Prevalence of comorbidities
| Comorbidity* | No. (%) of patients | |
|---|---|---|
| Ontario | United States | |
| History of percutaneous coronary intervention | 944 (0.8) | 8380 (2.0) |
| History of coronary artery bypass grafting | 301 (0.3) | 1706 (0.4) |
| Heart failure (congestive heart failure) | 28 993 (25.8) | 111 053 (26.8) |
| Unstable angina | 4444 (4.0) | 12 112 (2.9) |
| Atherosclerosis or other ischemic heart disease | 30 064 (26.7) | 81 293 (19.6) |
| Shock or cardiorespiratory failure | 8215 (7.3) | 37 850 (9.1) |
| Valvular heart disease | 2248 (2.0) | 14 038 (3.4) |
| Hypertension | 8729 (7.8) | 24 822 (6.0) |
| Cerebrovascular disease | 2980 (2.6) | 11 684 (2.8) |
| Renal disease | 12 216 (10.9) | 45 262 (10.9) |
| Chronic obstructive pulmonary disease or bronchitis | 7274 (6.5) | 30 767 (7.4) |
| Pneumonia | 10 501 (9.3) | 38 972 (9.4) |
| Diabetes | 7415 (6.6) | 19 437 (4.7) |
| Protein calorie malnutrition | 739 (0.7) | 2501 (0.6) |
| Dementia | 2120 (1.9) | 5354 (1.3) |
| Hemiplegia, paraplegia, paralysis, function disability | 1317 (1.2) | 4397 (1.1) |
| Peripheral vascular disease | 2772 (2.5) | 12 070 (2.9) |
| Metastatic cancer | 1237 (1.1) | 4959 (1.2) |
| Trauma | 3461 (3.1) | 12 078 (2.9) |
| Major psychiatric disorder | 1158 (1.0) | 2299 (0.6) |
| Acute or chronic liver disease | 520 (0.5) | 638 (0.2) |
↵* Includes conditions identified from claims associated with the index admission and admissions in the previous year except for history of percutaneous coronary intervention and history of coronary artery bypass grafting, for which only claims before the index admission were used.