Table 1 Distribution of CFTND scores for daily smokers by background characteristics (n = 894)

< 20

20

2.10

1.80

20-29

236

2.88

2.22

11.98

< 0.01

30-39

345

3.35

2.17

40+

293

3.95

2.47

Gender

male

869

3.41

2.32

1.47

> 0.05

female

25

2.84

2.19

Educational attainment

elementary or lower

134

3.61

2.26

junior high school

483

3.53

2.38

3.00

< 0.05

high school

223

3.05

2.23

college or higher

54

3.07

2.07

Marital status

never married

201

3.00

2.28

married

663

3.50

2.33

3.91

< 0.05

divorced/widowed

30

3.73

2.12

Work type

construction

426

3.62

2.29

factory

288

3.28

2.34

4.62

< 0.05

service

180

3.03

2.30

Personal income (RMB)/month

< 500 RMB

32

3.56

2.14

500-499

131

3.34

2.32

1000-1999

478

3.49

2.33

1.11

> 0.05

2000-2999

190

3.10

2.28

> = 3000

63

3.54

2.40

Region of origin

south-east

227

3.15

2.33

south-west

569

3.51

2.31

2.07

> 0.05

Other

98

3.31

2.34

Registered residential status

rural

726

3.43

2.32

1.16

> 0.05

urban

168

3.22

2.28

Age at first migration

< 20

268

2.95

2.26

20-29

345

3.45

2.28

5.67

< 0.01

30-39

224

3.73

2.28

40+

57

3.83

2.61

Length of migration (years)

< 5

273

3.14

2.22

5-9

289

3.28

2.37

4.22

< 0.01

10-14

180

3.51

2.22

15+

152

3.93

2.42

Numbers of cities of migration

1

263

3.35

2.39

2

304

3.15

2.30

3.57

< 0.05

3

146

3.40

2.16

4+

181

3.86

2.33

Type of city housing

collective dormitory

452

3.35

2.43

room rented by self

251

3.58

2.17

room rented by self and other family members

133

3.37

2.29

0.97

> 0.05

room owned by self

44

3.20

2.14

other

17

2.65

2.00