Table 4 The association between factors and the presence of colorectal polyps among participants of the PERSIAN Guilan cohort study (PGCS)

Relationship

Son-Daughter

46 / 125

36.8

1

Sister-Bother

10 / 37

27.0

1.57 (0.70–3.54)

0.275

Age group

40–50 y

7 / 38

18.4

1

1

50–60 y

23 / 75

30.7

1.96 (0.75–5.09)

0.168

1.30 (0.47–3.64)

0.613

>60 y

26 / 49

53.1

5.01 (1.85–13.52)

0.001

3.29 (1.13–9.56)

0.029

Sex

Male

34 / 87

39.1

1.55 (0.80–2.98)

0.195

Female

22 / 75

29.3

1

Marital Status

Married

45 / 124

36.3

1

Single

4 / 9

44.4

1.40 (0.36–5.50)

0.626

Widowed/

7 / 29

24.1

0.56 (0.22–1.41)

0.218

Education

Illiterate

18 / 39

46.2

1.76 (0.76–4.05)

0.185

Under diploma

19 / 65

29.2

0.85 (0.39–1.82)

0.673

Diploma and higher

19 / 85

32.8

1

Occupation

Farmer

11 / 23

47.8

1

Employee

13 / 37

35.1

0.59 (0.20–1.71)

0.331

Others

13 / 44

29.5

0.46 (0.16–1.30)

0.142

Housekeeper

19 / 58

32.8

0.53 (0.20–1.42)

0.208

Place of residency

Urban

39 / 112

34.8

1

Rural

17 / 50

34.0

0.96 (0.48–1.95)

0.919

BMI (kg/m²)

Normal

5 / 27

18.5

1

1

Overweight/Obese

51 / 135

37.8

2.67 (0.95–7.49)

0.062

2.74 (0.89–8.47)

0.080

Smoking

No

33 / 117

28.2

1

1

Yes

23 / 45

51.1

2.66 (1.31–5.41)

0.007

2.73 (1.24–6.02)

0.013

Opium Consumption

No

47 / 138

34.1

1

Yes

9 / 24

37.5

1.16 (0.47–2.85)

0.744

Alcohol Consumption

No

52 / 152

34.2

1

Yes

4 / 10

40.0

1.28 (0.35–4.75)

0.710

Hypertension

No

43 / 139

30.9

1

Yes

13 / 23

56.5

2.90 (1.18–7.13)

0.020

Diabetes

No

52 / 154

33.8

1

Yes

4 / 8

50.0

1.96 (0.47–8.16)

0.354

Hyperlipidemia

No

47 / 143

32.9

1

Yes

9 / 19

47.4

1.84 (0.70–4.83)

0.217

Constipation

No

40

32.5

1

1

Yes

16

41.0

1.44 (0.69–3.03)

0.332

2.11 (0.90–4.93)

0.086

Anorectal Compliant

No

40 / 127

31.5

1

Yes

16 / 35

45.7

1.83 (0.85–3.93)

0.120

Dairy (daily/promise)

< 2

34 / 93

36.6

1

≥ 2

22 / 69

31.9

0.81 (0.42–1.57)

0.536

Meat (daily/promise)

< 2

22 / 65

33.8

1

≥ 2

34 / 97

35.1

1.05 (0.54–2.04)

0.874

Bread (daily/promise)

< 6

4 / 10

40.0

1

≥ 6

52 / 152

34.2

0.78 (0.21–2.89)

0.710

Vegetables (daily/promise)

< 3

45 / 107

42.1

1

1

≥ 3

11 / 55

20.0

0.34 (0.16–0.74)

0.006

0.43 (0.19–0.98)

0.045

Fruits (daily/promise)

< 2

32 / 67

47.8

1

1

≥ 2

24 / 95

25.3

0.37 (0.19–0.72)

0.003

0.49 (0.23–1.06)

0.069