Table 1 Clinical and demographic characteristics of patients
From: Income and patient-reported outcomes (PROs) after primary total knee arthroplasty
| Â | Primary TKA, na (%) unless specified otherwise | |
|---|---|---|
| Â | 2 years (n = 7, 139) | 5 years, (n = 4, 234) |
Men/women | 3, 162 (44.3%)/3, 977 (55.7%) | 1903 (44.9%)/2, 331 (55.1%) |
Age, mean ± SD | 68.4 ± 10.0 | 68.4 ± 9.6 |
Age groups, n (%): | Â | Â |
≤ 60 years | 1, 313 (18.4%) | 745 (17.6%) |
> 60 to 70 years | 2, 531 (35.5%) | 1, 576 (37.2%) |
> 70 to 80 years | 2, 734 (38.3%) | 1, 617 (38.2%) |
> 80 years | 561 (7.9%) | 296 (7.0%) |
Body mass index, kg/m2: | Â | Â |
< 25 | 934 (13.1%) | 566 (13.4)% |
25 to 29.9 | 2, 479 (34.7%) | 1, 525 (36.0%) |
30 to 34.9 | 2, 092 (29.3%) | 1, 250 (29.5%) |
35 to 39.9 | 976 (13.7%) | 573 (13.5%) |
≥ 40 | 605 (8.5%) | 303 (7.2%) |
ASA score: | Â | Â |
Class I to II | 4, 115 (57.6%) | 2, 467 (58.3%) |
Class III to IV | 3, 006 (42.1%) | 1, 741 (41.1%) |
Deyo-Charlson Index, mean ± SD | 1.2 ± 1.9 | 1.1 ± 1.9 |
Key Deyo-Charlson comorbidities: | Â | Â |
Myocardial infarction | 341 (4.8%) | 202 (4.8%) |
Peripheral vascular disease | 370 (5.2%) | 190 (4.5%) |
Renal disease | 397 (5.6%) | 175 (4.1%) |
Chronic obstructive pulmonary disease | 762 (10.7%) | 408 (9.6%) |
Diabetes | 669 (9.4%) | 349 (8.2%) |
Connective tissue disease | 520 (7.3%) | 352 (8.3%) |
Anxiety | 465 (6.5%) | 220 (5.2%) |
Depression | 741 (10.4%) | 334 (7.9%) |
Distance from medical center: | Â | Â |
0 to 100 miles | 3, 669 (51.4%) | 2, 080 (49.1%) |
> 100 to 500 miles | 2, 731 (38.3%) | 1, 653 (39.0%) |
> 500 miles | 541 (7.6%) | 327 (7.7%) |
Diagnosis: | Â | Â |
Inflammatory arthritis | 256 (3.6%) | 189 (4.5%) |
Osteoarthritis | 6, 710 (94.0%) | 3, 922 (92.6%) |
Other | 172 (2.4%) | 123 (2.9%) |