| Total hip arthroplasty (N = 11,848) | Total knee arthroplasty (N = 18,972) | ||||||
---|---|---|---|---|---|---|---|---|
 | RxRisk-V | Elixhauser | Charlson | Total | RxRisk-V | Elixhauser | Charlson | Total |
Mean score (SD) | 5.5 (3.3) | 0.9 (1.3) | 0.4 (0.8) | 6.2 (3.6) | 5.4 (3.5) | 0.9 (1.2) | 0.4 (0.7) | 6.1 (3.7) |
 | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) |
Cancer | Â | Â | Â | Â | Â | Â | Â | Â |
 Lymphoma | - | 42 (0.4) | - | 42 (0.4) | - | 33 (0.2) | - | 33 (0.2) |
 Malignancies | 423 (3.6) |  | 257 (2.2) | 648 (5.5) | 757 (4.0) |  | 285 (1.5) | 1,004 (5.3) |
 Metastatic cancer | - | 60 (0.5) | 60 (0.5) | 60 (0.5) | - | 43 (0.2) | 43 (0.2) | 43 (0.2) |
 Solid tumor without metastatis | - | 303 (2.6) | - | 306 (2.6) | - | 398 (2.1) | - | 398 (2.1) |
Cardiovascular/blood | Â | Â | Â | Â | Â | Â | Â | Â |
 Anticoagulation agents/coagulopathy | 6,230 (52.6) | 130 (1.1) | - | 6,274 (53.0) | 9,177 (48.4) | 168 (0.9) | - | 9,227 (48.6) |
 Antiplatelets agents | 3,975 (33.5) | - | - | 3,975 (33.5) | 6,055 (31.9) | - | - | 6,055 (31.9) |
 Arrhythmias | 1,206 (10.2) | 1,744 (14.7) | - | 2,313 (19.5) | 1,766 (9.3) | 2,561 (13.5) | - | 3,427 (18.1) |
 Cerebrovascular disease | - | - | 273 (2.3) | 273 (0.3) | - | - | 353 (1.9) | 353 (1.8) |
 Congestive heart failure | 1,454 (12.3) | 471 (4.0) | 471 (4.0) | 1,636 (13.8) | 2,142 (11.3) | 608 (3.2) | 608 (3.2) | 2,452 (12.9) |
 Hyperlipidaemia | 4,377 (36.9) | - | - | 4,377 (36.9) | 7,115 (37.5) | - | - | 7,115 (37.5) |
 Hypertensiona | 5,644 (47.6) | 2,612 (22.0) | - | 6,638 (56.0) | 8,866 (46.7) | 4,433 (23.4) | - | 10,629 (56.0) |
 Ischemic heart disease/angina | 1,375 (11.6) | - | - | 1,375 (11.6) | 2,054 (10.8) | - | - | 2,054 (10.8) |
 Ischemic heart disease/hypertension | 4,054 (34.2) | - | - | 4,054 (34.2) | 6,329 (33.4) | - | - | 6,329 (33.4) |
 Myocardial infarction | - | - | 333 (2.8) | 333 (2.8) | - | - | 410 (2.2) | 410 (2.2) |
 Peripheral vascular disease | - | 299 (2.5) | 299 (2.5) | 299 (2.5) | - | 346 (1.8) | 346 (1.8) | 346 (1.8) |
 Pulmonary circulation disorders | - | 136 (1.1) | - | 136 (1.2) | - | 288 (1.5) | - | 288 (1.5) |
 Valvular disease | - | 308 (2.6) | - | 308 (2.6) | - | 414 (2.2) | - | 414 (2.2) |
Endocrine | Â | Â | Â | Â | Â | Â | Â | Â |
 Diabetes (uncomplicated) | 905 (7.6) | 755 (6.4) | 838 (7.1) | 1,271 (10.7) | 1,782 (9.4) | 1,405 (7.4) | 1,530 (8.1) | 2,423 (12.8) |
 Diabetes (complicated) | - | 794 (6.7) | 747 (6.3) | 794 (6.7) | - | 1,452 (7.7) | 1387 (7.3) | 1,452 (7.7) |
 Hypothyroidism | 788 (6.7) | 67 (0.6) | - | 801 (6.8) | 1339 (7.1) | 95 (0.5) | - | 1,369 (7.2) |
 Pancreatic insufficiency | 20 (0.2) | - | - | 20 (0.2) | 31 (0.2) | - | - | 31 (0.2) |
Gastrointestinal | Â | Â | Â | Â | Â | Â | Â | Â |
 Gastric acid disorder | 5,307 (44.8) | - | - | 5,307 (44.8) | 8,436 (44.5) | - | - | 8,436 (44.5) |
 Inflammatory bowel syndrome | 118 (1.0) | - | - | 118 (1.0) | 180 (1.0) | - | - | 180 (1.0) |
 Hepatitis C | 0 (0.0) | - | - | 0 (0.0) | 0 (0.0) | - | - | 0 (0.0) |
 Liver disease (mild) | - | 25 (0.2) | 26 (0.2) | 33 (0.3) | - | 42 (0.2) | 47 (0.2) | 55 (0.3) |
 Liver disease (severe) or failure | 479 (4.0) | - | 11 (0.1) | 487 (4.1) | 542 (2.9) | - | 9 (<0.01) | 551 (2.9) |
 Peptic ulcer disease | - | 83 (0.7) | 119 (1.0) | 119 (1.0) | - | 102 (0.5) | 155 (0.8) | 155 (0.8) |
Muscuoskeletal/pain related | Â | Â | Â | Â | Â | Â | Â | Â |
 Gout | 1,187 (10.0) | - | - | 1,187 (10.0) | 2,210 (11.6) | - | - | 2,210 (11.7) |
 Migraine | 37 (0.3) | - | - | 37 (0.3) | 104 (0.5) | - | - | 104 (0.6) |
 Osteoporosis/Pagets | 1,463 (12.3) | - | - | 1,463 (12.3) | 2,017 (10.6) | - | - | 2,017 (10.6) |
 Pain | 6,512 (55.0) | - | - | 6,512 (55.0) | 9,663 (50.9) | - | - | 9,663 (50.9) |
 Pain/Inflammation | 6,958 (58.7) | - | - | 6,958 (58.7) | 10,611 (55.9) | - | - | 10,611 (55.9) |
 RA/collage vascular disorders | - | 197 (1.7) | 176 (1.5) | 197 (1.7) | - | 348 (1.8) | 320 (1.7) | 349 (1.8) |
Neurologic | Â | Â | Â | Â | Â | Â | Â | Â |
 Dementia | 92 (0.8) | - | 209 (1.8) | 249 (2.1) | 94 (0.5) | - | 195 (1.0) | 237 (1.3) |
 Epilepsy | 535 (4.5) | - | - | 535 (4.5) | 838 (4.4) | - | - | 838 (4.4) |
 Paralysis (or Paraplegia/Hemiplegia) | - | 86 (0.7) | 86 (0.7) | 86 (0.7) | - | 112 (0.6) | 112 (0.6) | 112 (0.6) |
 Parkinson’s disease | 198 (1.7) | - | - | 198 (1.7) | 367 (1.9) | - | - | 367 (1.9) |
 Other neurological disorders | - | 155 (1.3) | - | 155 (1.3) | - | 205 (1.1) | - | 205 (1.1) |
Nutritional/obesity | Â | Â | Â | Â | Â | Â | Â | Â |
 Blood loss anaemia | - | 84 (0.7) | - | 84 (0.7) | - | 67 (0.4) | - | 67 (0.4) |
 Deficiency anaemia | - | 203 (1.7) | - | 203 (1.7) | - | 223 (1.2) | - | 223 (1.2) |
 Fluid and electrolyte disorders | - | 890 (7.5) | - | 890 (7.5) | - | 1,095 (5.8) | - | 1,095 (5.8) |
 Hyperkalaemia | 8 (0.1) | - | - | 8 (0.1) | 18 (0.1) | - | - | 18 (0.1) |
 Malnutrition | 22 (0.2) | - | - | 22 (0.2) | 37 (0.2) | - | - | 37 (0.2) |
 Obesity | - | 194 (1.6) | - | 194 (1.6) | - | 500 (2.6) | - | 500 (2.6) |
 Weight loss | - | 123 (1.0) | - | 123 (1.0) | - | 99 (0.5) | - | 99 (0.5) |
Psychological/behavioural | Â | Â | Â | Â | Â | Â | Â | Â |
 Alcohol abuse/dependence | 11 (0.1) | 113 (1.0) | - | 120 (1.0) | 27 (0.1) | 177 (0.9) | - | 193 (1.0) |
 Anxiety and tension | 1,459 (12.3) | - | - | 1,459 (12.3) | 2,344 (12.3) | - | - | 2,340 (12.3) |
 Bipolar disorder | 30 (0.3) | - | - | 30 (0.3) | 49 (0.3) | - | - | 49 (0.3) |
 Depression | 2,598 (21.9) | 213 (1.8) | - | 2,667 (22.5) | 4,484 (23.6) | 293 (1.5) | - | 4,567 (24.1) |
 Drug abuse |  | 14 (0.1) | - | 14 (0.1) |  | 20 (0.1) | - | 20 (0.1) |
 Psychotic illness/psychoses | 250 (2.1) | 16 (0.1) | - | 259 (2.2) | 391 (2.1) | 22 (0.1) | - | 404 (2.1) |
 Smoking cessation | 102 (0.9) | - | - | 102 (0.9) | 159 (0.8) | - | - | 159 (0.8) |
Renal/urologic | Â | Â | Â | Â | Â | Â | Â | Â |
 Benign prostatic hypertrophy | 445 (3.8) | - | - | 445 (3.8) | 731 (3.9) | - | - | 731 (3.9) |
 Renal disease/failure | 162 (1.4) | 436 (3.7) | 388 (3.3) | 560 (4.7) | 290 (1.5) | 575 (3.0) | 524 (2.8) | 826 (4.4) |
Respiratory | Â | Â | Â | Â | Â | Â | Â | Â |
 Chronic pulmonary disease | - | 652 (5.5) | 651 (5.5) | 652 (5.5) | - | 858 (4.5) | 856 (4.5) | 858 (4.5) |
 Reactive airway disease | 2,461 (20.8) | - | - | 2,461 (20.8) | 3,815 (20.1) | - | - | 3,815 (20.1) |
 Tuberculosis | 0 (0.0) | - | - | 0 (0.0) | 1 (<0.01) | - | - | 1 (<0.01) |
Miscellaneous | Â | Â | Â | Â | Â | Â | Â | Â |
 Allergies | 1,660 (14.0) | - | - | 1,660 (14.0) | ,3046 (16.1) | - | - | 3,046 (16.1) |
 Glaucoma | 1,091 (9.2) | - | - | 1,091 (9.2) | 1,642 (8.7) | - | - | 1,642 (8.7) |
 HIV/AIDS | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
 Psoriasis | 63 (0.5) | - | - | 63 (0.5) | 103 (0.5) | - | - | 103 (0.5) |
 Steroid-responsive conditions | 1,889 (15.9) | - | - | 1,889 (15.9) | 3,345 (17.6) | - | - | 3,345 (17.6) |
 Transplant | 3 (<0.01) | - | - | 3 (<0.01) | 3 (<0.01) | - | - | 3 (<0.01) |