Hemoglobin Variant (Hemoglobin Aalborg) Mimicking Interstitial Pulmonary Disease

Table 1

Results of spirometry and body plethysmography, demonstrating forced expiratory volume in the 1st second in percent of expected value (FEV₁%), forced ventilatory capacity in percent of expected value (FVC%), the ratio between FEV₁ and FVC, and diffusing capacity of the lung for carbon monoxide in percent of expected value (DLCO%) and 6-minute walking tests in 7 patients with Hb Aalborg.

	Patient 1 (woman)	Patient 2 (man)	Patient 3 (woman)	Patient 4 (woman)	Patient 5 (woman)	Patient 6 (man)	Index person
FEV1 (%)	106	128	94	87	117	106	117
FVC (%)	108	122	103	107	104	98	134
FEV1/FVC	87	78	65	94	99	91	74
DLCO (%)	59	69	67	69	76	80	66
Walking distance (m)	417	480	562	420	568	551	273