Table 4

Frequency of 5% or 10% decline in percentage predicted FVC during the follow-up period

Frequency of decline in baseline FVC

Follow-up year

1

2

3

4

5

6

7

> 8

≥5%

31.2

36.4

41.0

49.3

47.9

52.5

46.2

51.4

≥10%

16.7

18.2

23.1

31.0

32.9

30.5

38.5

45.9

Assassi et al. Arthritis Research & Therapy 2010 12:R166   doi:10.1186/ar3125