Table 1 Characteristics of Participants in the Tianjin Colorectal Cancer Screening Program, 2012–2020

Age (years), mean (SD)

60.80 (8.35)

63.51 (7.59)

 < 0.001

40–44

74,832 (1.8)

1456 (0.7)

 < 0.001

45–49

384,721 (9.3)

9521 (4.4)

50–54

600,919 (14.6)

19,817 (9.1)

55–59

732,385 (17.8)

33,446 (15.4)

60–64

735,745 (17.9)

41,960 (19.3)

65–69

866,164 (21.0)

56,502 (26.0)

70–74

723,131 (17.6)

54,462 (25.1)

Sex, n (%)

Male

1,927,100 (46.8)

89,371 (41.2)

 < 0.001

Female

2,190,797 (53.2)

127,793 (58.8)

Marital status, n (%)

Married

3,929,779 (95.4)

181,399 (83.5)

 < 0.001

Unmarried

47,734 (1.2)

1826 (0.8)

Divorced

29,129 (0.7)

5740 (2.6)

Widowed

91,535 (2.2)

27,966 (12.9)

Unknown

19,720 (0.5)

233 (0.1)

Educational level, n (%)

Primary school or below

1,046,679 (25.4)

62,378 (28.7)

 < 0.001

Middle school

2,615,698 (63.5)

134,673 (62.0)

College or above

411,378 (10.0)

19,454 (9.0)

Unknown

44,142 (1.1)

659 (0.3)

Factors for risk stratification, n (%)

Chronic diarrhoea

116,248 (2.8)

44,888 (20.7)

 < 0.001

Chronic constipation

185,216 (4.5)

56,691 (26.1)

 < 0.001

Mucus bloody stool

40,839 (1.0)

26,900 (12.4)

 < 0.001

Chronic appendicitis/appendectomy

76,864 (1.9)

27,485 (12.7)

 < 0.001

Chronic cholecystitis/cholecystectomy

61,156 (1.5)

24,808 (11.4)

 < 0.001

Psychiatric trauma

132,984 (3.2)

48,719 (22.4)

 < 0.001

Personal history of any cancer

12,192 (0.3)

12,192 (5.6)

 < 0.001

Personal history of colorectal polyps

11,618 (0.3)

11,618 (5.3)

 < 0.001

Family history of CRC in FDR

21,415 (0.5)

21,415 (9.9)

 < 0.001

FIT positive

88,459 (2.1)

88,459 (40.7)

 < 0.001