Refinement and Validation of the ItchyQoL using Classical Test Theory and Item Response Theory resulted in a reduction of the response categories from a 5-point to a 3-point scale.

In Dermatology
by ClinOwl March 25, 2021

The ItchyQoL is an itch-specific patient-reported outcome measure (PROM) assessing quality of life (QoL) in patients with chronic pruritus (CP). We aimed to assess and extend the psychometric properties of […]

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Refinement and Validation of the ItchyQoL using Classical Test Theory and Item Response Theory resulted in a reduction of the response categories from a 5-point to a 3-point scale.