Table 4.
Adjusted odds ratio of lung cancer by smoking status according to BMI categories
| BMI (kg/m2) a | Men and Women | Men | Women | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Cases | Controls | Adjusted OR (95% CI) b | Cases | Controls | Adjusted OR (95% CI) c | Cases | Controls | Adjusted OR (95% CI) c | |
| Never Smokers | |||||||||
| Underweight | 33 | 161 | 0.83 (0.53–1.28) | 15 | 97 | 0.88 (0.49–1.60) | 18 | 64 | 0.84 (0.42–1.68) |
| Normal weight | 334 | 1794 | Reference | 169 | 1159 | Reference | 165 | 635 | Reference |
| Overweight | 117 | 916 | 0.77 (0.59–0.99) | 46 | 540 | 0.74 (0.51–1.06) | 71 | 376 | 0.75 (0.51–1.11) |
| Obese | 29 | 233 | 0.71 (0.44–1.14) | 5 | 110 | 0.55 (0.22–1.40) | 24 | 123 | 0.73 (0.40–1.36) |
| Missing | 58 | 40 | – | 19 | 15 | – | 39 | 25 | – |
| Former Smokers | |||||||||
| Underweight | 10 | 58 | 0.27 (0.12–0.61) | 8 | 51 | 0.26 (0.11–0.61) | 2 | 7 | 0.27 (0.02–3.69) |
| Normal weight | 262 | 609 | Reference | 203 | 477 | Reference | 59 | 132 | Reference |
| Overweight | 272 | 729 | 0.70 (0.53–0.93) | 224 | 599 | 0.66 (0.48–0.91) | 55 | 130 | 0.77 (0.36–1.65) |
| Obese | 105 | 297 | 0.55 (0.37–0.80) | 83 | 230 | 0.51 (0.33–0.79) | 22 | 67 | 0.67 (0.27–1.67) |
| Missing | 38 | 42 | 26 | 15 | – | – | 27 | – | |
| Current Smokers | |||||||||
| Underweight | 207 | 189 | 1.24 (0.98–1.58) | 173 | 162 | 1.26 (0.98–1.63) | 34 | 27 | 0.82 (0.38–1.76) |
| Normal weight | 1549 | 1860 | Reference | 1234 | 1511 | Reference | 315 | 349 | Reference |
| Overweight | 710 | 1085 | 0.79 (0.68–0.92) | 537 | 853 | 0.75 (0.63–0.88) | 173 | 232 | 0.87 (0.62–1.23) |
| Obese | 237 | 400 | 0.75 (0.60–0.93) | 167 | 286 | 0.72 (0.55–0.92) | 70 | 114 | 0.73 (0.46–1.15) |
| Missing | 189 | 22 | – | 127 | 6 | – | 62 | 16 | – |
aUnderweight (BMI < 18.5), normal weight (18.5 ≤ BMI < 25), overweight (25 ≤ BMI < 30) and obese (BMI ≥ 30)
bAdjusted for age, gender, study center, time elapsed, pack-years of smoking (except for never smokers) and education level
cAdjusted for age, study center, time elapsed, pack-years of smoking (except for never smokers) and education level