Table 3 Age-standardized prevalence rates (95% CI), OR, PR, and RII of current cigarette smoking by calendar year, gender, and socioeconomic position indicators: 147,805 South Korean men and women aged 25–64 from 1999, 2003, 2006 Social Statistics Survey

69.9 (68.8–70.9)

58.9 (57.9–59.9)

56.1 (55.1–57.0)

61.7 (59.7–63.8)

50.7 (48.9–52.4)

47.7 (46.0–49.3)

73.6 (72.2–75.0)

63.2 (61.9–64.6)

61.0 (59.6–62.4)

70.6 (67.3–73.9)

61.3 (58.2–64.4)

59.2 (56.1–62.3)

1.72 (1.62–1.84)

1.67 (1.57–1.77)

1.71 (1.61–1.82)

0.890

1.28 (1.17–1.40)

1.35 (1.24–1.47)

1.38 (1.27–1.51)

0.202

1.17 (1.15–1.20)

1.23 (1.20–1.26)

1.27 (1.23–1.30)

< 0.0001

1.06 (1.03–1.09)

1.10 (1.07–1.15)

1.13 (1.08–1.17)

0.009

61.2 (59.2–63.1)

50.4 (48.9–52.0)

48.5 (47.0–50.0)

72.5 (70.8–74.2)

63.1 (61.5–64.6)

61.5 (59.8–63.1)

74.0 (70.7–77.2)

65.5 (60.9–70.1)

64.2 (58.3–70.0)

2.69 (2.41–3.00)

2.82 (2.55–3.12)

2.83 (2.55–3.13)

0.524

1.31 (1.27–1.35)

1.51 (1.46–1.57)

1.58 (1.51–1.64)

< 0.0001

3.1 (2.9–3.4)

2.9 (2.7–3.1)

3.2 (3.0–3.4)

1.9 (0.9–2.9)

1.3 (0.9–1.8)

1.5 (1.1–1.9)

4.1 (3.7–4.5)

3.9 (3.4–4.4)

4.6 (4.1–5.2)

2.6 (2.3–3.0)

3.0 (2.7–3.3)

3.0 (2.6–3.3)

1.74 (1.28–2.37)

2.28 (1.70–3.05)

2.61 (2.02–3.38)

0.071

1.19 (0.87–1.63)

2.01 (1.51–2.69)

1.84 (1.42–2.38)

0.058

1.71 (1.26–2.32)

2.24 (1.68–2.98)

2.55 (1.98–3.27)

0.072

1.20 (0.88–1.63)

1.99 (1.49–2.64)

1.81(1.41–2.33)

0.063

1.9 (1.1–2.7)

1.6 (1.1–2.2)

1.6 (1.2–2.0)

2.8 (2.4–3.2)

3.2 (2.9–3.6)

3.9 (3.5–4.4)

3.8 (3.2–4.3)

4.1 (3.0–5.2)

7.5 (4.5–10.5)

2.28 (1.63–3.19)

3.28 (2.38–4.53)

3.52 (2.60–4.78)

0.067

2.22 (1.61–3.08)

3.17 (2.32–4.34)

3.39 (2.52–4.56)

0.066