Table 1.
Descriptive Statistics, the Social Environment and Biomarkers of Aging Study, 2006.
| Interview Sample n=1,197 | Exam Sample n=919 | Included in Interview Sample, Excluded from Exam Sample n=278 | ||||
|---|---|---|---|---|---|---|
|
|
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| Health ratings and mortality | ||||||
| Died by 6/30/2011; % | 11 | 10 | 13 | |||
| Self-rated health (scale 1-5); mean (SD) | 3.2 | (1.0) | 3.1 | (1.0) | 3.3 | (1.1) |
| Interviewer-rated health (scale 1-5); mean (SD) | 3.8 | (1.0) | 3.8 | (0.9) | 3.9 | (1.1) |
| Physician-rated health (scale 1-5); mean (SD) | -- | 3.3 | (0.8) | -- | ||
| Sociodemographic covariates | ||||||
| Women; % | 47 | 46 | 51 | |||
| Age (years); mean (SD) | 65.7 | (10.2) | 66.1 | (9.9) | 64.2 | (10.8) |
| Urban (versus rural); % | 59 | 59 | -- | 58 | ||
| Completed education (years); mean (SD) | 6.9 | (4.8) | 7.0 | (4.9) | 6.9 | (4.7) |
| Number of social activities; mean (SD) | 0.8 | (1.1) | 0.8 | (1.1) | 0.7 | (1.1) |
| Married or has companion; % | 76 | 76 | 74 | |||
| Smokes daily; % | 17 | 16 | 19 | |||
| Self-reported chronic conditions | ||||||
| High blood pressure; % | 34 | 34 | 35 | |||
| Take meds for high blood pressure; % | 32 | 32 | 33 | |||
| Diabetes; % | 17 | 18 | 15 | |||
| Heart disease; % | 17 | 17 | 15 | |||
| Cancer; % | 2 | 1 | 3 | |||
| Respiratory disease; % | 6 | 7 | 6 | |||
| Ulcer; % | 13 | 14 | 8 | |||
| Liver disease; % | 7 | 8 | 4 | |||
| Kidney disease; % | 5 | 5 | 6 | |||
| Gout; % | 8 | 8 | 7 | |||
| Psychological well-being | ||||||
| Center for Epidemiologic Studies Depression scale (scale 0-10); mean (SD) | 4.8 | (5.7) | 4.8 | (5.6) | 4.9 | (6.2) |
| Perceived stress index (scale 0-12); mean (SD) | 0.2 | (0.3) | 0.2 | (0.3) | 0.2 | (0.3) |
| Poor sleep quality index (scale 0-15); mean (SD) | 4.0 | (3.3) | 4.1 | (3.4) | 3.8 | (3.1) |
| Self-reported functioning | ||||||
| Number of difficulties with activities of daily living (scale 0-6); mean (SD) | 0.2 | (1.0) | 0.2 | (0.9) | 0.3 | (1.2) |
| Number of mobility limitations (scale 0-9); mean (SD) | 1.8 | (2.4) | 1.8 | (2.4) | 1.7 | (2.6) |
| Performance-based functioning | ||||||
| Unable to perform grip strength; % | 3 | 3 | 4 | |||
| Grip strength (mean kilograms); mean (SD) | 27.1 | (11.5) | 27.2 | (11.2) | 26.5 | (12.2) |
| Unable to perform peak flow; % | 4 | 3 | 8 | |||
| Peak flow (mean L/min); mean (SD) | 323 | (150) | 328 | (149) | 305 | (153) |
| Unable to perform walk speed; % | 5 | 3 | 9 | |||
| Walk speed (mean m/sec); mean (SD) | 0.8 | (0.3) | 0.8 | (0.3) | 0.8 | (0.4) |
| Unable to perform chair stand; % | 10 | 8 | 18 | |||
| Chair stand (mean stands/sec); mean (SD) | 0.5 | (0.2) | 0.5 | (0.2) | 0.4 | (0.3) |
| SD indicates standard deviation. | ||||||