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Table 2 Proportion of current smokers and TJR by BMI and socioeconomic status

From: Smoking and primary total hip or knee replacement due to osteoarthritis in 54,288 elderly men and women

  1stquintile (Lowest SES) 2ndquintile 3rdquintile 4thquintile 5thquintile (Highest SES)
N = 9,046 N = 8,848 N = 8,953 N = 8,911 N = 8,856
BMI < 30 (N = 36,305)      
Current smokers, % 11.5 8.3!! 8.3!! 7.4!! 6.5!!
TJR, % 6.7 6.6 7.7! 6.8 7.4
BMI > =30 (N = 8,309)      
Current smokers, % 7.6 6.2 5.4! 5.3! 4.9!
TJR, % 11.2 14.2! 12.0 13.0 13.1
All (N = 44,614)      
Current smokers, % 10.7 7.9!! 7.7!! 7.1!! 6.2!!
TJR,% 7.7 8.1 8.5! 7.9 8.3
  1. Abbreviations: BMI (body mass index), SES (socioeconomic status based on the distribution of Socio-Economic Indices for Areas (SEIFA) in the cohort), TJR (total joint replacement).
  2. ! 0.001 < P value < 0.05; !! P value < 0.001, comparison with Lowest SES (1st SEIFA quintile).