0·90, 6·06) | 2·43 (0·91, 6·46) | 1·21 (1·05, 1·38) | 1·33 (1·16, 1·54) | |
| 40–59 years | Overweight | 1·04 (0·63, 1·72) | 1·03 (0·62, 1·72) | 1·03 (0·93, 1·14) | 1·10 (0·98, 1·22) |
| Obese | 2·05 (1·30, 3·23) | 1·84 (1·16, 2·19) | 1·31 (1·18, 1·46) | 1·31 (1·17, 1·45) | |
| ≥60 years | Overweight | 0·98 (0·74, 1·30) | 0·99 (0·75, 1·33) | 0·95 (0·84, 1·08) | 0·99 (0·87, 1·12) |
| Obese | 1·04 (0·78, 1·38) | 1·08 (0·80, 1·46) | 1·03 (0·91, 1·18) | 1·04 (0·91, 1·19) | |
BMI, body mass index.
Severe ILI is a hospitalized ILI visit. Mild ILI is an outpatient ILI visit. Reference group is normal weight (BMI 18·5–24·9); overweight = BMI 25·0–29·9; obese = BMI ≥ 30. Adjusted for sex, age (continuous), and Charlson Comorbidity Index score (continuous).