Table 1. Clinical and functional characteristics of the patients.

	IPFN = 26	SSc-ILDN = 9	ControlsN = 11
Age (years)	74 [56–84]	62 [46–72]*	68 [34–79]*
Gender (Male)	19 (73%)	4 (44%)	9 (81%)
Smoker (ever)	16 (61%)	2 (22%)	9 (81%)
Delay since diagnosis(days)	17.5 [0–655]	146 [5–525]	na
Oral Steroids	6 (23%)	1 (11%)	0
Dose (mg)	8.7 [5–40]	10	na
Exacerbation	3 (11%)	0	na
Progression	13 (48%)	0	na
Lung Function Tests
TLC (% pred)	68 [28–105]	56 [35–94]	88 [50–118]*
VC (% pred)	75 [34–108]	57 [29–134]	102 [52–109]
DLCO (% pred)	35 [15–91]	33 [16–85]	Not available
PaO2 (mmHg)	76 [45–101]	90 [39–99]	Not available
Pulmonaryhypertension (N)	3 (11%)	3 (33%)	0

Data are expressed as median [range] or N (%); na: not applicable. *p<0.05.