Table 1.
Demographical characteristics (N = 513)
| Characteristic | No. (%) |
|---|---|
| Age (years) | |
| Median | 41 |
| Range | 17 days-93 years |
| 0-17 | 105 (20) |
| 18-64 | 313 (61) |
| ≥65 | 95 (19) |
| Male sex | 287 (56) |
| Primary care at PAMF-PA | 298 (58) |
| High income zip codes*(1) | 463 (99) |
| High education zip codes*(2) | 459 (98) |
Abbreviation: PAMF-PA, Palo Alto Medical Foundation, Palo Alto division.
* Based on 468 Bay Area residents, proportion in zip code of (1) households with median household income > national median
household income; (2) residents aged ≥25 yrs with a bachelor's degree or higher greater than the proportion nationwide.
(Definitions from the U.S.Census.)