Table 2 Characteristics of study subjects

Age(n,%)

44.29 (9.12)

45.43(8.45)

42.02(8.23)

 < 30

8(3.35)

4(2.53)

4(4.94)

30–40

69(28.87)

43(27.22)

26(32.10)

40–50

100(41.84)

67(42.41)

33(40.74)

50–60

44(18.41)

32(20.25)

12(14.81)

 ≥ 60

18(7.53)

12(7.59)

6(7.41)

Education(n,%)

Missing

66(27.62)

44(27.85)

22(27.16)

High school

89(37.24)

62(39.24)

27(33.33)

College school

78(32.64)

48(30.38)

30(37.04)

Graduate school

6(2.51)

4(2.53)

2(2.47)

Monthly Income(RMB,n,%)

Missing

89(37.24)

52(32.91)

37(45.68)

 ≤ 3000

26(10.88)

14(8.86)

12(14.81)

3000–6000

58(24.27)

39(24.68)

19(23.46)

6000–10,000

34(14.23)

29(18.35)

5(6.17)

 ≥ 10,000

32(13.39)

24(15.19)

8(9.88)

Family status(n,%)

Single

40(16.84)

26(16.46)

14(17.28)

Co-habiting

199(83.26)

132(83.54)

67(82.72)

Employment status(n,%)

Employed

182(76.15)

135(85.44)

47(58.02)

Not Employed

57(23.85)

23(14.56)

34(41.98)

Change in body weight in past 3 month(n,%)

Change

69(28.87)

36(22.78)

33(40.74)

No change

170(71.13)

122(77.22)

48(59.26)

Smoke(n,%)

Yes

84(35.15)

76(48.10)

8(9.88)

No

155(64.85)

82(51.90)

73(90.12)

Dietary structure(n,%)

Meat and vegetables mixed

192(80.33)

131(82.91)

61(75.31)

Meat based

26(10.88)

21(13.29)

5(25.93)

Vegetables based

21(8.79)

6(3.80)

15(18.52)

Breakfast frequency (per week, n,%)

 ≥ 5 time

173(72.38)

127(80.38)

46(56.79)

3–4 time

35(14.64)

18(11.39)

17(20.99)

1–2 time

22(9.21)

8(5.06)

14(17.28)

None

9(3.77)

5(3.16)

4(4.94)

Dining out frequency (per week, n,%)

 ≥ 5 time

38(15.90)

27(17.09)

11(13.58)

3–4 time

61(25.52)

51(32.28)

10(12.35)

1–2 time

128(53.56)

77(48.73)

51(62.96)

None

12(5.02)

3(1.90)

9(11.11)