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arXiv · 2610.35747

Correspondence Is Not Transfer: A Pairing-Controlled Audit of Clinical Audio-Metadata Alignment

Liu He·Xi Wang·Jiahong Yuan·Yuanchao Li
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Abstract

Clinical audio models increasingly align recordings with participant metadata or metadata-derived text. This supervision is useful but ambiguous: the paired target can contain symptoms, demographics, missingness, and cohort structure, not just disease information. We study this ambiguity by making the audio-metadata pairing itself the intervention. Our Pairing-Controlled Transfer Audit trains matched contrastive trajectories under correct pairing, global shuffling, disease-label-preserving shuffling, and label-and-recorded-sex-preserving shuffling. Each endpoint is then frozen and tested with three readouts: profile correspondence, attribute decodability, and matched disease prediction. On UKCOVID, correct improves retrieval and sex decodability over label-only shuffling, showing that the pairing intervention worked. The sex-probe contrast is largely absorbed by the sex-preserving control, while smaller retrieval differences remain. Disease-transfer contrasts, however, remain uncertain. After UKCOVID discovery fixed the pipeline, CODA TB, Cambridge COVID-19 Sounds, and Coswara were rerun as a locked external panel with the same arms, backbones, matching, readout, calibration, primary contrast, and primary metric. The external panel preserves the descriptive separation without proving a universal null. Successful profile correspondence and improved disease transfer are therefore different empirical claims.

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Liu He, Xi Wang, Jiahong Yuan, Yuanchao Li. 2026-10-26. Correspondence Is Not Transfer: A Pairing-Controlled Audit of Clinical Audio-Metadata Alignment. https://arxiv.org/abs/2610.35747

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