Table 1

Mean annual decline1-150 in FEV0.75 during the first 15 years

Smoking status n Mean age (years)1-151 Baseline FEV0.75 (ml)1-152 Decline (ml/year)1-150 p Value
Never20049.4 3361–46.4<0.001
Past at the baseline12848.4 3291 –49.3<0.001
Permanent quitters 228 48.93174–55.5<0.001
Intermittent quitters7548.93330–55.50.008
Continuous37648.43151–66.0
For trend<0.001
  • 1-150 Adjusted for age and baseline pulmonary function. Continuous smokers are reference group.

  • 1-151 At baseline.

  • 1-152 At baseline, adjusted for age and height.