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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

From: Monitoring trends in socioeconomic health inequalities: it matters how you measure

  1999 2003 2006 p for trend
Men 69.9 (68.8–70.9) 58.9 (57.9–59.9) 56.1 (55.1–57.0)  
Occupational class     
   Non-manual 61.7 (59.7–63.8) 50.7 (48.9–52.4) 47.7 (46.0–49.3)  
   Manual 73.6 (72.2–75.0) 63.2 (61.9–64.6) 61.0 (59.6–62.4)  
   Others 70.6 (67.3–73.9) 61.3 (58.2–64.4) 59.2 (56.1–62.3)  
   OR (95% CI) of manual vs. non-manual 1.72 (1.62–1.84) 1.67 (1.57–1.77) 1.71 (1.61–1.82) 0.890
   OR (95% CI) of others vs. non-manual 1.28 (1.17–1.40) 1.35 (1.24–1.47) 1.38 (1.27–1.51) 0.202
   PR (95% CI) of manual vs. non-manual 1.17 (1.15–1.20) 1.23 (1.20–1.26) 1.27 (1.23–1.30) < 0.0001
   PR (95% CI) of others vs. non-manual 1.06 (1.03–1.09) 1.10 (1.07–1.15) 1.13 (1.08–1.17) 0.009
Education     
   College or higher 61.2 (59.2–63.1) 50.4 (48.9–52.0) 48.5 (47.0–50.0)  
   High school 72.5 (70.8–74.2) 63.1 (61.5–64.6) 61.5 (59.8–63.1)  
   Middle school or less 74.0 (70.7–77.2) 65.5 (60.9–70.1) 64.2 (58.3–70.0)  
   RII (95% CI) by logistic regression 2.69 (2.41–3.00) 2.82 (2.55–3.12) 2.83 (2.55–3.13) 0.524
   RII (95% CI) by log-binomial regression 1.31 (1.27–1.35) 1.51 (1.46–1.57) 1.58 (1.51–1.64) < 0.0001
Women 3.1 (2.9–3.4) 2.9 (2.7–3.1) 3.2 (3.0–3.4)  
Occupational class     
   Non-manual 1.9 (0.9–2.9) 1.3 (0.9–1.8) 1.5 (1.1–1.9)  
   Manual 4.1 (3.7–4.5) 3.9 (3.4–4.4) 4.6 (4.1–5.2)  
   Others 2.6 (2.3–3.0) 3.0 (2.7–3.3) 3.0 (2.6–3.3)  
   OR (95% CI) of manual vs. non-manual 1.74 (1.28–2.37) 2.28 (1.70–3.05) 2.61 (2.02–3.38) 0.071
   OR (95% CI) of others vs. non-manual 1.19 (0.87–1.63) 2.01 (1.51–2.69) 1.84 (1.42–2.38) 0.058
   PR (95% CI) of manual vs. non-manual 1.71 (1.26–2.32) 2.24 (1.68–2.98) 2.55 (1.98–3.27) 0.072
   PR (95% CI) of others vs. non-manual 1.20 (0.88–1.63) 1.99 (1.49–2.64) 1.81(1.41–2.33) 0.063
Education     
   College or higher 1.9 (1.1–2.7) 1.6 (1.1–2.2) 1.6 (1.2–2.0)  
   High school 2.8 (2.4–3.2) 3.2 (2.9–3.6) 3.9 (3.5–4.4)  
   Middle school or less 3.8 (3.2–4.3) 4.1 (3.0–5.2) 7.5 (4.5–10.5)  
   RII (95% CI) by logistic regression 2.28 (1.63–3.19) 3.28 (2.38–4.53) 3.52 (2.60–4.78) 0.067
   RII (95% CI) by log-binomial regression 2.22 (1.61–3.08) 3.17 (2.32–4.34) 3.39 (2.52–4.56) 0.066
  1. CI = confidence intervals; OR = odds ratio; PR = prevalence ratio; RII = relative index of inequality.