Table 1 Baseline demographics of study characteristics
From: Matrix metalloproteinase-9gene polymorphisms in nasal polyposis
Characteristic | Cases (n = 203) | Control (n = 730) |
|---|---|---|
Age, mean (SD) | 43.8 (16.5) | 54.4 (11.9) |
Sex (male to female ratio) | 137/66 (2.1:1) | 299/420 (1:1.4) |
Smoker | 39 (19.2%) | 130 (17.8%) |
Nasal polyposis recurrence, No.(%) | Â | Â |
   Yes | 64 (31.5%) |  |
   No | 139 (68.5%) |  |