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