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Validation of a quality-of-life scale for women with bladder pain syndrome/interstitial cystitis

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Abstract

Purpose

To validate a disease-specific scale to measure the impact of symptoms of bladder pain syndrome/interstitial cystitis (BPS/IC), a condition that affects up to 6.5% of US women.

Methods

Participants were drawn from the RAND Interstitial Cystitis Epidemiology (RICE) Study, a telephone probability survey of 146,231 US households. Women who met RICE BPS/IC symptom criteria (n = 3,397) completed the 6-item RAND Bladder Symptom Impact scale (RICE BSI-6). The RICE BSI-6 was adapted from a scale used to assess the impact of diabetes on life and sexuality and modified based on expert input on face validity and focus group work; items specific to diabetic symptoms were eliminated. Validated scales of symptom severity, mental- and physical-health-related quality of life (QoL), depression, coping, and perceived control were used to assess convergent validity.

Results

The RICE BSI-6 (α = 0.92) was significantly related to greater symptom severity, worse general mental- and physical-health-related QoL, more severe depression symptoms, and lower perceived control over life in general and over BPS/IC symptoms (P values < .05). It was also associated with less use of distancing coping (P < .05).

Conclusion

The RICE BSI-6 shows excellent internal consistency and strong convergent validity. It can be used to examine the effects of psychosocial and treatment interventions on QoL among women with BPS/IC.

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Abbreviations

BPS/IC:

Bladder pain syndrome/interstitial cystitis

RICE:

RAND Interstitial Cystitis Epidemiology Study

RICE BSI-6:

RICE Bladder Symptom Impact Scale (6 items)

PDMQ:

Perceptions of Diabetes Mellitus Questionnaire

PHQ-8:

Patient Health Questionnaire (8 items)

QoL:

Quality of life

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Acknowledgments

This research was supported by U01 DK 070234 from the National Institutes of Health.

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Correspondence to Laura M. Bogart.

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Bogart, L.M., Suttorp, M.J., Elliott, M.N. et al. Validation of a quality-of-life scale for women with bladder pain syndrome/interstitial cystitis. Qual Life Res 21, 1665–1670 (2012). https://doi.org/10.1007/s11136-011-0085-3

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  • DOI: https://doi.org/10.1007/s11136-011-0085-3

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