Table 2 Comparison of distributions of body mass index and smoking among subjects with measured body mass index values and those with imputed body mass index values.
From: Lifestyle variables and the risk of myocardial infarction in the General Practice Research Database
Cases | Controls | |||
|---|---|---|---|---|
Measured (N = 15,423) | Imputed (N = 3,930) | Measured (N = 146,725) | Imputed (N = 46,096) | |
Body Mass Index | ||||
<18.0 | 1.8% | 3.8% | 1.7% | 4.7% |
18.0–24.9 | 35.2% | 35.6% | 40.9% | 39.9% |
25.0–29.9 | 40.8% | 40.7% | 39.0% | 38.6% |
≥30.0 | 22.1% | 19.9% | 18.3% | 16.8% |
Mean (SD) | 26.8 (4.8) | 26.2 (4.6) | 26.3 (4.7) | 25.6 (4.6) |
Smoking | ||||
Ever | 56.9% | 53.6% | 40.9% | 40.0% |
Never | 43.1% | 46.7% | 59.0% | 60.0% |