Table 5. Comparisons of Postoperative Utilization and Costs for Manual vs Robotic KA Patients.
| UKA | TKA | |||||
|---|---|---|---|---|---|---|
| mUKA (n = 6) | rUKA (n = 29) | P Value | mTKA (n = 58) | rTKA (n = 85) | P Value | |
| Home health visits | ||||||
| Patients with any, n (%) | 5 (83) | 5 (17) | 0.004a | 17 (29) | 5 (6) | .0002b |
| Mean (SD) | 1.8 (1.7) | 0.3 (0.8) | 0.0001b | 0.8 (2.0) | 0.1 (0.7) | <.0001b |
| Range | (0, 5) | (0, 4) | (0, 8) | (0, 6) | ||
| Home health costs | ||||||
| Patients with any, n (%) | 5 (83) | 4 (14) | 16 (28) | 5 (6) | .0005b | |
| Mean (SD) | 156 (188) | 18 (74) | .002a | 84 (261) | 17 (98) | .96 |
| Range | (0, 487) | (0, 390) | 0.64 | (0, 1280) | (0, 818) | |
| OP rehab visits | ||||||
| Patients with any, n (%) | 4 (67) | 21 (72) | 0.99 | 43 (74) | 73 (86) | .09 |
| Mean (SD) | 6.2 (6.0) | 9.9 (10.3) | .004a | 11.7 (10.5) | 12.8 (8.0) | .07 |
| Range | (0, 16) | (0, 42) | (0, 40) | (0, 39) | ||
| OP rehab costs | ||||||
| Patients with any, n (%) | 4 (67) | 21 (72) | .99 | 43 (74) | 72 (85) | .14 |
| Mean (SD) | 474 (556) | 792 (1003) | .28 | 826 (779) | 991 (878) | .73 |
| Range | (0, 1461) | (0, 5013) | (0, 2922) | (0, 4756) | ||
| Home rehab visits | ||||||
| Patients with any, n (%) | 5 (83) | 9 (31) | .03a | 31 (53) | 14 (16) | .0001b |
| Mean (SD) | 5 (4) | 2.0 (3.2) | .0002b | 3.9 (4.7) | 1.1 (2.8) | <.0001b |
| Range | (0, 12) | (0, 9) | (0, 20) | (0, 12) | ||
| Home rehab costs | ||||||
| Patients with any, n (%) | 5 (83) | 9 (31) | .03a | 31 (53) | 14 (16) | <.0001b |
| Mean (SD) | 609 (432) | 241 (382) | .74 | 482 (598) | 137 (331) | .66 |
| Range | (0, 1266) | (0, 1078) | (0, 2700) | (0, 1412) | ||
| Total rehab costs | ||||||
| Patients with any, n (%) | 6 (100) | 26 (90) | .99 | 57 (98) | 77 (91) | .08 |
| Mean (SD) | 1083 (593) | 1033 (968) | .83 | 1308 (752) | 1128 (852) | .55 |
| Range | (405, 1914) | (0, 5012) | (0, 3527) | (0, 4756) | ||
| Total postoperative costs | ||||||
| Patients with any, n (%) | 6 (100) | 26 (90) | .99 | 57 (100) | 77 (91) | .08 |
| Mean (SD) | 1239 (571) | 1051 (968) | .75 | 1602 (1226) | 1196 (974) | .10 |
| Range | (405, 1932) | (0, 5013) | (0, 7322) | (0, 5306) |
Abbreviations: KA, knee arthroplasty; mTKA, manual total knee arthroplasty; manual unicompartmental knee arthroplasty; OP, outpatient; rTKA, robotic arm–assisted total knee arthroplasty; rUKA, robotic arm–assisted unicompartmental knee arthroplasty; TKA, total knee arthroplasty; UKA, unicompartmental knee arthroplasty.
aP < .05.
bP < .001.