Table 1.
Demographic and Residential Characteristics
| Patient Characteristics | Participants (%) | NonParticipants (%) | P-value* |
|---|---|---|---|
| Number of Patients | 211(100) | 37005(100) | |
| Median Age in Years (IQR) | 72 (68–76) | 73 (69–78) | <0.001 |
| Race/Ethnicity | |||
| White | 180(85) | 29707(80) | 0.314 |
| Black | 13(6) | 3350(9) | |
| Hispanic | 8(4) | 1638(4) | |
| Other | 10(5) | 2310(6) | |
| Marital Status | |||
| Single | 11(5) | 2371(6) | 0.447 |
| Married | 154(73) | 25469(69) | |
| Separated, Divorced, or Widowed | 22(10) | 5071(14) | |
| Unknown | 24(11) | 4094(11) | |
| Place of Residence | |||
| Metropolitan | 177(84) | 31230(84) | 0.253 |
| Urban | 27(13) | 5103(14) | |
| Rural | 7(3) | 672(2) | |
| Zip-code of Residence | |||
| Unknown | 11(5) | 1474(4) | 0.363 |
| Known | 200(95) | 35531(96) | |
| Median Income within Zip-code (IQR) | 51656 (38763–69754) | 46723 (35351–61363) | <0.001 |
| Median Education within Zip-code (IQR) | |||
| Less than High School | 0.129 (0.075–0.193) | 0.150(0.095–0.246) | 0.001 |
| High School Graduate | 0.254 (0.184–0.345) | 0.266(0.197–0.336) | 0.731 |
| Some College | 0.263 (0.207–0.304) | 0.274(0.227–0.328) | 0.001 |
| College Graduate | 0.256 (0.171–0.458) | 0.232(0.143–0.381) | 0.003 |
*
P-value based on either a chi-squared test or Wilcoxon-Mann-Whitney U test.