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Thorax 57:964-966 doi:10.1136/thorax.57.11.964
  • Original articles

Tobacco smoking and pulmonary tuberculosis

Table 4

Cumulative effect of smoking on occurrence of pulmonary tuberculosis

Smoking duration (years)
<10 11–20 >20 Non-smokers
p<0.0001 (χ2 for linear trend = 15.867).
Cases 14 22 28 21
Controls 80 88 85 206
Odds ratio 1.72 2.45 3.23 –

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