Table 1.
Baseline Characteristics for Intervention and Comparison Groups Before and After Propensity Score Matching among Medicare Beneficiaries Who Used Antiretroviral Medications in 2017
| Characteristics | Before Matching | After Matching | ||||||
|---|---|---|---|---|---|---|---|---|
| Intervention | Comparison | Intervention | Comparison | |||||
| (n=3,659) | (n=13,105) | (n=3,298, 33.3%) | (n=6,596, 66.7%) | |||||
| Number | % | Number | % | Number | % | Number | % | |
| Predisposing Factors | ||||||||
| Age, mean (SD) | 70.18 (4.56) | 70.28 (4.69) | 70.25 (4.62) | 70.14 (4.64) | ||||
| Maleb | 2,659 | 72.67 | 9,880 | 75.39 | 2,450 | 74.29 | 4,900 | 74.29 |
| Race/Ethnicity | ||||||||
| Non-Hispanic Whites | 1,698 | 46.41 | 6,246 | 47.66 | 1,569 | 47.57 | 3,138 | 47.57 |
| Blacks (African Americans) | 1,322 | 36.13 | 4,740 | 36.17 | 1,242 | 37.66 | 2,484 | 37.66 |
| Hispanics | 471 | 12.87 | 1,538 | 11.74 | 372 | 11.28 | 744 | 11.28 |
| Asian/Pacific Islanders | 62 | 1.69 | 175 | 1.34 | 37 | 1.12 | 74 | 1.12 |
| Other | 106 | 2.90 | 406 | 3.10 | 78 | 2.37 | 156 | 2.37 |
| Proportion of Married-Couple Families, mean (SD)a | 0.68 (0.09) | 0.68 (0.09) | 0.68 (0.09) | 0.68 (0.09) | ||||
| Proportion of High School Education and Above, mean (SD)a | 0.86 (0.05) | 0.86 (0.05) | 0.86 (0.05) | 0.86 (0.05) | ||||
| Income Per Capita (in $1,000), mean (SD)a | 59.77 (29.53) | 59.84 (29.90) | 60.32 (30.08) | 59.65 (29.64) | ||||
| Proportion of the Uninsured, mean (SD)ab | 0.097 (0.046) | 0.104 (0.048) | 0.098 (0.046) | 0.097 (0.044) | ||||
| Enabling Factors | ||||||||
| Metropolitan Statistical Areaa | 3,402 | 92.98 | 12,155 | 92.75 | 3,104 | 94.12 | 6,208 | 94.12 |
| Health Professional Shortage Areaa | 3,531 | 96.50 | 12,589 | 96.06 | 3,226 | 97.82 | 6,452 | 97.82 |
| Census Regionsab | ||||||||
| Northeast | 1,192 | 32.58 | 3,421 | 26.10 | 1,023 | 31.02 | 2,046 | 31.02 |
| Midwest | 395 | 10.80 | 1,378 | 10.52 | 347 | 10.52 | 694 | 10.52 |
| South | 1,305 | 35.67 | 5,478 | 41.80 | 1,204 | 36.51 | 2,408 | 36.51 |
| West | 767 | 20.96 | 2,828 | 21.58 | 724 | 21.95 | 1,448 | 21.95 |
| Need Factor | ||||||||
| Risk Adjustment Summary Score, mean (SD)b | 2.79 (1.87) | 2.23 (1.56) | 2.54 (1.55) | 2.49 (1.60) | ||||
SD = standard deviation.
a
County-level characteristics.
b
Characteristic significantly differed between the intervention and comparison groups before matching (P < .01).
All characteristics were similar between the intervention and comparison groups after matching (P > .05).