TABLE 2—
Most Responsible Diagnosis for Hospitalization of Study Participants: Toronto, Ontario, 2005–2009
| Most Responsible Diagnosisa | No. (%) |
| Medical/surgical hospitalizationsb | |
| Infectious and parasitic diseases | 38 (6.9) |
| Neoplasms | 23 (4.2) |
| Endocrine, nutritional and metabolic diseases | 17 (3.1) |
| Mental and behavioral disorders | 19 (3.5) |
| Diseases of the nervous system | 18 (3.3) |
| Diseases of the circulatory system | 48 (8.8) |
| Diseases of the respiratory system | 48 (8.8) |
| Diseases of the digestive system | 90 (16.4) |
| Diseases of the skin and subcutaneous tissue | 23 (4.2) |
| Diseases of the musculoskeletal system and connective tissue | 32 (5.8) |
| Diseases of the genitourinary system | 33 (6.0) |
| Symptoms, signs and abnormal clinical and laboratory findings | 34 (6.2) |
| Injury, poisoning and certain other consequences of external causes | 103 (18.8) |
| Factors influencing health status and contact with health services | 14 (2.6) |
| Other diagnoses | 8 (1.5) |
| Total | 548 (100.0) |
| Psychiatric hospitalizationsc | |
| Delirium, dementia, and amnestic and other cognitive disorders | 6 (1.6) |
| Substance-related disorders | 52 (13.9) |
| Schizophrenia and other psychotic disorders | 147 (39.4) |
| Mood disorders | 67 (18.0) |
| Adjustment disorders | 6 (1.6) |
| Personality disorders | 11 (2.9) |
| Other diagnoses | 10 (2.7) |
| Missing diagnosesd | 74 (19.8) |
| Total | 373 (100.0) |
For Canadian Institute for Health Information Discharge Abstract Database records: based on most responsible diagnosis using International Statistical Classification of Diseases and Related Health Problems, 10th Revision, Canadian Enhancement diagnostic codes. For Ontario Mental Health Reporting System (OMHRS) records: based on primary provisional diagnosis at admission using Diagnostic and Statistical Manual of Mental Disorders, 4th Revision diagnostic codes.
Among 227 (19.5%) homeless participants with medical or surgical hospitalizations during the study period.
Among 134 (11.5%) homeless participants with psychiatric hospitalization during the study period.
Before fiscal year 2008–2009, provisional diagnosis at admission was not a mandatory field in OMHRS for hospital stays < 72 hours.