12-Item Pruritus Severity Scale: Development and Validation of New Itch Severity Questionnaire

الملخص EN

Introduction.

A validated assessment of pruritus intensity is an important but still difficult clinical problem due to a subjective nature of this sensation.

Objective.

The aim of this study was the creation and validation of new itch severity questionnaire assessing pruritus intensity.

Material and Methods.

A total of 148 patients with pruritic dermatoses were asked to assess pruritus intensity using 12-Item Pruritus Severity Score (12-PSS) and Visual Analogue Scale (VAS).

Patients were also asked to complete the Dermatology Life Quality Index (DLQI) and Hospitality Anxiety and Depression Scale (HADS).

Test-retest comparison of 12-PSS was conducted in 102 subjects who completed the itch questionnaire twice with the 3- to 5-day interval.

Results.

We have created the 12-PSS assessing pruritus intensity (two questions), pruritus extent (one question) and duration (one question), influence of pruritus on concentration and patient psyche (four questions), and scratching as a response to pruritus stimuli (four questions).

A maximum scoring was 22 points.

The results showed strong consistency (Cronbach α coefficient 0.81).

A significant correlation was observed with VAS (r=0.58, p<0.001) and quality of life level according to DLQI (r=0.53, p<0.001).

Test-retest comparison in 102 subjects revealed a satisfactory reproducibility of achieved results (ICC = 0,72).

Conclusions.

The newly developed pruritus severity questionnaire may be used in daily clinical practice in the future.