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Table 4 Age-adjusted relative risk* (95% CI) for ischaemic heart disease (IHD) and chronic bronchitis (CB) by years smoked among physicians who have ever smoked, compared to those who have smoked up to 5 years (population estimates)a

From: Cigarette smoking and smoking-attributable diseases among Estonian physicians: a cross-sectional study

Conditionb Sex Ex-smokers Ever smokedc
Years smoked Years smoked
6–15 16–25 >25 6–15 16–25 >25
IHD Male 1.82 (0.61–5.41) 2.72 (0.92–7.97) 3.02 (1.08–8.45) 2.44 (0.85–7.02) 3.27 (1.15–9.32) 2.91 (1.08–7.83)
Female 1.83 (0.60–5.56) ** 5.40 (2.04–14.28) 1.75 (0.56–5.42) ** 4.32 (1.59–11.75)
Total 2.17 (0.96–4.89) 1.92 (0.77–4.82) 5.70 (2.65–12.26) 2.38 (1.07–5.30) 2.10 (0.88–5.01) 4.54 (2.19–9.40)
CB Male 1.08 (0.31–3.74) 2.04 (0.60–6.97) 2.31 (0.73–7.31) 0.79 (0.30–2.06) 1.17 (0.42–3.25) 2.10 (0.86–5.16)
Female 3.61 (0.80–16.30) 4.95 (1.05–23.38) 5.75 (1.14–29.04) 4.64 (1.05–20.47) 6.75 (1.56–29.16) 12.38 (2.97–51.61)
Total 2.22 (0.85–5.82) 3.55 (1.32–9.55) 4.86 (1.86–12.72) 1.91 (0.85–4.32) 2.77 (1.20–6.38) 5.42 (2.49–11.78)
Any conditiond Male 1.02 (0.45–2.33) 1.91 (0.87–4.17) 2.65 (1.31–5.36) 1.04 (0.51–2.12) 1.68 (0.85–3.33) 2.46 (1.35–4.50)
Female 2.20 (0.90–5.39) 1.70 (0.60–4.81) 6.59 (2.83–15.33) 2.56 (1.03–6.20) 2.36 (0.91–6.10) 7.11 (3.13–16.14)
Total 1.76 (0.93–3.30) 2.30 (1.19–4.44) 7.11 (3.13–16.14) 1.79 (1.01–3.18) 2.23 (1.24–4.03) 5.13 (3.06–8.62)
  1. a Age-adjusted risk ratios among occasional and daily smokers were not estimable
  2. b Age-adjusted risk ratios for lung emphysema were not estimable
  3. c Including ex-, occasional, and daily smokers
  4. d Including ischaemic heart disease, chronic bronchitis, and lung emphysema
  5. * Statistically significant risk ratios (p < 0.05) are italicized
  6. ** Not estimable
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