Table 1.
Cohort characteristics in 2000, 2008, and 2015.
| Characteristics | 2000 | 2008 | 2015 | |||
|---|---|---|---|---|---|---|
| Number | % | Number | % | Number | % | |
| Total cohort members | 651675 | 100.0 | 821710 | 100.0 | 975637 | 100.0 |
| Age: | ||||||
| 50-64 years | 463325 | 71.1 | 608138 | 74.0 | 668658 | 68.5 |
| 65-75 years | 188350 | 28.9 | 213572 | 26.0 | 306979 | 31.5 |
| Sex: | ||||||
| Male | 309394 | 47.5 | 386751 | 47.1 | 458263 | 47.0 |
| Female | 342281 | 52.5 | 434959 | 52.9 | 517374 | 53.0 |
| Race/ethnicity: | ||||||
| Non-Hispanic White | 419850 | 64.4 | 498576 | 60.7 | 569317 | 58.4 |
| Black | 48248 | 7.4 | 59820 | 7.3 | 70225 | 7.2 |
| Asian or Pacific | 73458 | 11.3 | 121092 | 14.7 | 163516 | 16.8 |
| Islander | ||||||
| Hispanic | 60412 | 9.3 | 91723 | 11.2 | 124155 | 12.7 |
| Other | 4755 | 0.7 | 6949 | 0.8 | 9039 | 0.9 |
| Unknown | 44952 | 6.9 | 43550 | 5.3 | 39385 | 4.0 |
| KPNC membership duration: | ||||||
| ≤5 years | 111939 | 17.2 | 141794 | 17.3 | 162945 | 16.7 |
| 6-10 years | 119773 | 18.4 | 146977 | 17.9 | 169290 | 17.4 |
| ≥11 years | 419963 | 64.4 | 532939 | 64.9 | 643402 | 66.0 |
| Mean±SD, years | 11.2±4.6 | 11.3±4.6 | 11.4±4.6 | |||
KPNC, Kaiser Permanente Northern California; SD, standard deviation