Table 1. Demographic characteristics of study population.
| Demographic characteristics | N = 9,200 (100%) |
|---|---|
| Gender | |
| Male | 5,420 (59) |
| Female | 3,780 (41) |
| Age (in years) | |
| <60 | 5,190 (56) |
| ≥60 | 4,010 (44) |
| Ethnicity | |
| White | 7,338 (80) |
| African-American | 1,050 (11) |
| American Indian/Alaska Native | 55 (<1) |
| Asian/Pacific Islander | 625 (7) |
| Unknown | 132 (1) |
| Marital status | |
| Married | 5,067 (55) |
| Single | 1,756 (19) |
| Previously married | 1,654 (18) |
| Unknown | 723 (8) |
| Geographical location | |
| Northern plains | 994 (11) |
| East | 3,568 (39) |
| Pacific coast | 4,222 (46) |
| Southwest | 416 (4) |
| Outcome at study cut-off | |
| Alive | 6,397 (70) |
| Dead | 2,803 (30) |