Key result
Oximetry desaturation area methods using record-specific baselines best predict CVD mortality.
Why the study?
Published oximetry event desaturation transient area calculation methods differ in baseline and sampling window definitions, and it is unknown which combination is most effective for predicting CVD mortality.
Which oximetry event desaturation transient area-based method best predicts cardiovascular disease mortality in patients with obstructive sleep apnoea?
Cohort
Which oximetry event desaturation transient area-based method best predicts cardiovascular disease mortality in patients with obstructive sleep apnoea?
Oximetry event desaturation area methods using a record-specific baseline with either a fixed or record-specific sampling window are the most effective for predicting CVD mortality in patients with obstructive sleep apnoea.
Record-specific baseline desaturation area methods may refine CVD mortality prediction in OSA; leaves open prospective validation before clinical adoption.
Desaturation area-based parameters derived from oximetry have recently emerged as novel predictors of cardiovascular disease (CVD) mortality in the context of obstructive sleep apnoea (OSA). Various published calculation methods exist for event desaturation transient area calculation. The published methods differ in how they calculate the sampling window, and how they calculate the baseline. This study aims to evaluate the six possible combinations of baseline (event-specific, record-specific, or fixed) and sampling window (record-specific or fixed) to find an easy-to-calculate yet effective method area for predicting CVD mortality. The Sleep Heart Health Study data and corresponding CVD mortality outcomes were utilized. The predictive performance of each method was assessed by Cox proportional hazard regression analysis with adjustment for relevant covariates. Results show that an area method using a record-specific baseline and a fixed sampling window and an area method using a record-specific baseline and sampling window performed the best.
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He et al. (2024) conducted a cohort in Obstructive sleep apnoea. Oximetry event desaturation transient area calculation methods vs. Six possible combinations of baseline and sampling window was evaluated on Cardiovascular disease mortality. Oximetry event desaturation area methods using a record-specific baseline with either a fixed or record-specific sampling window performed best in predicting cardiovascular disease mortality.
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