# Counterfactual Perturbation Analysis on UK Biobank Alzheimer's Disease cohort Source: [Counterfactual Perturbation Analysis on UK Biobank Alzheimer's Disease cohort]() Collection index: [llms.txt]() Data updated: 2026-05-14T08:05:24.412Z Evaluation of model robustness and fairness using counterfactual perturbation analysis techniques applied to the UK Biobank Alzheimer's Disease cohort, assessed via changes in specific feature deltas, such as tortuosity. A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage. | Scope | Recorded value | | --- | --- | | Task | Counterfactual Perturbation Analysis | | Dataset (including any stated split) | UK Biobank Alzheimer's Disease cohort | | Metric | Tortuosity Delta (4x) | | Unit | SCALAR | | Direction | Lower is better | | Results loaded | 1 of 1 | | Coverage | All results currently returned for this benchmark | Evaluation settings may differ between results. The original papers and recorded configurations are needed to establish comparability. A shared metric name alone does not establish an identical protocol. ## Metrics - [Tortuosity Delta (4x)](): Lower is better; unit: SCALAR. ## Recorded results | Method | Tortuosity Delta (4x) | Result date | Report paper | | --- | --- | --- | --- | | BTECF (disease-prompt) | 0.191 | Not recorded | 6a0556f3dbc836b87d828b82 | ### BTECF (disease-prompt) Tortuosity Delta (4x): 0.191. Result ID: 6a05813747f34ce924ec5131. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"Prompting Condition":"disease-prompt","Evaluation Subset (n)":"30","Pixdrop control / Tort. ratio":"∼1/1"}. This record does not assert independent reproduction. Page 1 of 1. This is an index page, not the full collection.