Table 5 Evaluation of therapeutic response at 3 months and 1 year (n = 32)

Time	Group	Improvement	Stable	Treatment failure/death
3 months	Group A (n = 15)	13 (87%)*	0	0/2 (13%)
	Group A (n = 15)	(9 CS; 4 CS+IS)	0	(1 CS; CS+IS)
	Group G (n = 17)	9 (53%)	7 (41%)	1 (6%)/0
	Group G (n = 17)	(6 CS; 3 CS+IS)	(5 CS; 2 CS+IS)	(1 CS)
1 year	Group A (n = 13)	0	8 (62%)	5 (38%)
	Group A (n = 13)	0	(4CS; 4CS+IS)	(5 CS)
	Group G (n = 17)	0	15 (88%)	2 (12%)
	Group G (n = 17)	0	(5 CS; 10 CS+IS)	(2 CS+IS)

Group A, acute onset of interstitial lung disease; group G, gradual onset of interstitial lung disease; CS, corticosteroids; IS, immunosuppressive drugs.
*Significantly different (p = 0.008) from group G at 3 months (Fisher exact test).