| Number | Cases | Age-adjusted ORa (95 % CI) | Multivariate-adjusted ORa (95 % CI) | |
---|---|---|---|---|---|
Model 1 | Model 2 | ||||
Total | |||||
 Q1 | 281 | 47 | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
 Q2 | 281 | 63 | 1.29 (0.84–1.98) | 1.12 (0.72–1.75) | 1.16 (0.74–1.82) |
 Q3 | 282 | 99 | 2.31 (1.54–3.47) | 1.95 (1.27–2.99) | 2.04 (1.33–3.15) |
 Q4 | 280 | 109 | 2.34 (1.55–3.52) | 1.90 (1.22–2.95) | 2.14 (1.34–3.41) |
 P for trend |  |  | <0.001 | 0.001 | <0.001 |