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Response to Letter to the Editor regarding “Concerns for Potential Risk of Bias in Diagnostic Validity Study of Patellofemoral Pain”

      We read with interest the Letter to the Editor concerning our recently published article reporting on clusters to diagnose patellofemoral pain (PFP).
      • Décary S.
      • Frémont P.
      • Pelletier B.
      • et al.
      Validity of combining history elements and physical examination tests to diagnose patellofemoral pain.
      The author raised issues about possible risk of biases inherent to diagnostic accuracy studies for musculoskeletal disorders. We propose further clarifications on our study.
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      References

        • Décary S.
        • Frémont P.
        • Pelletier B.
        • et al.
        Validity of combining history elements and physical examination tests to diagnose patellofemoral pain.
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      Linked Article

      • Concerns for Potential Risk of Bias in Diagnostic Validity Study of Patellofemoral Pain
        Archives of Physical Medicine and RehabilitationVol. 99Issue 9
        • Preview
          I 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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