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Gepubliceerd in: Quality of Life Research 6/2013

01-08-2013 | Brief Communication

Score equivalence of electronic and paper versions of the Social Difficulties Inventory (SDI-21): a randomised crossover trial in cancer patients

Auteurs: Laura Ashley, Ada Keding, Julia Brown, Galina Velikova, Penny Wright

Gepubliceerd in: Quality of Life Research | Uitgave 6/2013

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Abstract

Purpose

The Social Difficulties Inventory (SDI-21) assesses everyday problems experienced by cancer patients, including difficulties with self-care, work and relationships. Early development and psychometric evaluation studies have validated the SDI-21 for computer administration. However, several recent studies have administered the SDI-21 on paper. We sought to test the score equivalence of electronic and paper versions of the SDI-21.

Methods

A randomised two-arm crossover trial in a sample of cancer patients with varied diagnoses. Patients completed electronic (via the internet) and paper versions of the SDI-21, with half randomly assigned to complete the electronic version first (n = 51) and half the paper version first (n = 60). Patients were asked to complete both versions at home, within 2 weeks. Analyses were performed for the SDI-21 summary score and three subscales.

Results

Score distributions and internal reliabilities for the paper and electronic versions were highly similar. There were no significant differences between mean summary or subscale scores for the two administration modes. All mean score differences (all <0.25 of a scale point) were well below the SDI-21’s established minimally important differences, and all 95 % confidence intervals were narrow and included zero. Intraclass correlations between paper and electronic scores were uniformly high and significant (all ≥0.85) and above the standard acceptable level of reliability.

Conclusions

Paper and electronic versions of the SDI-21 can be considered equivalent and used interchangeably. This is important because, despite the growth of electronic formats, paper versions are currently still necessary to ensure inclusive use of the SDI-21 with representative samples.
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Metagegevens
Titel
Score equivalence of electronic and paper versions of the Social Difficulties Inventory (SDI-21): a randomised crossover trial in cancer patients
Auteurs
Laura Ashley
Ada Keding
Julia Brown
Galina Velikova
Penny Wright
Publicatiedatum
01-08-2013
Uitgeverij
Springer Netherlands
Gepubliceerd in
Quality of Life Research / Uitgave 6/2013
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-012-0242-3