Table 1 Characteristics of participants included in the discovery genome-wide association study (GWAS) on colorectal cancer risk
Characteristics | Case (N = 500) | Control (N = 1,500) | P-valuea |
|---|---|---|---|
N (%) | N (%) | ||
Age (year) | 0.954 | ||
Mean (SD) | 63.0 (7.15) | 62.9 (7.07) | |
Sex | > 0.999 | ||
Male | 250 (50.0%) | 750 (50.0%) | |
Female | 250 (50.0%) | 750 (50.0%) | |
BMI (kg/m2) | 0.002 | ||
Underweight (BMI < 18.5) | 23 (4.6%) | 24 (1.6%) | |
Normal (18.0 ≤ BMI < 23.0) | 173 (34.6%) | 545 (36.3%) | |
Overweight (23.0 ≤ BMI < 25.0) | 135 (27.0%) | 411 (27.4%) | |
Obese (25.0 ≤ BMI) | 169 (33.8%) | 519 (34.6%) | |
Unknown | 0 (0%) | 1 (0.1%) | |
Smoking history | 0.226 | ||
Never | 339 (67.8%) | 1092 (72.8%) | |
Ever | 161 (31.2%) | 438 (29.2%) | |
Drinking history | 0.394 | ||
Never | 265 (53.0%) | 760 (50.7%) | |
Ever | 235 (47.0%) | 740 (49.3%) |