Table 1 Description of demographic and clinical characteristics of patients
Characteristics | Knee replacement (n = 9856) | Hip replacement (n = 10,837) | ||||
|---|---|---|---|---|---|---|
Follow-up | No follow-up | SMD | Follow-up | No follow-up | SMD | |
n (%) | 4349 (44%) | 5507 (56%) | NA | 4870 (47%) | 5967 (53%) | NA |
Sex: Female (n [%]) | 2601 (60%) | 3090 (56%) | 0.075 | 3161 (65%) | 3528 (59%) | 0.030 |
Age (median [IQR]) | 69 (62–75) | 72 (65–78) | 0.322 | 67 (60–73) | 71 (64–78) | 0.401 |
Ethnicity: White (n [%]) | 3314 (76%) | 4110 (75%) | 0.036 | 3737 (77%) | 4372 (73%) | 0.080 |
Year of surgery (median [IQR]) | 2005 (2003–2007) | 2006 (2004–2008) | 0.268 | 2005 (2003–2007) | 2006 (2003–2008) | 0.220 |
Follow-up visits (median [IQR]) | 3 (1–5) | NA | NA | 3 (1–4) | NA | NA |
Years from primary surgery to first follow-up visit (median [IQR]) | 5.9 (5.2–6.9) | NA | NA | 5.9 (5.2–6.9) | NA | NA |
Myocardial infarction (n [%]) | 12 (0.28%) | 20 (0.36%) | < 0.001 | 16 (0.32%) | 30 (0.50%) | < 0.001 |
Venous thromboembolism (n [%]) | 45 (1.03%) | 64 (1.16%) | < 0.001 | 68 (1.40%) | 78 (1.31%) | < 0.001 |
Prosthetic joint infection (n [%]) | 6 (0.14%) | 1 (0.02%) | NA | 2 (0.04%) | 4 (0.07%) | < 0.001 |
RCS Charlson (n [%]) | 0.018 | 0.027 | ||||
0 | 3489 (80.2%) | 4436 (80.6%) | 4083 (83.8%) | 4967 (83.2%) | ||
1 | 737 (16.9%) | 924 (16.8%) | 685 (14.1%) | 853 (14.3%) | ||
2 | 108 (2.5%) | 133 (2.4%) | 91 (1.9%) | 133 (2.2%) | ||
3+ | 15 (0.3%) | 14 (0.3%) | 11 (0.2%) | 14 (0.2%) | ||