Table 2.
OR and 95% CI for influenza A (H1N1) infection according to BMI and WC quartiles in school‐aged children
| BMI quartile (kg/m2) | Waist circumference quartile (cm) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Q1 <17·25 | Q2 17·25–19·03 | Q3 19·04–20·93 | Q4 >20·93 | P for trend | Q1 <60·96 | Q2 60·96–66·03 | Q3 66·04–71·11 | Q4 >71·11 | P for trend | |
| Model 1 | 1 (reference) | 1·29 (0·95–1·76) | 1·35 (1·00–1·86) | 2·05 (1·54–2·73) | <0·01 | 1 (reference) | 1·05 (0·79–1·41) | 1·11 (0·84–1·48) | 3·14 (2·40–4·11) | <0·01 |
| Model 2 | 1 (reference) | 1·26 (0·91–1·73) | 1·32 (0·95–1·83) | 1·95 (1·43–2·66) | <0·01 | 1 (reference) | 1·11 (0·82–1·51) | 1·16 (0·85–1·60) | 3·05 (2·20–4·24) | <0·01 |
| Model 3 | 1 (reference) | 1·27 (0·90–1·77) | 1·19 (0·83–1·72) | 1·27 (0·86–1·89) | 1 (reference) | 1·03 (0·75–1·44) | 1·06 (0·73–1·52) | 2·71 (1·79–4·11) | <0·01 | |
| Model 4 | 1 (reference) | 1·26 (0·61–1·81) | 1·17 (0·79–1·74) | 1·41 (0·92–2·15) | 1 (reference) | 1·10 (0·72–1·45) | 1·13 (0·76–1·67) | 2·71 (1·74–4·24) | <0·01 | |
OR, odds ratio; CI, confidence interval; BMI, body mass index.
Model 1: unadjusted.
Model 2: adjusted for age and gender.
Model 3: adjusted for age, gender, and waist circumference (WC) or BMI.
Model 4: adjusted for age, gender, WC or BMI, hand washing, wearing a facemask, after‐school study hours, use of public transportation, regular exercise, underlying conditions, influenza A (H1N1) contact history, vaccination, and overseas trip.