Table 1.
Demographic and other characteristics of the study population, cohort 2004–2005
| Disability level
|
||||
|---|---|---|---|---|
| None | Moderate | Severe | P value | |
| Survey, n (total n = 4,610) | 2,329 | 1,325 | 956 | |
| Population, in millions | 8.97 | 4.62 | 3.19 | |
| Age, years (mean ± SD) | 75 ± 5.6 | 78 ± 7.3 | 79 ± 7.8 | <0.0001 |
| Race, % | ||||
| White | 81.8 | 78.6 | 77.1 | 0.1064 |
| Black | 7.4 | 8.9 | 9.9 | |
| Hispanic | 7.0 | 7.8 | 7.6 | |
| Other | 3.8 | 4.7 | 5.4 | |
| Married, % | 46.9 | 36.4 | 30.1 | <0.0001 |
| Zip code income ≤$25,000, % | 57.4 | 68.0 | 75.6 | <0.0001 |
| Education <12 years, % | 22.6 | 32.9 | 38.3 | <0.0001 |
| HMO, % | 18.9 | 14.7 | 15.3 | 0.0127 |
| SSDI, % | 4.0 | 8.5 | 13.0 | <0.0001 |
| No. of comorbidities, % | ||||
| 0 | 52.7 | 29.7 | 26.5 | <0.0001 |
| 1 | 33.5 | 40.3 | 33.2 | |
| 2 | 10.1 | 20.1 | 23.3 | |
| ≥3 | 3.7 | 9.9 | 17.0 | |
| Self-rated health, % | ||||
| Fair/poor | 7.3 | 27.8 | 48.2 | <0.0001 |
| Cognitive deficit, % | 6.8 | 21.0 | 36.5 | <0.0001 |
| Depressed in last 12 months, % | 3.0 | 6.5 | 11.3 | <0.0001 |
HMO health maintenance organization, SSDI social security disability insurance