The Electronic Faces Thermometer Scale (eFTS)-Construct Validity for Pain Assessment in Pediatric Postoperative Care

Angelica Höök1,2, Mia Hylén3,4, Maria Björk5

  • 1Institute of Health and Care Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.

Paediatric Anaesthesia
|September 22, 2025
PubMed

Insights

A new digital pain scale, the electronic Faces Thermometer Scale, effectively assesses pain in children post-surgery. This validated tool aligns with children's digital use for better pain management.

Area of Science:

  • Pediatric pain management
  • Digital health technologies
  • Clinical assessment tools

Background:

  • Undertreatment of pain in children necessitates improved assessment tools.
  • Digital scales can enhance pain reporting by aligning with children's technology use.
  • The electronic Faces Thermometer Scale (eFTS) was developed for digital pain self-reporting.

Purpose of the Study:

  • To validate the electronic Faces Thermometer Scale (eFTS) for convergent and discriminant validity.
  • To assess the eFTS in a pediatric postoperative setting.
  • To determine if the eFTS is a reliable digital pain assessment tool.

Main Methods:

  • The study involved 88 children in a pediatric surgery department, with 716 assessments.
  • Convergent validity was tested by comparing eFTS with the Colored Analogue Scale and Faces Pain Scale Revised.
  • Discriminant validity was assessed by comparing painful and non-painful situations using eFTS.

Main Results:

  • The eFTS showed statistically significant correlations (Kendall's Tau B: 0.61-0.79) with established scales.
  • The scale effectively discriminated pain across age groups and genders.
  • Significant differences were found between pre- and postoperative pain assessments (Clopper-Pearson: 0.70-0.90).

Conclusions:

  • The electronic Faces Thermometer Scale is a valid digital tool for pediatric postoperative pain self-reporting.
  • The eFTS demonstrates strong convergent and discriminant validity.
  • This digital scale can improve pain assessment in pediatric surgical care.
Abstract

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