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Table 2 Smoking status and Odds ratio for chronic renal failure

From: Association between smoking and chronic kidney disease: a case control study

  Cases Control OR (CI 95%) P
  n %* n %**   
Ever regular smoking       
   No 112 56.5 251 67.7 1 (Reference) -
   Yes 86 43.4 120 32.3 1.6 (1.12-2.29) 0.009
Regular smoking       
   Former 30 15.1 43 11.6 1.04(0.58-1.86) 0.8
   Current 56 28.2 77 20.8 1.63(1.08-2.45) 0.02
No. of pack/years, cigarettes       
   1-15 34 17.1 60 16.1 2.1(0.96-4.57) 0.06
   16-30 16 8 29 7.8 2.04(1.08-3.88) 0.028
   > 30 36 18.1 31 8.3 2.6(1.53-4.41) 0.000
  1. *Of cases (n = 198). **Of control (n = 371). Adjusted by age and gender.