Table 1.
Baseline characteristics of the colorectal cancer cases and matched controls from the Shanghai Men’s Health Study
| Colorectal cancer cases | Matched controls | p value | |
|---|---|---|---|
| Number of subjects | 340 | 673 | |
| Age | |||
| < 55 years | 22.4% | 21.4% | 0.2106 |
| 55 – 59 years | 10.9% | 11.6% | |
| 60 – 64 years | 15.6% | 14.6% | |
| 65 – 69 years | 23.5% | 23.5% | |
| ≥ 70 years | 27.6% | 29.0% | |
| Educational level (%) | |||
| ≤ Elementary school | 12.4% | 14.9% | 0.5244 |
| Middle school | 33.8% | 31.6% | |
| High school | 25.9% | 27.6% | |
| ≥ College | 27.9% | 25.9% | |
| Annual per capita family income (%) | |||
| < 6,000 yuan | 5.3% | 10.0% | 0.0561 |
| 6,000 – 11,999 yuan | 48.5% | 45.5% | |
| 12,000 – 23,999 yuan | 37.1% | 37.6% | |
| ≥ 24,000 yuan | 9.1% | 7.0% | |
| Occupation | |||
| Professional | 35.6% | 37.4% | 0.4410 |
| Clerical | 20.6% | 17.1% | |
| Manual worker | 43.8% | 45.5% | |
| Cigarette smoking (%) | |||
| Never | 37.1% | 38.9% | 0.1816 |
| Past | 16.2% | 19.3% | |
| Current | 46.8% | 41.8% | |
| Alcohol consumption (%) | |||
| Never | 68.2% | 68.4% | 0.9219 |
| Ever | 31.8% | 31.6% | |
| BMI (kg/m2) | 24.4 ± 3.4 | 23.8 ± 3.1 | 0.0077 |
| Leisure time physical activity (MET hours/day) | 1.7 ± 2.7 | 1.7 ± 2.7 | 0.5124 |
| Total energy intake (Kcal/day) | 1913.7 ± 440.6 | 1849.1 ± 446.4 | 0.0289 |
| Red meat intake (g/day) | 57.5 ± 36.4 | 55.7 ± 42.3 | 0.4995 |
| Total meat intake (g/day) | 122.6 ± 69.3 | 115.7 ± 75.8 | 0.1327 |
| History of diabetes (%) | 11.2% | 9.2% | 0.3226 |
| Family history of cancer (%) | 37.9% | 28.8% | 0.0031 |
Continuous variables are presented as mean ± standard deviation.