Anatomical Predictors of Venous Thromboembolism Recurrence after Isolated Superficial Vein Thrombosis
Bibliographic record
Abstract
Abstract Background: Isolated superficial vein thrombosis (iSVT) (i.e. without concurrent deep-vein thrombosis or pulmonary embolism) is a frequent event. Its clinical significance and management are controversial. Data on long-term follow-up are scarce and the impact of anatomical characteristics of iSVT on the risk of venous thromboembolism (VTE) (DVT and/or PE) recurrence has not been assessed. Objective: To determine the impact of anatomical characteristics of iSVT on the long-term risk of VTE recurrence. Methods: Using data from the The OPTIMEV (OPTimisation de l'Interrogatoire dans l'_evaluation du risque throMbo-Embolique Veineux) study, a prospective, observational, multicenter study, we assessed at 3 years in patients recruited for an objectively confirmed iSVT i) cumulative rates of DVT, PE and SVT recurrences using the Kaplan-Meier method; and ii) anatomical predictors of VTE recurrence (SVT involving the sapheno-femoral junction (i.e. ≤3 cm), SVT of the trunk of the great saphenous vein, bilateral SVT, SVT occurring in a varicose vein (i.e. C≥2 according to CEAP classification) using a Cox multivariable model adjusted for age, sex, cancer and personal history of VTE. At baseline, all patients with SVT underwent a complete bilateral swhole leg ultrasound to exclude concurrent DVT and during follow-up, all suspected VTE recurrences were confirmed/ruled out with objective tests. All recurrences were centrally adjudicated by the study's expert committee. Results: Among the 479 recruited patients with iSVT, 12.5% (n=60) had a thrombotic recurrence during the 3 years of follow-up. Cumulative rates of recurrence as a PE, DVT and iSVT were 1.9%, 4.8% and 5.8%, respectively. In multivariate analysis, a thrombus involving the sapheno-femoral junction at baseline independently increased the risk of VTE recurrence (HR=3.34 [1.5-7.2]). Presence of varicose veins also increased the risk but this result did not reach statistical significance (HR=1.8 [0.9 - 3.9], p=0.11). Conclusion: In an unselected population of patients with iSVT, long-term risk of VTE recurrence is substantial. Involvement of the sapheno-femoral junction is a strong independent predictor of VTE during the subsequent 3 years. Our results suggest the need for more aggressive management and follow-up of patients with iSVT exhibiting this anatomical characteristic. Disclosures Galanaud: Daichi: Membership on an entity's Board of Directors or advisory committees, Research Funding; bayer: Membership on an entity's Board of Directors or advisory committees, Research Funding. Sevestre:bayer: Membership on an entity's Board of Directors or advisory committees, Research Funding; Daichi: Membership on an entity's Board of Directors or advisory committees, Research Funding. Pernod:pfizer: Consultancy; leo: Consultancy; bristol meyers: Consultancy; Daichi: Consultancy; bayer: Consultancy. Brisot:bayer: Membership on an entity's Board of Directors or advisory committees; daichi: Membership on an entity's Board of Directors or advisory committees. Quéré:3-M: Research Funding; thuasne: Research Funding; aspen: Research Funding; daichi: Membership on an entity's Board of Directors or advisory committees; bayer: Membership on an entity's Board of Directors or advisory committees; leo: Membership on an entity's Board of Directors or advisory committees.
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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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| 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".