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Accuracy of residual respiratory event detection by CPAPs: a meta-analysis

  • Sleep Breathing Physiology and Disorders • Original Article
  • Published:
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Abstract

Purpose

Most continuous positive airway pressure (CPAP) machines have built-in manufacturer-specific proprietary algorithms for automatic respiratory event detection (AED) based on very specific respiratory events scoring criteria. With regards to the accuracy of these data from CPAP machines, evidence from the literature seems conflicting, which formed the basis for this meta-analysis.

Methods

A meta-analysis was performed on studies that reported Bland-Altman analysis data on agreement (mean bias and limits of agreement [LoA]) of CPAP-determined apnea-hypopnea index (AHI) at therapeutic pressures (AHIFLOW) with that determined from simultaneously conducted polysomnograms (AHIPSG).

Results

In six studies, ResMed CPAPs were used, and in another six studies, Respironics CPAPs were used, while only one study used Fisher & Paykel (F&P) CPAPs. The pooled mean AHI bias from ResMed CPAP studies was − 1.01 with pooled LoAs from − 3.55 to 1.54 (I2 = 17.5%), and from Respironics CPAP studies, pooled mean AHI bias was − 0.59 with pooled LoAs from − 3.22 to 2.05 (I2 = 0%). Pooled percentage errors (corresponding to LoAs) from four ResMed CPAP studies, four Respironics CPAP studies, and the F&P CPAP study were 73%, 59%, and 112%, respectively. A review of the literature for this meta-analysis also revealed lack of uniformity not only in the CPAP manufacturers’ respiratory events scoring criteria but also in that used for PSGs across the studies analyzed.

Conclusions

Even though the pooled results of mean AHI bias suggest good clinical agreement between AHIPSG and AHIFLOW, percentage errors calculated in this meta-analysis indicate the possibility of a significant degree of imprecision in the estimation of AHIFLOW by CPAP machines.

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Data availability

On reasonable request, data can be made available.

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Authors and Affiliations

Authors

Contributions

IHI had full access to all extracted data and took responsibility for the integrity of these data and the accuracy of data analysis. IHI conceptualized the study, searched databases, extracted and analyzed data, and wrote the first draft of the manuscript. HJ contributed to the study’s quality assessment. AB contributed to the database search. OI contributed to Table 1. All authors contributed to editing and revising the manuscript.

Corresponding author

Correspondence to Imran H. Iftikhar.

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Ethical approval is not required for this type of study (meta-analysis of published studies).

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Informed consent is not required for this type of study (meta-analysis of published studies). Additionally, this article does not contain any studies with human participants performed by any of the authors.

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The authors declare no competing interests.

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Iftikhar, I.H., BaHammam, A., Jahrami, H. et al. Accuracy of residual respiratory event detection by CPAPs: a meta-analysis. Sleep Breath 27, 1759–1768 (2023). https://doi.org/10.1007/s11325-023-02780-w

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  • DOI: https://doi.org/10.1007/s11325-023-02780-w

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