Table 1.
Characteristics of Participants in the Training and Validation Sets
| Training Set (n = 7752) | Validation Set (n = 3324) | P value | |
|---|---|---|---|
| Age (year),mean (SD) | 60.28 (6.34) | 60.15 (6.41) | 0.29 |
| Sex, n (%) | 0.44 | ||
| Female | 3931 (50.71) | 1712 (51.50) | |
| Male | 3821 (49.29) | 1612 (48.50) | |
| BMI (kg/m2), n (%) | 23.88 (3.03) | 23.90 (2.99) | 0.62 |
| 18.5 ≤ BMI < 24 | 2876 (50.99) | 1191 (50.17) | |
| BMI < 18.5 | 146 (2.59) | 60 (2.53) | |
| 24 ≤ BMI < 28 | 2128 (37.73) | 930 (39.17) | |
| BMI ≥ 28 | 490 (8.69) | 193 (8.13) | |
| Family history of CRC in first-degree relatives, n (%) | 258 (3.34) | 114 (3.44) | 0.78 |
| Smokinga, n (%) | 2636 (34.00) | 1089 (32.81) | 0.23 |
| Alcoholb, n (%) | 1694 (21.86) | 721 (21.75) | 0.90 |
| Regular intake of fatty foodc, n (%) | 1670 (22.05) | 725 (22.42) | 0.67 |
| Regular intake of fried foodd, n (%) | 522 (7.04) | 231 (7.28) | 0.68 |
| Regular intake of pickled foode, n (%) | 1835 (24.30) | 762 (23.70) | 0.52 |
| Regular moderate-to-intensity physical activityf, n (%) | 5678 (81.84) | 1936 (81.07) | 0.41 |
| Early colorectal neoplasm, n (%) | 0.05 | ||
| Adenomas | 1122 (14.47) | 493 (14.83) | |
| Stage 0–I colorectal cancer | 170 (2.19) | 61 (1.84) |
Notes: aSmoking status was classified as smokers (current/ever) or non-smoker. bAlcohol drinking status was classified as drinkers (current/ever) or non-drinker. cRegular intake of fatty meat means the intake 3–7 days per week dRegular intake of fried food means the intake 3–7 days per week. eRegular intake of pickled food means the intake 3–7 days per week. fRegular moderate-to-intensity physical activity means at least 1 day per week.
Abbreviations: BMI, body mass index; SD, standard deviation; CRC, colorectal cancer.