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Are "virtual" paediatric weight estimation studies valid?

Mike Wells1, Lara Goldstein1

  • 1Division of Emergency Medicine, Faculty of Health Sciences, University of the Witwatersrand, South Africa.

African Journal of Emergency Medicine : Revue Africaine De La Medecine D'Urgence
|March 16, 2019
PubMed
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Virtual weight estimation studies show accuracy similar to real-life assessments using Broselow and PAWPER tapes. However, real-world studies are still needed to account for human and patient factors.

Area of Science:

  • Pediatric Emergency Medicine
  • Clinical Biometrics
  • Medical Device Validation

Background:

  • Virtual studies comprise a significant portion of weight estimation research.
  • The validity of virtual weight estimation studies remains unevaluated.
  • Establishing validity is crucial for applying virtual study findings to clinical practice.

Purpose of the Study:

  • To evaluate the accuracy of virtual weight estimates from Broselow and PAWPER tapes.
  • To compare virtual estimates with actual real-life estimates obtained using these tapes.

Main Methods:

  • Generated virtual weights for Broselow and PAWPER tapes using anthropometric data from 1385 children.
  • Compared accuracy of virtual and real-life estimates against actual weights.
Keywords:
Broselow tapePAWPER tapePaediatric weight estimation

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  • Evaluated agreement between virtual and real-life estimates.

    • Main Results:

    • Percentage of estimates within 10% of actual weight: Broselow tapes (real: 57.9%, virtual: 59.3%), PAWPER tapes (real: 76.6%, virtual: 78.4%).
    • Cohen's kappa indicated substantial agreement for both real and virtual Broselow (0.65) and PAWPER (0.64) tapes.

    Conclusions:

    • Virtual and real weight estimates demonstrated comparable accuracy for both Broselow and PAWPER tapes.
    • Virtual studies should be supplemented with real-life studies to address human and patient factors impacting accuracy.