Initial Psychometric Validation of the Caregiver Atopic Dermatitis Control Tool

Area of Science:

• Dermatology
• Psychometrics
• Pediatrics

Background:

• The Atopic Dermatitis Control Tool (ADCT) is established for assessing eczema control in adolescents and adults.
• Recent FDA-recommended methodology led to the development of caregiver and child versions of the ADCT for pediatric populations.
• Existing tools may not fully capture eczema control from a caregiver's perspective in younger children.

Purpose of the Study:

• To psychometrically validate the Caregiver Atopic Dermatitis Control Tool (ADCT) for children aged 6 months to 11 years.
• To assess the reliability and validity of the Caregiver ADCT in a pediatric population.
• To establish an optimal score threshold for identifying children with uncontrolled eczema.

Main Methods:

• Initial psychometric validation involved 100 caregivers of children aged 6 months to 11 years.
• Assessed response distributions for floor and ceiling effects.
• Analyzed inter-item correlations, construct validity, and internal consistency (Cronbach's alpha).

Main Results:

• The Caregiver ADCT demonstrated no significant floor or ceiling effects, except for "sleep trouble nights."
• Strong inter-item correlations (r≥0.57) and construct validity (r≥0.59) were observed.
• High internal consistency was found (Cronbach's α = 0.92), with a score ≥7 identified as the optimal threshold for "not in control" eczema.

Conclusions:

• The Caregiver ADCT is a psychometrically sound tool for assessing eczema control in young children from a caregiver's perspective.
• The tool exhibits good reliability and validity, supporting its use in clinical trials and practice.
• An optimal threshold score of ≥7 reliably identifies children with inadequately controlled eczema.