Table 4.
Probability of progression in smokers versus non-smokers
| ALL | Non-Smokera | Smokerb | P value | |
|---|---|---|---|---|
| Total | 445 | 139 | 306 | |
| Probability of Progression† | ||||
| 3-year (95% CI) | 12.7 (9.8 – 15.6) | 5.5 (4.1 – 6.9) | .02 | |
| 5-year (95% Ci) | 16.6 (13.2 – 20) | 10.1 (8.1 – 12.8) | ||
a
Non-smoker was defined as less than 100 cigarettes in life time
b
Smoker was defined as consumption of more than 100 cigarettes in life time
†
Progression defined as progression to severe dysplasia, carcinoma in-situ, squamous cell carcinoma