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Reliability and Validity of Maximal Respiratory Pressures
Bruna M F Silveira1, Hugo L A Pereira1, Gabriela Chaves2
1The Rehabilitation Sciences Program at Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Maximal respiratory pressure measurements for inspiratory and expiratory muscle strength show moderate test-retest reliability but low inter-rater reliability. Concurrent validity is high, but more quality studies are needed.
Area of Science:
- Respiratory Physiology
- Clinical Measurement Validation
Background:
- Maximal respiratory pressures (maximal inspiratory pressure [PImax] and maximal expiratory pressure [PEmax]) are key indicators of respiratory muscle strength.
- Evaluating the reliability and validity of these measurements is crucial for accurate clinical assessment.
Purpose of the Study:
- To systematically review and evaluate the reliability and validity of maximal respiratory pressure measurements.
- To assess the quality of evidence for PImax and PEmax measurement properties.
Main Methods:
- Systematic review following COSMIN recommendations and PRISMA checklist.
- Searched PubMed and EMBASE databases for studies published before March 2023.
- Included 23 studies from an initial pool of 642 identified studies.
Main Results:
- Moderate test-retest reliability (ICC > 0.70) for both PImax and PEmax.
- Low inter-rater reliability for PImax and very low for PEmax (ICC > 0.70).
- Very low measurement error for both PImax and PEmax, and high concurrent validity (r > 0.80) for both.
Conclusions:
- Concurrent validity of maximal respiratory pressure measurements using manometers has high evidence.
- Improving the quality of clinical studies on measurement properties, adhering to guidelines like COSMIN, is recommended.
- Further research is needed to enhance the overall quality of maximal respiratory pressure measurements in clinical practice.
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