Male, N (%)
|
167 (66.8 %)
|
70 (71.4 %)
|
98 (69.0 %)
|
0.999
|
0.999
|
0.999
|
Age (years), mean (SD)
|
60.8 (10.8)
|
62.1 (9.6)
|
60.9 (11.5)
|
0.999
|
0.999
|
0.930
|
BMI, mean (SD)
|
26.7 (4.9)
|
26.5 (4.4)
|
26.3 (4.6)
|
0.999
|
0.999
|
0.999
|
Race, N (%)b
|
White
|
183 (73.2 %)
|
82 (83.7 %)
|
104 (73.2 %)
|
0.999
|
0.193
|
0.098
|
Black or African American
|
34 (13.6 %)
|
11 (11.2 %)
|
24 (16.9 %)
|
0.999
|
0.650
|
0.999
|
Hispanic, Latino, or Spanish Origin
|
26 (10.4 %)
|
5 (5.1 %)
|
13 (9.2 %)
|
0.999
|
0.646
|
0.295
|
Asian
|
7 (2.8 %)
|
1 (1.0 %)
|
1 (0.7 %)
|
0.479
|
0.999
|
0.952
|
Other
|
2 (0.8 %)
|
0 (0.0 %)
|
0 (0.0 %)
| | | |
Insurance type, N (%)b
|
Commercial/private insurance
|
113 (45.2 %)
|
45 (45.9 %)
|
80 (56.3 %)
|
0.193
|
0.502
|
0.999
|
Medicare
|
109 (43.6 %)
|
44 (44.9 %)
|
61 (43.0 %)
|
0.999
|
0.999
|
0.999
|
Medicaid
|
26 (10.4 %)
|
12 (12.2 %)
|
17 (12.0 %)
|
0.999
|
0.999
|
0.999
|
Military insurance (VA or active military)
|
9 (3.6 %)
|
2 (2.0 %)
|
3 (2.1 %)
|
0.999
|
0.999
|
0.999
|
Other
|
0 (0.0 %)
|
1 (1.0 %)
|
0 (0.0 %)
|
-
|
-
|
-
|
No insurance
|
8 (3.2 %)
|
1 (1.0 %)
|
1 (0.7 %)
|
0.228
|
0.999
|
0.584
|
Smoking status at diagnosis, N (%)
| | | |
0.789
|
0.999
|
0.999
|
Never smoked
|
98 (39.2 %)
|
44 (44.9 %)
|
48 (33.8 %)
| | | |
Former smoker
|
124 (49.6 %)
|
42 (42.9 %)
|
77 (54.2 %)
| | | |
Current smoker
|
21 (8.4 %)
|
11 (11.2 %)
|
16 (11.3 %)
| | | |
Unknown/not sure
|
7 (2.8 %)
|
1 (1.0 %)
|
1 (0.7 %)
| | | |
Exposure to activities/ environmental agents, N (%)b
|
Asbestos
|
10 (4.0 %)
|
3 (3.1 %)
|
11 (7.7 %)
|
0.336
|
0.650
|
0.999
|
Farming/agriculture
|
27 (10.8 %)
|
9 (9.2 %)
|
25 (17.6 %)
|
0.213
|
0.131
|
0.999
|
Hairdressing
|
12 (4.8 %)
|
4 (4.1 %)
|
4 (2.8 %)
|
0.999
|
0.999
|
0.999
|
Metal dust
|
18 (7.2 %)
|
2 (2.0 %)
|
10 (7.0 %)
|
0.999
|
0.172
|
0.154
|
Stone cutting/polishing
|
7 (2.8 %)
|
0 (0.0 %)
|
6 (4.2 %)
|
0.999
|
<0.001*
|
<0.001*
|
Coal mining
|
5 (2.0 %)
|
1 (1.0 %)
|
2 (1.4 %)
|
0.999
|
0.999
|
0.999
|
Other
|
3 (1.2 %)
|
3 (3.1 %)
|
2 (1.4 %)
|
0.999
|
0.999
|
0.669
|
None
|
182 (72.8 %)
|
78 (79.6 %)
|
92 (64.8 %)
|
0.340
|
0.037*
|
0.598
|
Family history of pulmonary fibrosis, N (%)
|
16 (6.4 %)
|
6 (6.1 %)
|
5 (3.5 %)
|
0.564
|
0.923
|
0.999
|
Measurement period (days)
|
Concurrent, mean (SD)
|
172.8 (55.5)
|
174.9 (53.7)
|
181.6 (56.8)
|
0.575
|
0.999
|
0.999
|
Subsequent, mean (SD)
|
438.3 (283.1)
|
423.0 (280.0)
|
340.1 (275.9)
|
0.013*
|
0.118
|
0.999
|
Total follow-up, mean (SD)
|
611.1 (282.7)
|
597.9 (285.8)
|
521.7 (286.6)
|
0.036*
|
0.225
|
0.999
|