Table 4. Hazard ratios for polyp recurrence, according to baseline patient and polyp characteristics (553 followed up participants).
| Univariate analysis* | Multivariate analysis | |||||
| Characteristic | Hazard ratio | 95% CI | P value | Hazard ratio | 95% CI | P value |
| Gender | ||||||
| female | 1 | reference | 1 | reference | ||
| male | 0.61 | 0.47 to 0.80 | <10−3 | 0.76 | 0.56 to 1.04 | 0.09 |
| Aspirin use | ||||||
| no | 1 | reference | 1 | reference | ||
| yes | 1.44 | 0.92 to 2.24 | 0.11 | 1.10 | 0.65 to 1.87 | 0.72 |
| Smoking status | ||||||
| never | 1 | reference | 1 | reference | ||
| former | 1.33 | 0.97 to 1.83 | 0.07 | 1.10 | 0.77 to 1.56 | 0.60 |
| current | 1.35 | 0.95 to 1.91 | 0.10 | 1.45 | 0.99 to 2.14 | 0.06 |
| Body mass index (per 5 kg/m2) | 1.22 | 1.04 to 1.42 | 0.02 | 1.16 | 0.98 to 1.37 | 0.09 |
| Number (per 1 increase) | 1.18 | 1.07 to 1.30 | <10−3 | 1.19 | 1.06 to 1.33 | <10−2 |
*
variables that had a p value<0.20.