Table 4 Risk factors for current and heavy smoking in men only: percentages, unadjusted and adjusted odds ratios with 95% confidence intervals.

Residence

Urban

58

1.13

0.009

1.17

0.005

18

1.78 (1.66, 1.9)

<0.0001

1.49

<0.0001

Rural

64

1.01,1.2

1.1,1.3

50

1.29,1.75

Migr't

51

28

Age

<30

55

1.27

<0.0001

1.12

0.08

12

4.2 (3.5,5.0)

<0.0001

3.82

<0.0001

>30

61

1.1,1.4

0.98,1.2

38

3.24,4.52

Education

Low

58

1.0

0.5

0.9

0.6

31

2.2 (2,2.5)

<0.0001

1.26

0.008

High

59

0.9,1.2

0.8,1.1

17

1.05, 1.49

Marital status

Ever

61

1.3

<0.0001

0.89

0.14

34

1.3 (1.2,1.4)

<0.0001

1.1

0.06

Never

55

1.1,1.5

0.77,1.03

26

1.0,1.2

Children

Yes

61

0.8

<0.0001

1.17

0.04

35

1.4 (1.2,1.6)

<0.0001

1.2

0.05

No

54

0.7,0.9

1.0,1.36

24

1.06,1.2

Drinking

Yes

68

0.44

<0.0001

0.14

<0.001

32

0.53 (0.4, 0.6)

<0.0001

0.2

<0.0001

No

48

0.4,0.51

0.13,0.16

20

0.18,0.24

Personal Income RMB/month

<900

55

1.3

<0.0001

1.2

0.07

20

1.3 (1.2,1.6)

<0.0001

1.8

<0.0001

>900

61

1.1,1.5

1.0,1.3

26

1.5,2.1