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Table 1 General characteristics of the study population with and without depression (n = 20,084)

From: Association of smoking status, cumulative smoking, duration of smoking cessation, age of starting smoking, and depression in Korean adults

Characteristics

Men (n = 9,118)

Women (n = 10,966)

Non-depression (n = 8,702)

Depression (n = 416)

Non-depression (n = 10,094)

Depression (n = 872)

Age (years)

46.5 ± 0.4

56.4 ± 2.1*

50.1 ± 0.5

58.6 ± 1.8*

Smoking status

    

Never smokers

2,687 (30.9)

99 (22.1)*

9,843 (97.7)

798 (89.3)†

Former smokers

2,333 (24.0)

138 (28.7)

76 (0.3)

23 (2.8)

Current smokers

3,682 (45.0)

179 (49.1)

175 (1.6)

51 (7.8)

Pack-years of smoking

13.8 ± 0.4

20.3 ± 2.4*

0.2 ± 0.2

1.3 ± 0.5

Age of starting smoking

20.7 ± 0.1

20.8 ± 0.6

31.0 ± 2.0

35.6 ± 5.3

Duration of smoking cessation

13.0 ± 0.6

17.9 ± 3.9*

16.3 ± 4.0

15.5 ± 6.5*

Household Income

    

< one million won

2,494 (20.1)

260 (53.6)*

3,735 (26.7)

538 (53.2)*

< two million won

2,127 (21.1)

75 (18.3)

2,256 (20.6)

129 (15.9)

< three million won

1,655 (21.8)

27 (9.7)

1,647 (19.2)

94 (15.0)

≧ three million won

2,421 (36.8)

53 (18.2)

2,450 (33.3)

110 (15.7)

Education level

    

Uneducated

805 (5.8)

116 (22.2)*

3,153 (22.1)

489 (48.3)*

Elementary and Middle school

3,360 (28.3)

176 (38.0)

3,497 (29.4)

209 (22.5)

High school and College

4,537 (65.8)

123 (39.7)

3,441 (48.4)

174 (29.0)

Marital status

    

Married/partnered

6,573 (68.5)

255 (54.2)*

6,482 (64.4)

363 (40.2)*

Never married/non-partnered

2,129 (31.4)

160 (45.7)

3,611 (35.5)

509 (59.7)

Job status

    

Non-manual

1,332 (19.5)

20 (6.8)*

982 (13.9)

43 (6.8)*

Manual

5,814 (61.2)

155 (37.1)

4,518 (36.9)

237 (25.1)

Others

1,558 (19.2)

241 (56.0)

4,594 (49.0)

592 (68.0)

Hypertension

1,607 (13.7)

118 (24.6)*

2,475 (18.3)

319 (33.8)*

Diabetes Mellitus

715 (6.5)

63 (14.5)†

766 (5.9)

119 (12.6)†

Cerebrovascular disease

363 (3.0)

65 (8.9)*

413 (3.2)

100 (9.8)*

Body Mass Index (BMI)

24.0 ± 0.2

24.2 ± 1.8

24.6 ± 0.4

28.1 ± 2.1*

Physical activity

2,971 (33.2)

82 (19.4)*

2,608 (23.8)

164 (16.8)*

  1. Data are presented as mean (standard error) or unweighted number (weighted percent).
  2. * p <0.001.
  3. † p <0.05.