Table 1—

Changes in pulmonary function over time for complete case analysis

SubjectsImprovedStable#Worsened
3 months4422 (50), 22±2116 (36)6 (44), 17±5
6 months4428 (63), 35±2310 (23)6 (14), 19±6
1 yr4429 (66), 41±2911 (25)4 (9), 17±4
2 yrs4426 (59), 48±3012 (27)6 (14), 25±37
  • Data are presented as n, n (%) or mean±sd change in forced vital capacity. #: including patients who maintained a clinically stable condition for many years with no follow-up pulmonary function testing data; : including patients who died or had aggravated cases at the time of follow-up loss.