P1-S2.51 Sexually transmitted HCV in MSM in Montreal
Bibliographic record
Abstract
Methods A retrospective analysis of the clients who attend the “Gay Screening Clinic” (GSC) at Clinique medical l'Actuel (Montreal, Canada) between May 2009 and April 2010 was conducted. Results Among the 1010 patients included in the analyses we found five cases of new HCV infection which seems to be acquired by sexual transmission. All of them were male and MSM, none of the cases had previous history of IDU, but three reported having had sexual relation with IDU partners. All of them were previously vaccinated for Hepatitis A and B and screened for HIV. None of them were coinfected with HIV, but one was coinfected with Syphilis and one with Gonorrhoea. Patients infected with HCV were older than non HCV patients (37 years vs 32 years) and had a higher number of sexual partners during the last 12 months (16 part. vs 9 for the non HCV patients). One of the HCV cases reported not having anal intercourse, two reported having had occasional unprotected anal intercourse and two reported always using condom for anal intercourse. Conclusions As in other urban centers, cases of sexually transmitted HCV had also been found in Montreal. This prevalence of 0.5% is very low compared to our HIV population in which the prevalence of sexually transmitted HCV is 3%. The particularity of MSM with recently acquired HCV by sexual transmission seems to be related to their engagement in sexual relation with high number of concurrent partners.
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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 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".