Table 4 Participants who attended a third examination, by smoking category at the second examination and sex
Status at the second examination, by smoking categoryPercentage smoking at the third examination
Sustained never smokers1.239661.67759
Sustained ex-smokers4.923386.81234
Sustained smokers86.1621089.85527
  • Percentage smoking at the third examination and number in each category.

  • *Percentage smoking in the category; †no. of participants in the category.