Table 1 Distribution of the HCC cases and matched controls by smoking habits, smoking period and smoking average number
Anti-HCV positive group | Anti-HCV negative group | |||
|---|---|---|---|---|
Case (%) | Control (%) | Control (%) | Case (%) | |
Smoking habits | ||||
Never smoker | 13 (22.4) | 241 (56.0) | 16 (44.4) | 1712 (58.9) |
Ex smoker | 8 (13.8) | 54 (12.6) | 5 (13.9) | 378 (13.0) |
Current smoker | 30 (51.7) | 116 (27.0) | 15 (41.7) | 688 (23.7) |
Unknown | 7 (12.1) | 19 (4.4) | 0 (0.0) | 129 (4.4) |
Total | 58 (100.0) | 430 (100.0) | 36 (100.0) | 2907 (100.0) |
Smoking period (year) | ||||
Never smoker | 13 (27.1) | 241 (60.9) | 16 (44.4) | 1712 (63.0) |
<35 | 13 (27.1) | 54 (13.6) | 6 (16.7) | 467 (17.2) |
35 or more | 22 (45.8) | 101 (25.5) | 14 (38.9) | 538 (19.8) |
Total | 48 (100.0) | 396 (100.0) | 36 (100.0) | 2717 (100.0) |
Smoking average number (cig/day) | ||||
Never smoker | 13 (26.5) | 241 (59.2) | 16 (45.7) | 1712 (62.2) |
<10 | 0 (0.0) | 13 (3.2) | 1 (2.9) | 85 (3.1) |
10 to 19 | 13 (26.5) | 49 (12.0) | 6 (17.1) | 336 (12.2) |
20 or more | 23 (47.0) | 104 (25.6) | 12 (34.3) | 618 (22.5) |
Total | 49 (100.0) | 407 (100.0) | 35 (100.0) | 2751 (100.0) |
