Table 3 Relationship between body mass index and acute myocardial infarction using three different methods to account for missing values (odds ratio, 95% confidence interval). The normal BMI category (18.0–24.9 kg/m2) was used as the reference group.
From: Lifestyle variables and the risk of myocardial infarction in the General Practice Research Database
Body mass index (kg/m2) | Case Deletion | Indicator Variable | Multiple Imputation (10 copies) |
|---|---|---|---|
Crude Estimates of Effect | |||
<18.0 | 1.23 (1.03–1.46) | 1.21 (1.02–1.44) | 1.03 (0.91–1.17) |
18.0–24.9 | Reference | Reference | Reference |
25.0–29.9 | 1.21 (1.15–1.27) | 1.21 (1.15–1.27) | 1.20 (1.16–1.24) |
≥30.0 | 1.35 (1.27–1.43) | 1.35 (1.27–1.43) | 1.40 (1.34–1.46) |
Missing Indicator | n/a | 0.96 (0.91–1.02) | n/a |
Adjusted* Estimates of Effect | |||
<18.0 | 1.15 (0.96–1.37) | 1.13 (0.95–1.35) | 1.00 (0.87–1.11) |
18.0–24.9 | Reference | Reference | Reference |
25.0–29.9 | 1.18 (1.12–1.24) | 1.18 (1.12–1.24) | 1.16 (1.14–1.21) |
≥30.0 | 1.35 (1.27–1.44) | 1.35 (1.27–1.44) | 1.41 (1.35–1.47) |
Missing Indicator | n/a | 1.13 (1.06–1.20) | n/a |