Table 1 Demographic characteristics of case-control study population
From: The genetic polymorphisms of HER-2 and the risk of lung cancer in a Korean population
Characteristics | Controls | Cases | p-value |
|---|---|---|---|
1. Age | n = 407 | n = 407 | Â |
   Median age | 60.8 | 60.8 |  |
   Range | 30 – 84 | 30 – 78 |  |
2. Gender, n, (%) | n = 407, (%) | n = 407, (%) | Â |
   Male | 302, (74.2) | 303, (74.5) | 0.94 |
   Female | 105, (25.8) | 104, (25.6) |  |
3. Smoking status, n, (%) | n = 309, (%) | n = 396, (%) | Â |
   Non-smoker | 162, (52.4) | 108, (27.3) | <0.0001 |
   Smoker | 147, (47.6) | 288, (72.7) |  |
4. Drinking status, n, (%) | n = 224, (%) | n = 310, (%) | Â |
   Non-drinker | 78, (34.8) | 118, (38.1) | 0.44 |
   Drinker | 146, (65.2) | 192, (61.9) |  |
5. Histological cell type, n, (%) | Â | N = 388, (%) | Â |
   Adenocarcinoma |  | 157, (40.5) |  |
   Squamous cell |  | 123, (31.7) |  |
   Small cell |  | 79, (20.4) |  |
   Other carcinomaa |  | 29, (7.5) |  |