Skip to main content

Table 1 CO breath test result and self reported smoking status for all subjects

From: Comparison of CO breath testing and women's self-reporting of smoking behaviour for identifying smoking during pregnancy

CO breath test CO level Non smokers (number) Smokers (number) Total number
    0–10 11–20 21–30 >30  
  0 6 0 0 0 0 6
  1 1790 70 6 0 0 1866
  2 66 11 4 0 0 81
  3 59 26 4 0 0 89
  4 28 23 2 1 0 54
  5 17 15 9 0 0 41
  6 4 20 2 1 0 27
  7 5 14 8 3 0 30
  ≥8 27 177 114 30 6 354
  Total 2002      2548