Table 4.
Odds ratios for BE associated with frequency of acid reflux, cross-classified by smoking and maximum obesity
| Frequency of episodes of acid reflux in current age group | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Never | Monthly | Weekly | |||||||
| Controls | Cases | OR (95% CI) | Controls | Cases | OR (95% CI) | Controls | Cases | OR (95% CI) | |
|
Smoking (pack years)* | |||||||||
| Never smoker | 25% | 7% | 1.0 | 19% | 9% | 1.9 (0.7-5.5) | 2% | 8% | 16.9 (4.2-67.5) |
| Ever smoker | 31% | 15% | 2.4 (0.9-6.8) | 20% | 34% | 7.3 (2.8-19.4) | 2% | 27% | 51.4 (14.1-188) |
|
Maximum BMI† | |||||||||
| 18.5 to 24.9 kg/m2 | 14% | 8% | 1.0 | 11% | 8% | 1.1 (0.4-3.7) | 1% | 5% | 9.3 (1.4-62.2) |
| 25 to 29.9 kg/m2 | 27% | 8% | 0.6 (0.2-1.7) | 18% | 18% | 1.7 (0.6-1.6) | 3% | 12% | 7.9 (2.3-27.6) |
| ≥ 30 kg/m2 | 15% | 6% | 0.7 (0.2-2.4) | 12% | 18% | 2.5 (0.9-7.0) | 1% | 18% | 34.4 (6.3-188) |
*
Odds ratio and 95% confidence intervals adjusted for age (continuous), sex, BMI (continuous)
†
Odds ratio and 95% confidence intervals adjusted for age (continuous), sex, pack years smoked (continuous)