Table 1.
Baseline characteristics of study subjects.
| Characteristics | Cases (N = 209) | Controls (N = 294) | P value* |
|---|---|---|---|
| No. (%) | No. (%) | ||
| Age (years) | 0.331 | ||
| <60 | 106 (50.7) | 162 (55.1) | |
| ≥60 | 103 (49.3) | 132 (44.9) | |
| Sex | 0.076 | ||
| Male | 158 (75.6) | 201 (68.4) | |
| Female | 51 (24.4) | 93 (31.6) | |
| BMIa (kg/m2) | |||
| Mean ± SD | 22.4 ± 3.8 | 24.2 ± 3.3 | <0.001 |
| Smoking statusa | <0.001 | ||
| Never | 71 (34.1) | 154 (52.6) | |
| Ever | 137 (65.9) | 139 (47.4) | |
| Alcohol consumption | <0.001 | ||
| Nondrinkers | 85 (40.7) | 172 (58.5) | |
| Drinkers | 124 (59.3) | 122 (41.5) | |
| Family history of cancerab | <0.001 | ||
| No | 157 (77.0) | 280 (95.9) | |
| Yes | 47 (23.0) | 12 (4.1) | |
| TNM stagea | |||
| I | 14 (7.3) | ||
| II | 15 (7.8) | ||
| III | 142 (74.0) | ||
| IV | 21 (10.9) |
BMI: body mass index (weight/height2).
*P value from two-sample t tests and χ 2 tests.
aMissing data: BMI: 7; smoking: 2; family history of cancer: 7; tumor site: 17.
bFamily history of cancer: gastric, esophageal, liver, colorectal, and other cancers.