Table 5.
Demographic and clinical characteristics of the study sample
| African American (n = 2141) |
European American (n = 800) |
|||
|---|---|---|---|---|
| Cases (n = 1242) |
Controls (n = 899) |
Cases (n = 447) |
Controls (n = 353) |
|
| Male, n (%) | 317 (25.5) | 281 (31.3) | 192 (43.0) | 148 (41.9) |
| Agea | 36.6 (9.7) | 50.4 (14.7) | 42.6 (10.8) | 43.7 (10.5) |
| Percent individual African ancestrya | 82.5 (10.5) | 81.4 (11.7) | — | — |
| Radiographic phenotypeb (%) | ||||
| Resolved | 304 (31.9) | — | 40 (35.1) | — |
| Persistent | ||||
| All | 650 (68.1) | — | 74 (64.9) | — |
| Stages I–III | 462 (80.3) | — | 65 (87.8) | — |
| Stage IV | 188 (19.7) | — | 9 (12.2) | — |
a
Mean (s.d.).
b
Total with 2-year follow-up chest X-ray and Scadding stage data: African American, n = 954; European American, n = 114.