title: Reliability, responsiveness and validity of Scalpdex in children with scalp psoriasis: the Dutch study.
abstract: This aim of this study was to validate the Scalpdex, a quality of life questionnaire for adults with scalp dermatitis, in children with scalp psoriasis. The reliability, responsiveness and validity of the 3 scales (symptoms, functioning and emotions) of this 22-item questionnaire were analysed in a cohort of children with scalp psoriasis (age range 6-18 years). A total of 94 children completed the questionnaire once, and 53 children a second time, after treatment of their scalp psoriasis. The Children's Scalpdex in Psoriasis (CSP) demonstrated reliability with internal consistency (Cronbach's α, 0.69-0.91). The CSP scales proved sensitive to change in the expected direction for children whose scalp psoriasis improved. Moderate effect sizes were observed between both visits for all 3 scales of the CSP (Cohen's d, 0.44-0.58). In conclusion, the CSP is a reliable, responsive and valid questionnaire, which is the first to illustrate the specific influence of scalp psoriasis on quality of life in children.
authors.affiliation: Department of Dermatology, Radboud University Nijmegen Medical Centre, PO Box 9101, 6500 HB Nijmegen, The Netherlands. a.oostveen@derma.umcn.nl.
authors.forename: Annet M
authors.initials: AM
authors.lastname: Oostveen
authors.forename: Elke M G J
authors.initials: EM
authors.lastname: Jong
authors.forename: Andrea W M
authors.initials: AW
authors.lastname: Evers
authors.forename: A Rogier
authors.initials: AR
authors.lastname: Donders
authors.forename: Peter C M
authors.initials: PC
authors.lastname: van de Kerkhof
authors.forename: Marieke M B
authors.initials: MM
authors.lastname: Seyger
mesh_terms: D000293:Adolescent; D002648:Child; D015331:Cohort Studies; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D009426:Netherlands; D011565:Psoriasis / Q000523:psychology*; D011788:Quality of Life; D015203:Reproducibility of Results; D012536:Scalp Dermatoses / Q000523:psychology*; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires