Table 1.

Clinical characteristics of the patients studied

	UIP (n = 21)	NSIP (n = 6)	RB (n = 8)
Sex (M/F)	14/7	4/2	2/6
Age (years)*	59 (7)	61 (7)	45 (11)
Duration of symptoms (years)	2.1 (2.4)	0.6 (0.5)	4.4 (4.9)
Smoking (% current or ex-smokers)	71	50	83
FVC (% of that predicted)†	61 (19)	68 (21)	72 (20)
TLC (% of that predicted)‡	66 (18)	77 (23)	85 (21)
DLCO (% of that predicted)	44 (19)	38 (17)	58 (12)
CT-fib	1.57 (0.68)	1.53 (1.60)	0.55 (0.07)
CT-alv	1.44 (0.89)	1.13 (1.71)	1.55 (1.20)
Mean FF§	1.41 (0.82)	0.58 (0.51)	0.17 (0.41)
Maximum FF¶	1.59 (0.85)	0.63 (0.48)	0 (0)

Values are mean (SEM).

*p = 0.002, UIP and NSIP greater than RB; †p = 0.002, UIP lower than normal; ‡p = 0.001, UIP lower than normal; §p = 0.002, UIP greater than RB; ¶p<0.0001, UIP greater than RB.

CT-alv, alveolar abnormality on high resolution computed tomography; CT-fib, fibrotic abnormality on high resolution computed tomography; DLCO, diffusing capacity for carbon monoxide; FF, fibroblastic foci profusion; FVC, forced vital capacity; NSIP, non-specific interstitial pneumonia; RBILD, respiratory bronchiolitic interstitial lung disease; TLC, total lung capacity; UIP, usual interstitial pneumonia.