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

Table 1

Demographic and clinical characteristics of the patients with PAP.

		%	Mean ± SD	PaO2, mmHg
Age, y	101		48.9 ± 11.2
Age at diagnosis, y	101		47.4 ± 11.0
≤50	62	61.4	38.5 ± 7.6	76.8 ± 17.6
>50	39	38.6	57.7 ± 5.4	74.8 ± 18.3
value (≤50 versus >50)				0.581
Sex
Male	72	71.3		75.9 ± 18.0
History of smoking/occupational exposure	42/40	58.3/55.6
Neither history of smoking nor occupational exposure	15	20.8
Female	29	28.7		76.2 ± 17.7
History of smoking/occupational exposure	0/10	0/34.5
Neither history of smoking nor occupational exposure	19	65.5
value (male versus female)				0.954
Symptoms
Yes	87	86.1		74.8 ± 16.2
No	14	13.9		79.4 ± 15.5
value				0.317
Smoking status
Smoker (including ex-smoker)	42 (8)	41.6 (7.9)		71.6 ± 13.9
Never-smoker	59	58.4		79.2 ± 19.6
value				0.035
Occupational exposure
Yes	50	49.5		77.1 ± 18.7
No	51	50.5		74.9 ± 16.9
value				0.537

Data are presented as (%) or mean ± SD unless otherwise stated. PaO₂: arterial partial pressure of oxygen; PAP: Pulmonary Alveolar Proteinosis.