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Table 1 General characteristics at the first change time point (2008 → 2009)

From: The effect of depression status change on daily cigarette smoking amount according to sex: an eleven-year follow up study of the Korea Welfare Panel Study

Variables

Daily cigarette smoking amount (DCA)

Male

P value

Female

P value

N

%

MEANS

±

SD

N

%

MEANS

±

SD

TOTAL

1645

100

17.74

±

8.30

 

176

100

11.32

±

6.72

 

Change of depression status (2008 → 2009)

 No → No

1429

86.9

17.80

±

8.34

0.2428

113

64.2

10.54

±

6.15

0.0764

 No → Yes

82

5.0

18.60

±

9.88

 

26

14.8

11.15

±

6.73

 

 Yes → No

90

5.5

16.40

±

6.29

 

19

10.8

13.95

±

8.48

 

 Yes → Yes

44

2.7

16.82

±

7.30

 

18

10.2

13.67

±

7.44

 

Age at the smoking initiation (years)

 Under than 19

529

32.2

19.11

±

8.82

<.0001

19

10.8

8.11

±

4.92

0.2523

 19 or older

1116

67.8

17.09

±

7.96

 

157

89.2

11.71

±

6.82

 

Age (years)

 19–29

150

9.1

15.03

±

6.31

<.0001

10

5.7

7.00

±

2.87

0.0671

 30–39

421

25.6

17.71

±

7.84

 

10

5.7

9.00

±

6.62

 

 40–49

383

23.3

19.77

±

8.45

 

24

13.6

11.46

±

6.21

 

 50–59

279

17.0

19.36

±

8.90

 

26

14.8

12.88

±

7.94

 

 60–69

238

14.5

17.04

±

8.52

 

30

17.0

13.57

±

7.31

 

  ≥ 70

174

10.6

14.01

±

7.24

 

76

43.2

10.72

±

6.27

 

Region

 Metropolitan

669

40.7

17.39

±

7.92

0.0186

76

43.2

11.12

±

6.91

0.3972

 Rural

976

59.3

17.97

±

8.55

 

100

56.8

11.47

±

6.61

 

Education level

 Middle school or under

587

35.7

17.64

±

8.12

0.0172

134

76.1

11.51

±

6.24

0.4203

 High school

846

51.4

18.17

±

8.54

 

33

18.8

11.18

±

6.91

 

 College or above

212

12.9

16.28

±

7.68

 

9

5.1

9.00

±

12.04

 

Marriage status

 Living w spouse

1165

70.8

18.02

±

8.35

0.2954

40

22.7

10.08

±

5.44

0.0532

 Living w/o spouse

480

29.2

17.04

±

8.15

 

136

77.3

11.68

±

7.03

 

Income level

 Low

405

24.6

16.45

±

7.67

0.0238

70

39.8

11.50

±

6.52

0.4305

 Lower middle

446

27.1

18.30

±

7.99

 

47

26.7

12.89

±

7.36

 

 Upper middle

428

26.0

17.81

±

8.11

 

38

21.6

10.03

±

6.06

 

 High

366

22.2

18.38

±

9.38

 

21

11.9

9.52

±

6.61

 

Alcohol consumption

 Non-drinkers

311

18.9

17.77

±

7.61

0.0003

91

51.7

12.30

±

7.13

0.6671

 Once a week or less

594

36.1

17.33

±

8.01

 

60

34.1

10.52

±

6.48

 

 2–3 times a week

408

24.8

17.03

±

7.97

 

14

8.0

9.93

±

4.92

 

 More than 4 times a week

332

20.2

19.31

±

9.57

 

11

6.3

9.36

±

5.95

 

Chronic diseases

 No

976

59.3

17.98

±

8.24

0.5129

53

30.1

10.23

±

6.19

0.7133

 Yes

669

40.7

17.38

±

8.39

 

123

69.9

11.79

±

6.91