Table 4.
Ascertainment of mental health conditions (given the context of our cohort, we excluded substance use and alcohol use disorder which were included in the source definition) [26]
| At least one hospitalization (CIHI-DAD or OMHRS) or ambulatory visit (NACRS) in the past 10 years with a diagnosis of ANY of the below diagnostic codes | |
| OR | |
| At least two visits in the past two years with a mental health diagnostic code (OHIP) | |
| Mental health diagnostic (ICD-9) codes: | |
| Psychotic Disorders | |
| 295 Schizophrenia | |
| 296 Manic-depressive psychoses, involutional melancholia | |
| 297 Other paranoid states | |
| 298 Other psychoses | |
| Non-Psychotic Disorders | |
| 300 Anxiety neurosis, hysteria, neurasthenia, obsessive-compulsive neurosis, reactive depression | |
| 301 Personality disorders | |
| 302 Sexual deviations | |
| 306 Psychosomatic illness | |
| 309 Adjustment reaction | |
| 311 Depressive disorder | |
| Social Problems | |
| 897 Economic problems | |
| 898 Marital difficulties | |
| 899 Parent-child problems | |
| 900 Problems with aged parents or in-laws | |
| 901 Family disruption/divorce | |
| 902 Education problems | |
| 904 Social maladjustment | |
| 905 Occupational problems | |
| 906 Legal problems | |
| 909 Other problems of social adjustment |
Ascertainment of HIV [27]
3 physician claims (International Classification of Diseases, Ninth Revision (ICD-9) code for HIV infection (042, 043, 044)) over a 3-year period (sensitivity and specificity of 96.2% (95% CI 95.2–97.9%) and 99.6% (95% CI 99.1–99.8%))