Table 1.
Demographic and clinical characteristics of the cohort and reference populations.
| Characteristics | Patients who completed the consent process (N=40,144) | UCLAa Health population (N=583,282) | Los Angeles County populationb | ||||
| Age (years), mean (SD) | 53.1 (17.5) | 51.6 (19.1) | —c | ||||
| Aged ≥65 years, n (%) | 12,123 (30.2) | 160,479 (27.5) | 16.6 | ||||
| Female, n (%) | 22,302 (55.6) | 333,998 (57.3) | 50.7 | ||||
| Ethnicity, n (%) | |||||||
| Not Hispanic or Latino | 32,413 (80.7) | 429,327 (73.6) | 51.5 | ||||
| Hispanic or Latino | 6055 (15.1) | 64,234 (11) | 48.5 | ||||
| Other, unknown, or refused | 1676 (4.2) | 89,721 (15.4) | 0 | ||||
| Race, n (%) | |||||||
| White | 24,840 (61.9) | 330,572 (56.7) | 71 | ||||
| Asian | 4667 (11.6) | 54,043 (9.3) | 15.1 | ||||
| Black or African American | 2558 (6.4) | 27,338 (4.7) | 9.1 | ||||
| Native Hawaiian or other Pacific Islander | 119 (0.3) | 1204 (0.2) | 0.4 | ||||
| American Indian or Alaska Native | 115 (0.3) | 2282 (0.4) | 1.5 | ||||
| Multiple races, other, unknown, or refused | 7845 (19.5) | 167,843 (28.8) | 3 | ||||
| Marital status, n (%) | |||||||
| Married, significant other, or partner | 22,897 (57) | 289,364 (49.6) | — | ||||
| Single | 12,227 (30.5) | 209,016 (35.8) | — | ||||
| Divorced, separated, dissolved, or widowed | 4573 (11.4) | 52,201 (8.9) | — | ||||
| Other or unknown | 447 (1.1) | 32,701 (5.6) | — | ||||
| Neighborhood education level (percentage of high school graduates), n (%) | |||||||
| <50% | 17,074 (42.5) | 209,697 (36) | — | ||||
| >50% | 17,785 (44.3) | 256,249 (43.9) | — | ||||
| Unknown | 5285 (13.2) | 117,336 (20.1) | — | ||||
| Charlson score, mean (SD) | 2.7 (3.5) | 1.2 (2.3) | — | ||||
| ≥1 ambulatory visit, n (%) | 39,870 (99.3) | 547,283 (93.8) | — | ||||
| ≥1 inpatient admission, n (%) | 12,438 (31) | 43,695 (7.5) | — | ||||
| ≥1 emergency department–only visit, n (%) | 9131 (22.7) | 75,913 (13) | — | ||||
| ≥1 emergency department–to-inpatient visit, n (%) | 5143 (12.8) | 24,757 (4.2) | — | ||||
aUCLA: University of California, Los Angeles.
bThe Los Angeles County data reflect census data from 2019, which only provides rates [23].
cNot available.