Table 1. Characteristics of Traditional Medicare and Medicare Advantage Patients Receiving Hip or Knee Replacement in Bundled Payment and Control MSAs.
| Characteristic | No. (%) | |||||||
|---|---|---|---|---|---|---|---|---|
| Traditional Medicare | Medicare Advantage | |||||||
| Bundled Payment MSA | Control MSA | Bundled Payment MSA | Control MSA | |||||
| Pre-CJRa | Post-CJRb | Pre-CJRa | Post-CJRb | Pre-CJRa | Post-CJRb | Pre-CJRa | Post-CJRb | |
| No. | 269 723 (100) | 195 520 (100) | 334 242 (100) | 242 925 (100) | 126 402 (100) | 99 130 (100) | 148 837 (100) | 119 608 (100) |
| Age, mean (SD), y | 73.4 (8.8) | 73.4 (8.5) | 73.2 (8.8) | 73.1 (8.5) | 73.4 (8.4) | 73.5 (8.2) | 73.2 (8.3) | 73.2 (8.2) |
| Dually eligiblec | 30 755 (11.4) | 21 391 (10.9) | 34 842 (10.4) | 24 704 (10.2) | 17 628 (13.9) | 14 498 (14.6) | 17 280 (11.6) | 14 685 (12.3) |
| Women | 171 882 (63.7) | 124 211 (63.5) | 212 213 (63.5) | 153 870 (63.3) | 82 729 (65.4) | 65 067 (65.6) | 96 233 (64.7) | 77 765 (65.0) |
| Elixhauser comorbidities, mean (SD), No.d | 2.4 (1.7) | 2.4 (1.6) | 2.3 (1.6) | 2.3 (1.6) | 2.4 (1.6) | 2.5 (1.7) | 2.4 (1.6) | 2.4 (1.6) |
| Race/ethnicity | ||||||||
| White | 340 938 (88.6) | 171 800 (87.9) | 429 906 (89.9) | 216 604 (89.2) | 145 294 (84.2) | 81 833 (82.6) | 176 190 (87.1) | 102 152 (85.4) |
| Black | 24 683 (6.4) | 12 470 (6.4) | 30 314 (6.3) | 15 419 (6.4) | 16 093 (9.3) | 10 079 (10.2) | 17 612 (8.7) | 11 289 (9.4) |
| Asian | 4518 (1.2) | 2438 (1.3) | 3208 (0.7) | 1725 (0.7) | 2296 (1.3) | 1416 (1.4) | 1465 (0.7) | 978 (0.8) |
| Hispanic | 5322 (1.4) | 2571 (1.3) | 4725 (1.0) | 2362 (1.0) | 4626 (2.7) | 2919 (2.9) | 2968 (1.5) | 2207 (1.9) |
| Native American or American Indian | 1029 (0.3) | 551 (0.3) | 1792 (0.4) | 947 (0.4) | 271 (0.2) | 170 (0.2) | 501 (0.3) | 247 (0.2) |
| Other or unknown | 8141 (2.1) | 5690 (2.9) | 8495 (1.8) | 5868 (2.4) | 4077 (2.4) | 2713 (2.7) | 3536 (1.8) | 2735 (2.3) |
| Diagnosis related group code | ||||||||
| 469, Major joint replacement with MCC | 14 344 (5.3) | 10 176 (5.2) | 16 680 (5.0) | 11 841 (4.9) | 5889 (4.7) | 4655 (4.7) | 6813 (4.6) | 5296 (4.4) |
| 470, Major joint replacement without MCC | 25 5379 (94.7) | 185 344 (94.8) | 317 562 (95.0) | 231 084 (95.1) | 120 513 (95.3) | 94 475 (95.3) | 142 024 (95.4) | 114 312 (95.6) |
Abbreviations: CJR, Comprehensive Care for Joint Replacement; MCC, major complications or comorbidities; MSA, metropolitan statistical area.
a
From 2013 to quarter 1 of 2016.
b
Quarter 2 and 3 of 2016.
c
Represents those who are dually eligible with Medicaid.
d
Based on diagnosis codes from Medicare Provider Analysis and Review Files during hospitalization for joint replacement operation alone.