Table 5. Comparison of prevalence of obesity and odds ratio for obesity in female smokers stratified by pack-years.
| Cochran-Mantel-Haenszel trend test | Multiple logistic regression | |||||||
|---|---|---|---|---|---|---|---|---|
| Smoking status | Pack-years | n | BMI | Prevalence of obesity (%) | P value† | Odds ratio* | 95% CI | P value |
| Current | ≤ 10 | 533 | 21.1±3.2 | 10.1 | 0.009 | 1.02 | 0.75–1.36 | 0.89 |
| 11–20 | 381 | 21.2±3.0 | 11 | 0.73 | 0.52–1.00 | 0.049 | ||
| 21–30 | 225 | 22.2±3.4 | 19.6 | 1.15 | 0.81–1.60 | 0.42 | ||
| 30 < | 176 | 22.7±3.8 | 24.4 | 1.3 | 0.91–1.83 | 0.15 | ||
| Past | ≤ 10 | 379 | 21.5±3.0 | 12.1 | 0.02 | 0.93 | 0.67–1.27 | 0.66 |
| 11–20 | 111 | 22.4±3.4 | 19.8 | 1.24 | 0.75–1.95 | 0.39 | ||
| 21–30 | 56 | 22.8±3.5 | 26.8 | 1.52 | 0.81–2.70 | 0.19 | ||
| 30 < | 64 | 23.8±3.9 | 34.4 | 1.92 | 1.12–3.20 | 0.02 | ||
*Prevalence of obesity of never smokers was used as the reference value.
BMI, body mass index
†Each P value was calculated by Cochran-Mantel-Haenszel trend test among groups stratified by pack-years in current or past smokers.