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The Lymphatic Malformation Function (LMF) Instrument.

Erin M Kirkham1, Todd C Edwards2, Edward M Weaver3

  • 1Department of Otolaryngology-Head and Neck Surgery, University of Washington, Seattle, Washington, USA ekirkham@uw.edu.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|July 22, 2015
PubMed
Summary
This summary is machine-generated.

The refined Lymphatic Malformation Function (LMF) instrument effectively measures signs and impacts in children with cervicofacial lymphatic malformation (LM). This validated 12-item tool demonstrates good reliability and criterion validity for assessing LM outcomes.

Keywords:
childdisease specificfactor analysisfunctionlymphatic malformationparent-reportpediatricproxyquality of lifetest-retest reliabilityvalidation

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Area of Science:

  • Pediatric Health Outcomes
  • Medical Device Development
  • Rare Disease Assessment

Background:

  • Cervicofacial lymphatic malformations (LM) present unique challenges in pediatric care.
  • Accurate measurement of treatment outcomes is crucial for effective management of LM.
  • Existing assessment tools may lack specificity or comprehensive outcome measurement.

Purpose of the Study:

  • To assess and refine the Lymphatic Malformation Function (LMF) instrument.
  • To evaluate the measurement properties, including criterion validity and test-retest reliability, of the LMF.
  • To develop a robust parent-report measure for pediatric cervicofacial LM.

Main Methods:

  • Cross-sectional study involving 60 children with cervicofacial LM across two pediatric centers.
  • The preliminary LMF instrument underwent item reduction based on response distributions and factor analysis.
  • Internal consistency (Cronbach's α), criterion validity (vs. stage), and test-retest reliability (ICC) were evaluated.

Main Results:

  • The LMF was refined to a 12-item, 2-domain instrument (Signs and Impacts) after item reduction.
  • The refined LMF demonstrated good internal consistency (Cronbach's α >0.80).
  • The instrument showed significant criterion validity (P < .05) and good test-retest reliability (ICC = 0.82).

Conclusions:

  • The refined 12-item LMF is a reliable and valid instrument for assessing outcomes in pediatric cervicofacial LM.
  • The LMF effectively measures LM-specific signs and impacts from a parent's perspective.
  • This validated instrument can aid in monitoring treatment efficacy and guiding clinical decisions for LM.