Catatonia is frequent in black immigrants admitted to Psychiatry in Canada
Bibliographic record
Abstract
Objective. To assess the prevalence of catatonia in a sample of patients of African ancestry admitted to Psychiatry in Canada. Methods. Retrospective chart review of 20 consecutive black francophone inpatients assessed by the same psychiatrist. Results. The sample consisted of 12 men and eight women aged 17-59 years. Catatonic symptoms were prominent in 30% of this small sample (n=6), more frequent than the 9% reported in a Canadian general psychiatry population of 140 inpatients (P=0.0126). Conclusions. This finding is limited by the small sample size and the provenance from troubled countries for most of the patients. It is consistent with earlier reports of a higher prevalence of catatonia in nonwhite subjects and among immigrants coming from developing countries, and stresses the importance of systematically assessing catatonia in clinical settings. Further research is warranted to distinguish between the effects of ethnic origin and immigrant status and to determine if the increased prevalence of catatonia is related to neurobiological causes such as maternal gestational infections or to socio-cultural factors.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".