Table 1. The demographic and lifestyle-related characteristics between the colorectal cancer cases and controls.
| Stage 1 | Stage 2 | Combined stage a | P | ||||
|---|---|---|---|---|---|---|---|
| Case (n = 320) | Control (n = 319) | Case (n = 501) | Control (n = 538) | Case (n = 821) | Control (n = 857) | ||
| Age (mean ± SD) | 65.76±10.23 | 65.30±9.76 | 62.73±10.99 | 62.26±10.53 | 63.91±10.79 | 63.39±10.35 | 0.316 |
| Gender, N (%) | |||||||
| Male | 168 (52.50) | 157 (49.22) | 262 (52.30) | 285 (52.97) | 430 (52.38) | 442 (51.58) | 0.743 |
| Female | 152 (47.50) | 162 (50.78) | 239 (47.70) | 253 (47.03) | 391 (47.62) | 415 (48.42) | |
| BMI, N (%) | |||||||
| <18.5 | 27 (8.44) | 17 (5.33) | 47 (9.38) | 46 (8.55) | 74 (9.01) | 63 (7.35) | 0.239 |
| 18.5∼23.9 | 216 (67.50) | 201 (63.01) | 339 (67.66) | 363 (67.47) | 555 (67.72) | 564 (65.93) | |
| 24∼27.9 | 61 (19.06) | 85 (26.65) | 99 (19.76) | 113 (21.00) | 160 (19.37) | 198 (23.10) | |
| ≥28 | 16 (5.00) | 16 (5.02) | 16 (3.19) | 16 (2.97) | 32 (3.90) | 32 (3.62) | |
| Family history of cancer, N (%) | |||||||
| No | 257 (80.31) | 287 (89.97) | 394 (78.64) | 450 (83.64) | 651 (79.29) | 737 (86.00) | <0.001 |
| Yes | 63 (19.69) | 30 (9.40) | 107 (21.36) | 88 (16.36) | 170 (20.71) | 118 (13.77) | |
| Smoking, N (%) | |||||||
| No | 208 (65.00) | 220 (68.97) | 316 (63.07) | 330 (61.34) | 524 (63.82) | 550 (64.18) | 0.882 |
| Yes | 112 (35.00) | 99 (31.03) | 183 (36.53) | 206 (38.29) | 295 (35.93) | 305 (35.59) | |
| Alcohol drinking, N (%) | |||||||
| No | 247 (77.19) | 248 (77.74) | 359 (71.66) | 386 (71.75) | 606 (73.81) | 634 (73.98) | 0.783 |
| Yes | 72 (22.50) | 68 (21.32) | 138 (27.54) | 145 (26.95) | 210 (25.58) | 213 (24.85) | |
| Tea drinking, N (%) | |||||||
| No | 200 (62.50) | 193 (60.50) | 294 (58.68) | 273 (50.74) | 494 (60.17) | 466 (54.38) | 0.016 |
| Yes | 120 (37.50) | 126 (39.50) | 201 (40.12) | 259 (48.14) | 321 (39.10) | 385 (44.92) | |
| Tumor site | |||||||
| Colon | 157 (49.06) | 244 (48.70) | 401 (48.84) | ||||
| Rectal | 163 (50.94) | 257 (51.30) | 420 (51.16) | ||||
SD, standard deviation; BMI, body mass index; N, number
a Combine Stage 1 and Stage 2 as the combined stage