Anonymous living donation expands access and enhances equity in pediatric liver transplantation: A retrospective cohort study
Bibliographic record
Abstract
Living donor liver transplantation (LDLT) confers the best survival to children with end-stage liver disease, yet racial and socioeconomic barriers often preclude access to a biologically or emotionally related donor. Anonymous nondirected LDLT (A-LDLT), whereby altruistic strangers donate, could close this gap and diminish reliance on deceased-donor LT (DDLT), but its equity and efficacy have not been fully quantified. We therefore analyzed all 422 consecutive pediatric liver transplants at a large Canadian center from January 2005 to March 2023. In this retrospective cohort study, we compared recipient demographics, clinical characteristics, waitlist duration, and survival outcomes across A-LDLT (n=62), directed living donor liver transplantation (n=174), and DDLT (n=186) groups. Children who underwent A-LDLT were disproportionately Black or Indigenous, more often lived in single-parent households, and more frequently spoke a non-English primary language, indicating that anonymous donation reached sociodemographically disadvantaged groups. After adjusting for age, diagnosis, era, and pediatric end-stage liver disease/MELD score, median wait time for cholestatic disease was 104 days with A-LDLT versus 138 days with DDLT-a 20% reduction-while operative complexity, vascular or biliary complication rates, and intensive-care stay were comparable to directed LDLT. One-, 5-, and 10-year patient survival rates after A-LDLT were 100%, 98% and 98%, respectively, mirroring directed living donor liver transplantation and exceeding DDLT (96%, 94%, and 93%). Graft survival showed the same pattern. Integrating anonymous nondirected donors enlarges the living donor pool, decreases time to transplantation for vulnerable children, and preserves the superior long-term outcomes achieved with living donor organs. Embedding A-LDLT alongside DDLT can reduce disparities and enable timely, life-saving transplantation for children without directed donors while maintaining the advantages associated with living donor grafts.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| 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 | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".