Table 2—

Changes in pulmonary function over time including missing data

SubjectsImprovedStable#WorsenedMissing
3 months7230 (42)27 (38)14 (19)1 (1)
6 months7234 (47)22 (31)15 (21)1 (1)
1 yr7234 (47)20 (28)17 (24)2 (3)
2 yrs7227 (38)19 (26)18 (25)8 (11)
  • Data are presented as n or n (%). #: including patients who maintained a clinically stable condition for many years with no follow-up PFT data; : including patients who died or had aggravated cases at the time of follow-up loss.