CPAP Therapy Blood Pressure Effects in Sleep Apnea Patients

Jingjing Liu's umbrella review analyzes 17 systematic reviews and meta-analyses on CPAP therapy for obstructive sleep apnea. The review assesses methodological quality, reporting that only 3 of the 17 included reviews were rated as high quality. It evaluates evidence certainty, finding outcomes rated from high to very low quality.

Use Cases

• Analyze the distribution of evidence certainty ratings (high, moderate, low, very low) across outcomes from the GRADE assessment.
• Investigate the relationship between methodological quality scores from AMSTAR-2 and the conclusions drawn about CPAP's effect on blood pressure.
• Examine the citation overlap matrix and corrected coverage area (14.2%) to understand redundancy among primary studies in the included reviews.
• Compare the number of high-quality reviews (3) against low-quality ones (14) to contextualize the reliability of the overall findings on blood pressure reduction.

Strengths

• Provides a structured overview of 17 systematic reviews and meta-analyses on a specific clinical question.
• Includes quantitative assessments like a 14.2% corrected coverage area for citation overlap and quality ratings for 17 reviews.
• Applies multiple standardized evaluation tools (ROBIS, AMSTAR-2, PRISMA 2020, GRADE) for a multi-faceted quality assessment.

Limitations

• The dataset is a 12.1 KB document, not a structured data table, limiting direct computational analysis.
• The underlying evidence is characterized by low certainty, with 76 of 109 evaluated outcomes rated as low or very low quality.
• Substantial methodological weaknesses were identified, with 82.3% (14 out of 17) of the included reviews judged as low quality.

Provenance

Source

figshare, author Jingjing Liu.

Collection Method

Umbrella review conducting a systematic search of multiple databases (PubMed, Embase, Cochrane, etc.) from inception to December 1, 2025.

Time Range

Database searches covered from their inception to December 1, 2025.

Freshness

Last updated March 24, 2026.

Geography

Reviews included studies from international sources, with specific searches in Chinese databases (CNKI, VIP, Wanfang, CBM).