Table 1 Characteristics of patients hospitalized with pulmonary alveolar proteinosis (2012–2014)

Sex

  Ratio (M:F)

0.81

1.92

1.06

1.22

  Male

65 (44.8%)

125 (65.8%)

85 (51.52%)

275 (55%)

  Female

80 (55.2%)

65 (35.2%)

80 (48.48%)

225 (45%)

Mean age (years)

37.93 (CI 31.7–44.12)

44.31 (CI 39.3–49.3)

41.24 (CI 36.15–46.32)

41.45 (CI 38.3–44.59)

Age groups

  0–18 (years)

30 (20.7%)

10 (5.3%)

5 (3%)

45 (9%)

  19–40 (years)

30 (20.7%)

55 (28.9%)

70 (42.4%)

155 (31%)

  41–65 (years)

75 (51.7%)

115 (60.5%)

85 (51.6%)

275 (55%)

  > 66 (years)

10 (6.9%)

10 (5.3%)

70 (42.4%)

25 (5%)

Race*

  White

85 (60.7%)

105 (63.6%)

75 (50%)

265 (58.24%)

  Black

25 (17.8%)

35 (21.2%)

50 (33.3%)

110 (24.18%)

  Hispanic

20 (14.3%)

5 (3.0%)

25 (16.7%)

50 (11%)

  Asian/Pacific Islander

0

10 (6.1%)

0

10 (2.2%)

  Other

10 (7.1%)

10 (6.1%)

0

20 (4.4%)

Hospital region

  Northeast

25 (17.4%)

45 (23.7%)

20 (12.1%)

90 (18%)

  Midwest

40 (27.6%)

45 (23.7%)

20 (12.1%)

105 (21%)

  South

35 (24.1%)

70 (36.8%)

75 (45.5%)

180 (36%)

  West

45 (31%)

30 (15.8%)

50 (30.3%)

125 (25%)

Bed size hospital

  Small

20 (13.8%)

10 (5.2%)

20 (12.1%)

50 (10%)

  Medium

30 (20.7%)

35 (18.5%)

45 (27.3%)

110 (22%)

  Large

95 (65.5%)

145 (76.3%)

100 (60.6%)

340 (68%)

Median yearly income

  $1–39,999

35 (24.1%)

50 (26.3%)

50 (30.3%)

135 (27%)

  $40–50,999

25 (17.2%)

40 (21.1%)

40 (24.2%)

105 (21%)

  $51–65,999

30 (20.7%)

60 (31.5%)

30 (18.2%)

120 (24%)

  > $60,000

55 (37.9%)

40 (21.1%)

45 (27.3%)

140 (28%)

Charlson comorbidity index

  0

75 (51.7%)

125 (65.8%)

75 (45.5%)

275 (55%)

  1

45 (31%)

35 (18.4%)

50 (30.3%)

130 (26%)

  2

20 (13.8%)

15 (7.9%)

20 (12.1%)

55 (11%)

  3

5 (3.5%)

15 (7.9%)

20 (12.1%)

40 (8%)