Table 1.
Sex, age, and race/ethnicity of KPSC enrollees
| Year | 2001 | 2006 | 2011 | 2016 |
|---|---|---|---|---|
| Sample size (N) | 3,394,681 | 3,597,242 | 3,789,911 | 4,566,649 |
| Male, % | 49 | 49 | 48 | 49 |
| Mean age,a y (SD) | 34.8 (21.4) | 35.9 (21.6) | 37.0 (22.1) | 38.2 (22.1) |
| Age group, y,a % | ||||
| 0–<1 | 1 | 1 | 1 | 1 |
| 1–4 | 5 | 5 | 5 | 4 |
| 5–14 | 16 | 15 | 14 | 12 |
| 15–24 | 14 | 15 | 15 | 14 |
| 25–34 | 14 | 13 | 13 | 15 |
| 35–44 | 16 | 15 | 13 | 13 |
| 45–54 | 14 | 15 | 14 | 14 |
| 55–64 | 10 | 11 | 12 | 13 |
| 65–74 | 6 | 6 | 7 | 9 |
| 75–84 | 3 | 3 | 4 | 4 |
| ≥ 85 | 1 | 1 | 1 | 1 |
| Race/ethnicity, % | ||||
| Unknown | 25 | 17 | 8 | 8 |
| Known | 75 | 83 | 92 | 92 |
| Distributionb | ||||
| Non-Hispanic white | 41 | 37 | 36 | 34 |
| Hispanic | 37 | 41 | 41 | 43 |
| Asian/Pacific Islander | 8 | 9 | 11 | 12 |
| African American | 12 | 11 | 10 | 9 |
| Others | 2 | 2 | 2 | 2 |
a
On December 31 of each year.
b
Among enrollees with known race/ethnicity.
KPSC = Kaiser Permanente Southern California; SD = standard deviation.