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

Table 6

Severity and prognosis score of PAP (SPSP).

Severity criteria	Score
Smoking status
Never-smoker	0
Smoker	1
Symptoms
No	0
Yes	1
PaO2, mmHg
≥80	0
60–80	1
<60	2
HRCT score
≤8	1
8–16	2
16–24	3
24–32	4
DLCO, % predicted
≥80	0
60–80	1
<60	2

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; PAP: Pulmonary Alveolar Proteinosis; SPSP: severity and prognosis score of PAP.