Baseline smoking status (Fig. 1A) was
used for analyses of hospitalization, mortality, and outpatient data. Hospitalization and mortality data were available for
the entire study period, and complete
outpatient data were available from 1997
to 2006.
Medication data were limited to
2001–2005. In the analysis of medication
data, we used the follow-up smoking status reported between 1997 and 2000
(Fig. 1B), because the medication data
were available only from 2001 through
2005.