Table I.
Baseline patient and hospital characteristics after coarsened exact matching RTSA to TSA and RTSA to HA
| Baseline characteristics | RTSA vs. TSA |
RTSA vs. HA |
||||
|---|---|---|---|---|---|---|
| RTSA (n = 7197) | TSA (n = 9000) | P value | RTSA (n = 5269) | HA (n = 2149) | P value | |
| Age (yr) | 72.9 (32-95) | 72.9 (33-93) | .54∗ | 73.4 (45-91) | 73.4 (46-90) | .95∗ |
| Female | 62.7 | 62.7 | 1 | 66.1 | 66.1 | 1 |
| Race | ||||||
| White | 88.0 | 88.0 | 1 | 92.8 | 92.8 | 1 |
| Black | 2.0 | 2.0 | 1 | 0.8 | 0.8 | 1 |
| Hispanic | 1.4 | 1.4 | 1 | 0.6 | 0.6 | 1 |
| Other/missing | 8.5 | 8.5 | 1 | 5.9 | 5.9 | 1 |
| Insurance type | ||||||
| Medicare | 85.2 | 85.2 | 1 | 88.0 | 88.0 | 1 |
| Medicaid | 0.3 | 0.3 | 1 | 0.2 | 0.2 | 1 |
| Private insurance | 12.5 | 12.5 | 1 | 10.4 | 10.4 | 1 |
| Other/missing | 1.9 | 1.9 | 1 | 1.4 | 1.4 | 1 |
| Elixhauser comorbidity index score | 1.0 (−9 to 20) | 1.0 (−9 to 20) | .35∗ | 0.9 (−8 to 20) | 0.9 (−7 to 19) | .60∗ |
| Prior history of shoulder arthroplasty | 2.6 | 2.6 | 1 | 0.5 | 0.5 | 1 |
| Type of hospital | ||||||
| Rural | 9.4 | 9.4 | 1 | 8.4 | 8.4 | 1 |
| Urban nonteaching | 44.3 | 44.3 | 1 | 47.0 | 47.0 | 1 |
| Urban teaching | 46.4 | 46.4 | 1 | 44.6 | 44.6 | 1 |
| Hospital region | ||||||
| Northeast | 11.8 | 11.8 | 1 | 11.3 | 11.3 | 1 |
| Midwest | 27.6 | 27.6 | 1 | 26.9 | 26.9 | 1 |
| South | 43.7 | 43.7 | 1 | 45.5 | 45.5 | 1 |
| West | 16.8 | 16.8 | 1 | 16.2 | 16.2 | 1 |
RTSA, reverse total shoulder arthroplasty; TSA, total shoulder arthroplasty; HA, hemiarthroplasty.
Categorical variables are presented as percentage. Continuous variables are presented as mean (range).
∗
Student t-test. All others with Pearson χ2 test.