Table 1.
Population characteristics of 781 included and 225 excluded subjects
| Characteristic | Included | Excluded | P |
| Age (years) | 64.68 (22–93) | 65.6 (30–89) | 0.16 |
| Senior citizen | 51.3% | 57.5% | 0.11 |
| Male | 46.1% | 44.6% | 0.70 |
| Race – White, non-Hispanic | 97.1% | 98.1% | 0.41 |
| Married or living as married | 62.7% | 60.9% | 0.64 |
| Education – High School Graduate | 76.3% | 72.3% | 0.24 |
| Income less than $30,000 per year | 57.7% | 66.0% | 0.07 |
| Health Insurance | |||
| Private | 58.3% | 59.1% | 0.82 |
| Medicare | 58.1% | 66.7% | 0.03 |
| Medicaid | 20.9% | 22.8% | 0.56 |
| Military or Veterans' | 5.0% | 6.5% | 0.41 |
| None | 2.3% | 2.8% | 0.65 |
| Body Mass Index (kg/m2) | 34.1 (16–65) | 32.7 (18–68) | 0.01 |
| Duration of diabetes (years) | 9.4 (0.02–61) | 14.3 (0.03–62) | <0.001 |
| Glycosolated hemoglobin A1C (%) | 7.1 (4.7–13.5) | 7.1 (4.0–12.9) | 0.67 |
| Glycosolated hemoglobin A1C less than 7% | 57.9% | 58.9% | 0.44 |
| Primary care visits in the last month (visits) | 1.6 (0–25) | 1.7 (0–16) | 0.85 |
| Endocrinology visit in the last year | 14.9% | 20.0% | 0.08 |
| Insulin use | 16.8% | 25.0% | 0.01 |
| Oral agent use | 69.4% | 57.1% | 0.001 |
| Travel burden | |||
| Driving distance (km) | 12.4 (0.1–340) | 12.2 (0.1–59) | 0.78 |
| Driving distance less than 10 km | 59.0% | 56.3% | 0.51 |
Some respondents reported more than one type of health insurance. The sample sizes for excluded subjects vary as some characteristics had missing values. There are no missing values for the included subjects. P values calculated by Wilcoxon rank-sum or χ2 tests as appropriate.