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Table 3 Smoking prevalence and inequalities in smoking by education level in each age group among males more than 21 years old, 2006 (n = 11,688)

From: Great inclination to smoke among younger adults coming from low-socioeconomic class in Thailand

Age-group Smoking prevalence (in percentage) Odds ratio** SII/RII***
  Low Education Middle Education High Education Total (95% CI) p-value
21-30 57.1 47.2 18.5 40.9 5.88* -54.3/-1.33
      4.3-8.0 p = 0.18
31-40 54.4 45.8 25.6 46.0 3.47* -36.7/-0.80
      2.8-4.4 p = 0.24
41-50 52.6 41.2 24.8 44.8 3.37* -39.3/-0.88
      2.7-4.2 p = 0.16
51-60 47.3 27.4 18.8 40.1 3.88* -47.2*/-1.18*
      2.8-5.3 p = 0.02
> = 61 36.0 17.1 13.5 32.0 3.61* -39.6*/-1.24*
      2.2-6.1 p < 0.01
All ages 47.5 39.8 21.7 41.2 3.26* -33.1/-0.80
      2.8-3.8 p = 0.26
  1. * Significant at p < 0.05
  2. ** "Odds ratio" represents the ratio of smoking prevalence among low education subjects to that among high education subjects.
  3. *** "SII" denotes the slope index of inequality and RII relative index of inequality. The RII is the ratio of SII to the age-group specific smoking prevalence.