Table 1. Demographic characteristics of all patients included in the study.
| Parameters | Total subjects (n = 252) |
|---|---|
| Age (years) | |
| Mean ± SD | 70.7± 9.9 |
| Range | 30 to 103 |
| Gender, n (%) | |
| Male | 109 (43.2%) |
| Female | 143 (56.7%) |
| Race, n (%) | |
| Caucasian | 204 (81.2%) |
| African-American | 44 (17.5%) |
| Job status (%) | |
| Employed | 44 (18.1%) |
| Unnenployed | 19 (7.8%) |
| Retired | 180 (74.0%) |
| Marital status (%) | |
| Married | 119 (69.5%) |
| Single | 25 (14.6%) |
| Widowed | 14 (8.1%) |
| Divorced | 13 (7.6%) |
| Education (%) | |
| Illiterate | 2 (0.8%) |
| Elementary school | 137 (56.6%) |
| High school degree | 58 (23.9%) |
| College degree | 8 (3.2%) |
| Income per month (%) | |
| Lower than US$414.00 | 81 (48.2%) |
| Between US$414.00 and US$2,073.00 | 68 (40.4%) |
| Between US$2,073.00 and US$4,147.00 | 17 (10.1%) |
| Higher than US$4,147.00 | 2 (1.1%) |
| Comorbidity Index (%) | |
| Zero | 71 (28.9%) |
| One | 109 (44.4%) |
| Two | 58 (23.6%) |
| Three | 6 (2.4%) |