Table 2. Logistic regression coefficients between smoking and heart disease.
| Variables | Model 1 | Model 2 | Model 3 | |||||
|---|---|---|---|---|---|---|---|---|
| aOR (95% CI) | P value | aOR (95% CI) | P value | aOR (95% CI) | P value | |||
| Smoking (yes/no) | 1.27 (1.10–1.46) | 0.001 | 1.29 (1.10–1.50) | 0.001 | 1.35 (1.11–1.66) | 0.003 | ||
| Smoking status (current/former) | 0.57 (0.47–0.70) | <0.001 | 0.59 (0.48–0.73) | <0.001 | 0.78 (0.61–0.99) | 0.042 | ||
| Smoking status (former/never) | 1.26 (1.09–1.46) | 0.002 | 1.27 (1.08–1.48) | 0.003 | 1.31 (1.07–1.60) | 0.010 | ||
| Frequency (pack-year) | 1.01(1.00–1.01) | 0.018 | 1.01 (1.00–1.02) | 0.011 | 1.02 (1.00–1.03) | 0.008 | ||
| The time to first cigarette (1/2/3/4) | 0.93 (0.83–1.05) | 0.228 | 0.91 (0.80–1.03) | 0.121 | 0.88 (0.80–1.06) | 0.254 | ||
| Nicotine dependence (high/low) | 0.87 (0.65–1.16) | 0.335 | 0.81 (0.59–1.10) | 0.168 | 0.78 (0.41–1.47) | 0.436 | ||
| Secondhand smoke exposure (yes/no) | 1.22 (1.09–1.38) | 0.001 | 1.14 (1.00–1.29) | 0.043 | 0.99 (0.84–1.17) | 0.933 | ||
Model 1: adjusted for age and sex. Model 2: Model 1 adjusted for BMI, history of diabetes and hypertension. Model 3: Model 2 adjusted for residency area, drinking status and exercise status. The time to first cigarette: 1: <5 minutes; 2: 6–30 minutes; 3: 31–60 minutes; 4: >60 minutes. aOR, adjusted odd ratio; CI, confidence intervals; BMI, body mass index.