Paper
Beyond Performance Reporting: subject-wise evaluation of fiducial quality and demographic effects on handcrafted PPG features for cuffless BP (PulseDB)
SSRN preprint (posted ~2026-07-04 per SSRN listing); code GitHub 2026-09-22, MIT
TL;DR
Subject-wise LightGBM evaluation on PulseDB (VitalDB partition) showing handcrafted PPG features capture only about 20% of BP variance on unseen subjects, so fiducial-quality filtering and demographic stratification cannot be reliably stress-tested as conditioning factors. Quality filtering does change feature distributions, and PPG features still beat demographics-only predictors, but transferable explained variance stays flat. MIT code ships pyPPG overrides, a fiducial QC pipeline, LightGBM experiments, SHAP and bootstrap/equivalence tests.
- Form factor: clinical finger/perioperative (PulseDB VitalDB partition)
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Cite this paper
Saldarriaga-Echeverri, F., Arbelaez-Salazar, J., Kyriacou, P. A., & Li, L. (2026). Beyond Performance Reporting: subject-wise evaluation of fiducial quality and demographic effects on handcrafted PPG features for cuffless BP (PulseDB). SSRN preprint. https://papers.ssrn.com/sol3/papers.cfm?abstract_id=7048080
Saldarriaga-Echeverri, Felipe, Juan Arbelaez-Salazar, Panicos A. Kyriacou, and Ling Li. 2026. "Beyond Performance Reporting: subject-wise evaluation of fiducial quality and demographic effects on handcrafted PPG features for cuffless BP (PulseDB)." SSRN preprint. https://papers.ssrn.com/sol3/papers.cfm?abstract_id=7048080.
Saldarriaga-Echeverri, F., Arbelaez-Salazar, J., Kyriacou, P. A. and Li, L. (2026) 'Beyond Performance Reporting: subject-wise evaluation of fiducial quality and demographic effects on handcrafted PPG features for cuffless BP (PulseDB)', SSRN preprint. Available at: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=7048080
Saldarriaga-Echeverri, Felipe, et al. "Beyond Performance Reporting: subject-wise evaluation of fiducial quality and demographic effects on handcrafted PPG features for cuffless BP (PulseDB)." SSRN preprint, 2026. https://papers.ssrn.com/sol3/papers.cfm?abstract_id=7048080.
F. Saldarriaga-Echeverri, J. Arbelaez-Salazar, P. A. Kyriacou, and L. Li, "Beyond Performance Reporting: subject-wise evaluation of fiducial quality and demographic effects on handcrafted PPG features for cuffless BP (PulseDB)," SSRN preprint, 2026, [Online]. Available: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=7048080.
@misc{saldarriagaecheverri2026beyond,
title = {{Beyond Performance Reporting: subject-wise evaluation of fiducial quality and demographic effects on handcrafted PPG features for cuffless BP (PulseDB)}},
author = {Saldarriaga-Echeverri, Felipe and Arbelaez-Salazar, Juan and Kyriacou, Panicos A. and Li, Ling},
year = {2026},
howpublished = {SSRN preprint},
url = {https://papers.ssrn.com/sol3/papers.cfm?abstract_id=7048080}
}Added to the ChatPPG research hub
