Table 3 Characteristics and dietary intakes of study subjects

Age (years) (Mean ± SD)

58 ± 10

57 ± 9

0.78

Male (n, %)

58 (57)

58 (57)

1

Urban (n, %)

72 (71)

73 (72)

0.88

Married (n, %)

100 (98)

97 (95)

0.25

Educational level (n, %)

0.95

 Primary school or below

32 (31)

30 (29)

 Secondary school

27 (26)

25 (25)

 High School

22 (22)

23 (23)

 College or above

21 (21)

24 (24)

Occupation (n, %)

0.74

 Administrator/other white-collar workers

20 (20)

17 (17)

 Blue-collar worker

21 (21)

25 (25)

 Farmer/others

61 (60)

60 (59)

Household income (Yuan/month) (n, %)

0.19

 < 2000

16 (16)

8 (8)

 2001–5000

25 (25)

36 (35)

 5001–8000

36 (35)

34 (33)

 ≥ 8001

25 (25)

24 (24)

BMI (kg/m²) (Mean ± SD)

23 ± 3

24 ± 3

0.42

First-degree relatives with cancer (n, %)

19 (19)

7 (7)

0.01

Smoking (n, %)

41 (40)

36 (35)

0.47

Regular drinking (n, %)

17 (17)

20 (20)

0.59

Occupational activity (n, %)

0.85

 Non-working

22 (22)

18 (18)

 Sedentary

30 (29)

30 (29)

 Light

25 (25)

25 (25)

 Moderate

14 (14)

13 (13)

 Heavy

11 (11)

16 (16)

Household and leisure activity

(MET-h/week) Median (P₂₅, P₇₅)

26 (7.5, 52)

26 (7.3, 52)

0.80

Total energy intake

(kcal/day) Median (P₂₅, P₇₅)

1510 (1140, 1750)

1420 (1200,1660)

0.80

Dietary fiber intake

(g/day) Median (P₂₅, P₇₅)

8.8 (6.8, 10)

8.7 (7.4, 10)

0.70

Red and processed meat intake

(g/day) Median (P₂₅, P₇₅)

103 (68, 150)

107 (84, 138)

0.58

Vegetables intake

(g/day) Median (P₂₅, P₇₅)

403 (289, 531)

429 (316, 530)

0.32

Fish intake

(g/day) Median (P₂₅, P₇₅)

93 (40, 144)

106 (52, 164)

0.21

Dietary Vitamin D intake

(IU/day) Median (P₂₅, P₇₅)

206 (79, 408)

238 (126, 502)

0.006