A New Scale to Assess the Severity and Prognosis of Pulmonary Alveolar Proteinosis

Table 4

Comparison of HRCT score and lung function values between different groups according to PaO₂.

PaO2, mmHg		%	HRCT score	DLCO, % predicted
≥80	40	36.6	86.3 ± 18.0	11.4 ± 5.0
60–80	46	31.7	76.2 ± 14.5	17.3 ± 5.9
<60	15	31.7	64.0 ± 12.6	23.8 ± 6.9
value
≥80 versus 60–80			<0.001	<0.001
60–80 versus <60			0.035	0.016
≥80 versus <60			<0.001	<0.001

Data are presented as (%) or mean ± SD unless otherwise stated. DLCO: single-breath diffusing capacity of carbon monoxide; HRCT: high resolution computed tomography; PaO₂: arterial partial pressure of oxygen.