Table 2.

Time to change of FVC category according to baseline status, Kaplan-Meier analysis

Baseline value
Event value		FVC>90% ↓ <90%	FVC >90% ↓ <50%	FVC 50-90% ↓ <50%
N total		64	64	166
Time to event, years; median [95% CI]		2.4 [1.1–3.1]	4.9 [3.1 – NA]	4.0 [2.8–5.4]
Event	FVC below event value, N (%)	42 (66%)	1 (1.6%)	30 (18%)
	Dead, N (%)	9 (14%)	21 (33%)	43 (26%)
	Transplant, N (%)	0	0	0
Censoring	End of follow-up [FVC remained above event value], N (%)	11 (17%)	37 (58%)	60 (36%)
	Antifibrotic treatment initiated, N (%)	1 (1.6%)	4 (6.3%)	32 (19%)
	Lost to follow-up, N (%)	1 (1.6%)	1 (1.6%)	1 (0.6)