Do We Need Exercise Tests to Detect Gas Exchange Impairment in Fibrotic Idiopathic Interstitial Pneumonias?

Table 1

Pulmonary function tests results.

	All patients	IPF	f-NSIP
	n = 121	n = 88	n = 33
Age	63.6 ± 8.4	64.3 ± 8.3	61.6 ± 8.5
BMI	28.4 ± 4.4	28.2 ± 4.1	29.1 ± 5.1
TLC (L)	4.35 ± 1	4.39 ± 1.01	4.23 ± 1
TLC (%)	70 ± 14.5	69.4 ± 14.6	73 ± 13.9
% with low TLC	76	82	62
FVC (L)	2.72 ± 0.74	2.77 ± 0.72	2.61 ± 0.8
FVC (%)	76 ± 16	75.5 ± 16.9	77.2 ± 13.6
% with low FVC	61	58	65
FEV1 (L/sec)	2.24 ± 0.58	2.26 ± 0.57	2.12 ± 0.6
FEV1 (%)	78.5 ± 16.4	78.4 ± 17.2	78.8 ± 14.1
% with low FEV1	55	52	62
DLCO (mLCO·min^−1·mmHg^−1)	11.2 ± 4	11.17 ± 4.4	11.3 ± 3.2
DLCO (%)	42.9 ± 12.3	41.9 ± 12.5	45.6 ± 11.6
% with low DLCO	98	98	97
KCO (mLCO·min^−1·mmHg^−1/L)	2.99 ± 0.76	2.92 ± 0.77	3.2 ± 0.7
KCO (%)	71.3 ± 17	70.3 ± 17.7	74.2 ± 3.7
% with low KCO	66.6	70	56
PaO2, rest (mmHg)	76.8 ± 12.6	75.9 ± 12.8	79.4 ± 12
% with low PaO2	42	46	31
P(A-a) O2, rest (mmHg)	30.8 ± 12.5	31.4 ± 12.6	29.2 ± 12.2
% with low P(A-a) O2, rest	26	30	16