Table 1 Baseline Characteristics
Baseline Characteristics | Total N = 45 | Nominal Groups #1–6 | Nominal Groups #7 & 8 | |||
|---|---|---|---|---|---|---|
TKR N = 19 | THR N = 14 | Both TKR & THR N = 3 | TKR N = 2 | THR N = 7 | ||
Age (mean, years, Standard Deviation) | 64.4 ± 16.2 | 75.7 ± 8.2 | 65.9 ± 8.1 | 66.3 ± 5.4 | 32.5 ± 7.5 | 38.2 ± 6.7 |
Men, n (%) | 20 (40.4) | 6 (31.6) | 8 (57.1) | 1 (33.3) | 1 (50) | 4 (57.1) |
Black, n (%) | 7 (15.6) | 3 (15.8) | 3 (21.4) | – | – | 1 (14.3) |
Asian, n (%) | 1 (2.2) | – | – | 1 (33.3) | – | – |
Hispanic, n (%) | 2 (4.4) | – | – | – | – | 2 (28.6) |
Multi-race, n (%) | 3 (6.7) | 1 (5.3) | 1 (7.1) | – | 1 (14.3) | |
Education | ||||||
High school, n (%) | 1 (2.2) | – | 1(7.1) | – | – | |
Some college, n (%) | 5 (11.1) | 1(5.3) | 3(21.4) | – | 1 (14.3) | |
Trade/technical/vocational training | 1 (2.2) | – | – | – | – | 1 (14.3) |
College or above, n (%) | 36 (80.0) | 18 (94.7) | 10 (71.4) | 3 (100) | 2(100) | 3 (42.9) |
Employment | ||||||
Employed for wages, n (%) | 21 (46.7) | 3 (15.8) | 9 (64.3) | 3(100) | 2 (100) | 4 (57.1) |
Self-employed, n (%) | 9 (20.0) | 4 (21.1) | 3(21.4) | – | – | 2 (28.6) |
A homemakera | 1 (2.2) | – | – | – | – | 1 (14.3) |
Out of work but not looking for work, n (%) | 1 (2.2) | 1(5.3) | – | – | – | – |
Retired, n (%) | 13 (28.9) | 11 (57.9) | 2 (14.3) | – | – | – |
Reason for surgery | ||||||
Osteoarthritis, n (%) | 34 (75.6) | 13 (68.4) | 12 (85.7) | 3(100) | 1 (50) | 5 (71.4) |
Rheumatoid arthritis, n (%) | 3 (6.7) | 2 (10.5) | 1(7.1) | – | – | – |
PsA, SpA, Lupus, n (%) | 1 (2.2) | – | – | – | 1 (50) | – |
Other arthritis, n (%) | 4 (8.9) | 3 (15.8) | 1(7.1) | – | – | – |
Fracture, n (%) | 1 (2.2) | – | – | – | – | 1 (14.3) |
Avascular necrosis of the bone, n (%) | 2 (4.4) | 1(5.3) | – | – | – | 1 (14.3) |