Measuring Patient Needs and Benefits in Dermatology using the Patient Benefit Index 2.0: A Validation Study

Area of Science:

• Dermatology
• Health Outcomes Research
• Psychometrics

Background:

• Assessing patient-relevant treatment benefit is crucial in dermatology.
• Existing instruments may be lengthy or lack specific validation.
• The Patient Benefit Index 2.0 (PBI 2.0) was developed as a concise measure.

Purpose of the Study:

• To evaluate the validity and feasibility of the PBI 2.0 in patients with various skin diseases.
• To assess the convergent validity, responsiveness, and test-retest reliability of the PBI 2.0.

Main Methods:

• Cross-sectional and longitudinal study designs were employed.
• Patients with skin diseases completed the PBI 2.0, quality of life measures, and disease-specific PBI long versions.
• Feasibility was assessed through patient ratings of comprehensibility, length, and readability.

Main Results:

• The PBI 2.0 was rated as easy to understand, complete, legible, and not too long by most patients.
• Low rates of missing values were observed.
• Good convergent validity was demonstrated across most disease groups, with satisfactory test-retest reliability.
• Responsiveness of the PBI 2.0 was not clearly confirmed.

Conclusions:

• The PBI 2.0 appears to be a suitable and broadly applicable instrument for assessing patient-relevant treatment benefits in diverse skin conditions.
• Its ease of use and validity support its use for cross-diagnosis comparisons.