We read with interest the Letter to the Editor concerning our recently published article
reporting on clusters to diagnose patellofemoral pain (PFP).
1
The author raised issues about possible risk of biases inherent to diagnostic accuracy
studies for musculoskeletal disorders. We propose further clarifications on our study.To read this article in full you will need to make a payment
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References
- Validity of combining history elements and physical examination tests to diagnose patellofemoral pain.Arch Phys Med Rehabil. 2018; 99: 607-614
- 2016 patellofemoral pain consensus statement from the 4th International Patellofemoral Pain Research Retreat, Manchester. Part 1: terminology, definitions, clinical examination, natural history, patellofemoral osteoarthritis and patient-reported outcome measures.Br J Sports Med. 2016; 50: 839-843
- Diagnostic validity and triage concordance of a physiotherapist compared to physicians’ diagnoses for common knee disorders.BMC Musculoskelet Disord. 2017; 18: 445
- The development of QUADAS: a tool for the quality assessment of studies of diagnostic accuracy included in systematic reviews.BMC Med Res Methodol. 2003; 3: 25
- A systematic review classifies sources of bias and variation in diagnostic test accuracy studies.J Clin Epidemiol. 2013; 66: 1093-1104
- Diagnostic accuracy and association to disability of clinical test findings associated with patellofemoral pain syndrome.Physiother Can. 2010; 62: 17-24
- A review of solutions for diagnostic accuracy studies with an imperfect or missing reference standard.J Clin Epidemiol. 2009; 62: 797-806
- Evaluation of diagnostic tests when there is no gold standard. A review of methods.Health Technol Assess. 2007; 11 (ix-51): iii
- The methodological quality of diagnostic test accuracy studies for musculoskeletal conditions can be improved.J Clin Epidemiol. 2014; 67: 416-424
Article info
Publication history
Published online: June 16, 2018
Footnotes
Disclosures: none.
Identification
Copyright
© 2018 by the American Congress of Rehabilitation Medicine
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- Concerns for Potential Risk of Bias in Diagnostic Validity Study of Patellofemoral PainArchives of Physical Medicine and RehabilitationVol. 99Issue 9
- PreviewI read a recent study examining the validity of diagnostic cluster to identify patellofemoral pain (PFP) conducted by Décary et al (2018).1 Many primary care practitioners may read this study with great interest because their diagnostic cluster does not require any expensive and invasive method with high diagnostic accuracy. However, readers have to be very careful to interpret the result of their study because there are 3 points that would potentially introduce the risk of bias.
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