Table 1 Characteristics of 45,380 participants stratified by sex
From: Modifiable lifestyle factors have a larger contribution to colorectal neoplasms than family history
|  | Total (n = 45,380) | Male (n = 21,415) | Female (n = 23,965) |
|---|---|---|---|
Age at colonoscopy, years (%) | |||
  < 50 | 2896 (6.4) | 1469 (6.9) | 1427 (6.0) |
 50–60 | 11,597 (25.6) | 5054 (23.6) | 6543 (27.3) |
 60–70 | 21,403 (47.2) | 10,010 (46.7) | 11,393 (47.5) |
  ≥ 70 | 9484 (20.9) | 4882 (22.8) | 4602 (19.2) |
Educational level (%) | |||
 Low | 9166 (20.2) | 3784 (17.7) | 5382 (22.5) |
 Intermediate | 30,013 (66.1) | 14,224 (66.4) | 15,789 (65.9) |
 High | 6201 (13.7) | 3407 (15.9) | 2794 (11.7) |
Marital status (%) | |||
 Married | 43,468 (95.8) | 20,814 (97.2) | 22,654 (94.5) |
 Unmarried | 429 (0.9) | 218 (1.0) | 211 (0.9) |
 Divorced | 343 (0.8) | 128 (0.6) | 215 (0.9) |
 Widowed | 1140 (2.5) | 255 (1.2) | 885 (3.7) |
Smoking status (%) | |||
 Never | 35,007 (77.1) | 12,703 (59.3) | 22,304 (93.1) |
 Former | 1928 (4.2) | 1640 (7.7) | 288 (1.2) |
 Current | 8445 (18.6) | 7072 (33.0) | 1373 (5.7) |
  Cigarettes per day, mean (SD) | 16.01 (9.30) | 16.38 (9.51) | 14.06 (7.81) |
Alcohol consumption (%) | |||
 Never drinker | 40,699 (89.7) | 16,915 (79.0) | 23,784 (99.2) |
 Ever drinker | 4681 (10.3) | 4500 (21.0) | 181 (0.8) |
  Alcohol (g) consumed per dayb, mean (SD) | 38.98 (28.53) | 39.24 (24.77) | 31.53 (80.85) |
Physical activity (%) | |||
 Physical inactivity | 25,411 (56.0) | 11,636 (54.3) | 13,775 (57.5) |
 Regular activity | 19,969 (44.0) | 9779 (45.7) | 10,190 (42.5) |
BMI, kg/m2 (%) | |||
  < 25 | 26,124 (57.6) | 11,865 (55.4) | 14,259 (59.5) |
 25–29.9 | 16,414 (36.2) | 8319 (38.8) | 8095 (33.8) |
  ≥ 30 | 2842 (6.3) | 1231 (5.7) | 1611 (6.7) |
Colonoscopy findings (%) | |||
 Normal | 24,176 (53.3) | 9501 (44.4) | 14,675 (61.2) |
 Nonadvanced CRN | 17,823 (39.3) | 9788 (45.7) | 8035 (33.5) |
 Advanced CRN | 3381 (7.5) | 2126 (9.9) | 1255 (5.2) |
  Advanced adenoma | 2688 (79.5) | 1714 (80.6) | 974 (77.6) |
  CRC | 693 (20.5) | 412 (19.4) | 281 (22.4) |
Family history of CRC in FDR (%) | |||
 No | 41,820 (92.2) | 19,863 (92.8) | 21,957 (91.6) |
 Yes | 3560 (7.8) | 1552 (7.2) | 2008 (8.4) |
Tumor locationa (%) | |||
 Colon | 14,524 (68.5) | 7964 (66.8) | 6560 (70.6) |
 Rectum | 2867 (13.5) | 1494 (12.5) | 1373 (14.8) |
 Unspecific | 3813 (18.0) | 2456 (20.6) | 1357 (14.6) |