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NSAIDs: nonsteroidal anti-inflammatory drugs; SD: standard deviation
| Parameter | Group I (n = 48) | Group II (n = 48) | P-value |
| Age in years, mean ±SD | 46.5 ±2 | 47.3 ±2 | - |
| Sex ratio (male-to-female) | 15:1 | 3.8:1 | - |
| Smoking, n (%) | 22 (45.8) | 8 (16.7) | 0.002 |
| Alcohol intake, n (%) | 27 (56.3) | 12 (25) | 0.002 |
| NSAIDs intake, n (%) | 26 (54.2) | 24 (50) | 0.68 |
