Table 1.
Demographics of the United States and Hong Kong Study Populations
| Study Population | ||
|---|---|---|
| Characteristic | United States (n = 150) | Hong Kong (n = 295) |
| Median age, y | 27 | 43 |
| Sex | ||
| Male | 60 (40) | 125 (42) |
| Female | 90 (60) | 170 (58) |
| Ethnicity | ||
| White | 130 (87) | 0 |
| Native American | 1 (1) | 0 |
| Black | 14 (9) | 0 |
| Asian | 5 (3) | 295 (100) |
| Other | 0 | 0 |
| Birth year | ||
| 1930–1940 | 6 (4) | 24 (8) |
| 1941–1950 | 11 (7) | 38 (13) |
| 1951–1960 | 20 (13) | 39 (13) |
| 1961–1970 | 18 (12) | 37 (13) |
| 1971–1980 | 11 (7) | 38 (13) |
| 1981–1990 | 32 (21) | 40 (14) |
| 1991–2000 | 29 (19) | 40 (14) |
| 2001 or later | 23 (15) | 39 (13) |
Data are presented as No. (%).