Demographic characteristics of affected patients (n=328)
| Age (n=307) | |
| Mean (SD) | 49.3 (23.5) years |
| Median | 47.8 years |
| Sex | |
| Male | 138 (42.1%) |
| Female | 185 (56.4%) |
| Race | |
| White | 250 (76.2%) |
| Black | 32 (9.8%) |
| Hispanic | 20 (6.1%) |
| Other | 22 (6.7%) |
| Usually obtains medical care from reporting physician | 234 (71.3%) |