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Using Rasch measurement theory to assess the psychometric properties of a depressive symptoms scale in Norwegian adolescents

Kleppang, Annette Løvheim; Steigen, Anne Mari; Finbråten, Hanne Søberg
Peer reviewed, Journal article
Published version
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URI
https://hdl.handle.net/11250/2730623
Date
2020
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  • Artikkel - fagfellevurdert vitenskapelig / Articles - peer-reviewed [1618]
  • Publikasjoner fra Cristin - INN [1062]
Original version
10.1186/s12955-020-01373-5
Abstract
Background Scales measuring depressive symptoms in adolescents and adults are widely used for epidemiological purposes. The purpose of this study is to use Rasch measurement theory to examine the psychometric properties of a six-item scale intended to measure depressive symptoms in Norwegian adolescents. Methods The study is based on cross-sectional data from Ungdata, a survey conducted by the Norwegian Social Research Institute in cooperation with Regional Centres for Drug Rehabilitation in 2017. The target group comprised 13- to 19-years olds in Norway. Six items with four response categories, intended to measure depressive symptoms, were analysed. The analysis focused on invariance, including differential item functioning across gender and school levels. In addition, targeting, possible multidimensionality, response dependency, and the categorisation of the items were analysed. Results The scale measuring depressive symptoms shows good reliability and, on the whole, the items work well. However, one item, ‘had sleep problems’, clearly misfit and another, ‘worried too much about things’, works differently for males and females. Conclusions The scale has the potential to measure depressive symptoms in adolescents though there is room for improvement. To further improve the scale, the item concerning sleep problems should be rephrased.
Journal
Health and Quality of Life Outcomes

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