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To evaluate the measurement properties of the EuroQoL EQ-5D and two condition-specific patient-reported outcome measures--the Symptom Severity Index (SSI) and the Urinary Incontinence-Specific Quality of Life instrument (I-QoL)--in women with urinary incontinence.A questionnaire comprising all instruments was completed by women taking part in a clinical trial of physiotherapy for urinary incontinence. Follow-up questionnaires were at 6 weeks and 5 months. Data quality, internal consistency reliability, validity and responsiveness were assessed.One hundred and seventy-four patients taking part in the clinical trial completed the questionnaire. Instruments had low levels of missing data. The EQ-5D had a large ceiling effect and poor responsiveness. The SSI had poor validity and responsiveness. The I-QoL had levels of reliability that supported application in group assessment, and in some cases, individual assessment, and good evidence of validity. The I-QoL was the most responsive instrument at both 6 weeks and 5 months.The I-QoL was the best performing instrument and is recommended as a continence-specific measure of quality of life in a clinical trial setting. The SSI and EQ-5D are not recommended. Alternative generic instruments, which support economic evaluation, require further evaluation in trials of female urinary incontinence.

Original publication

DOI

10.1007/s11136-008-9311-z

Type

Journal article

Journal

Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation

Publication Date

04/2008

Volume

17

Pages

475 - 483

Addresses

Royal College of Nursing Research Institute, School of Health and Social Studies, Warwick University, Coventry CV4 5AL, UK. kirstie.haywood@rcn.org.uk

Keywords

Humans, Urinary Incontinence, Treatment Outcome, Health Status Indicators, Severity of Illness Index, Reproducibility of Results, Psychological Tests, Psychometrics, Health Status, Quality of Life, Middle Aged, Female, Surveys and Questionnaires