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01-04-2008 | Uitgave 3/2008

Quality of Life Research 3/2008

EuroQol EQ-5D and condition-specific measures of health outcome in women with urinary incontinence: reliability, validity and responsiveness

Tijdschrift:
Quality of Life Research > Uitgave 3/2008
Auteurs:
Kirstie L. Haywood, Andrew M. Garratt, Ranjit Lall, Jan Fereday Smith, Sarah E. Lamb
Belangrijke opmerkingen
On behalf of the West Midlands Incontinence Research Collaboration.

Abstract

Objectives

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.

Methods

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.

Results

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.

Conclusion

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.

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