Presence of colorectal tumor n (%)

Absence of colorectal tumor n (%)

Total

n

OR (95% CI)

p-value

Adjusted OR (95% CI)

Adjusted p-value

Age ≥ 50 years

47 (10.9)

385 (89.1)

432

1.141 (0.688 - 1.891)

0.607

Male

33 (8.0)

378 (92.0)

411

0.566 (0.349 - 0.919)

0.021

0.630 (0.368 - 1.080)

0.093

Complete colonoscopy

32 (5.8)

519 (92.4)

551

0.184 (0.111 - 0.302)

<0.001

0.167 (0.096 - 0.289)

<0.001

Screening

Positive hemocult

1 (10.0)

9 (90.0)

10

0.959 (0.120 - 7.677)

1.000

Family history of colorectal cancer

0 (0)

6 (100)

6

/

1.000

Surveillance

Colorectal cancer surveillance

5 (23.8)

16 (76.2)

21

2.822 (1.003 - 7.939)

0.057

4.783 (1.536 - 14.893)

0.007

Polyp monitoring

0 (0)

8 (100)

8

/

1.000

Surveillance of ulcerative colitis

0 (0)

7 (100.0)

7

/

1.000

Symptom evaluation

Rectorrhagia

25 (11.9)

185 (88.1)

210

1.252 (0.751 - 2.087)

0.393

Abdominal pain

15 (8.0)

173 (92.0)

188

0.685 (0.378 - 1.239)

0.197

Constipation

11 (8.7)

116 (91.3)

127

0.787 (0.402 - 1.540)

0.475

Iron deficiency anemia

5 (8.6)

53 (91.4)

58

0.801(0.310 - 2.072)

0.639

Emaciation

14 (25.0)

42 (75.0)

56

3.317 (1.713 - 6.421)

0.001

5.143 (2.450 - 10.797)

<0.001

Diarrhea

6 (15.4)

33 (84.6)

39

1.620 (0.655 - 4.006)

0.280

Abdominal or rectal mass

14 (45.2)

17 (54.8)

31

8.537 (4.011 - 18.170)

<0.001

13.390 (5.684 - 31.544)

<0.001

Alternating diarrhea constipation

1 (5.0)

19 (95.0)

20

0.447 (0.059 - 3.388)

0.711

Proctalgia

2 (10.0)

18 (90.0)

20

0.958 (0.218 - 4.215)

1.000

Melena

1 (7.7)

12 (92.3)

13

0.716 (0.092 - 5.584)

1.000