Table 1 Baseline characteristics of the study population in intitial year of study (Undetermined previous use due to insufficient medication history prior to 1993 for 386 (4.2%) patients)
At least one ICS prescription filled in 1993 | New users | Previous users (≥ 1 prescription in 1991 or 1992) |
|---|---|---|
(% or range) | (% or range) | |
All patients | 3,367 (36.5) | 5,481 (59.4) |
Male (%) | 1,629 (48.4) | 2,813 (51,3) |
Mean age (yrs) | 43.9 (0–94) | 50.7 (2–99) |
Mean follow-up (yrs) | 7.7 (0.04–10.3) | 7.7 (0.02–10.3) |
Mean number of ICS prescriptions filled in 1993 | 2.2 (1–28) | 3.6 (1–25) |