Abstract
The aim of this study was to determine whether an existing outcome measure, the Interstitial Cystitis Symptom and Problem Index (ICSI/ICPI), is a valid, reliable, and clinically relevant instrument to assess the sensory urinary symptoms in women with fibromyalgia syndrome (FM). Ninety women with American College of Rheumatology 90 FM and who had at least two sensory bladder symptoms participated in the study. All underwent urological screening to exclude lower urinary tract pathology. All participants completed the following: ICSI/ICPI, Fibromyalgia Impact Questionnaire (FIQ), Medical Outcome Study Short Form 36, King’s Health Questionnaire (KHQ), and Vulval Symptom Assessment Scale. Assessment was made for internal consistency reliability, test–retest reliability, and concurrent validity. Factor analysis was used to assess the internal structure of the scale. Factor analysis displayed two separate components of symptom and problem combinations as distinct from the original ICSI/ICPI developed for the interstitial cystitis population. The eight items of the index configured differently and formed two subscales of a newly developed Fibromyalgia Bladder Index. The two subscales of this index include the Bladder Urgency and Pain Subscale and the Bladder Frequency and Nocturia Subscale. This index has high internal consistency reliability (Cronbach’s α coefficient of 0.81), test–retest reliability showing intraclass correlation of 0.85, and high concurrent validity through correlations between the Fibromyalgia Bladder Index and the KHQ (0.735, p = 0.000) and the FIQ (0.433, p = 0.000). This more specific configuration of the ICSI/ICPI better reflects FM bladder symptomatology. The Fibromyalgia Bladder Index is a validated FM-specific instrument that captures information about the sensory bladder symptoms and their impact in this fibromyalgia population. This instrument should allow for better understanding and management of this important fibromyalgia-associated problem.
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References
Bennett R (2002) Fibromyalgia. In: Wall P, Melzack R (eds) Textbook of pain. 4th edn. Churchill Livingstone, Edinburgh, pp 579–601
Clauw D, Schmidt M, Radulovic D, Singer A, Katz P, Bresette J (1997) The relationship between fibromyalgia and interstitial cystitis. J Psychiatr Res 31(1):125–131
Littlejohn G (1996) Fibromyalgia syndrome. Med J Aust 165:387–391
Wolfe F, Symthe H, Yunus M (1990) The American College of Rheumatology 1990 criteria for the classification of fibromyalgia: report of the multicentre criteria committee. Arthritis Rheum 33:160–172
Wassem R, McDonald M, Racine J (2002) Fibromyalgia: patient perspectives on symptoms, symptom management and provider utilization. Clin Nurse Spec 16(1):24–28
White KP, Speechley M, Harth M, Ostbye T (1999) The London Fibromyalgia Epidemiology Study: comparing the demographics and clinical characteristics in 100 random community cases of fibromyalgia versus controls. J Rheumatol 26:1577–1585
Sant G, Theoharides T (1999) Interstitial cystitis. Curr Opin Urol 9(4):297–302
Hanno P (1992) Interstitial cystitis and related diseases. In: Wash PC, Retik AB, Stamey TA, Vaughan ED (eds) Campbell’s urology. 6th edn. Saunders, Philadelphia, pp 631–662
Pinnock CB, Marshall VR (1997) Troublesome lower urinary tract symptoms in the community: a prevalence study. Med J Aust 167:72–75
Erickson D, Morgan K, Ordille S, Keay S, Xie S (2001) Nonbladder related symptoms in patients with interstitial cystitis. J Urol 166(2):557–562
Alagiri M, Chottiner S, Ratner V, Slade D, Hanno P (1997) Interstitial cystitis: unexplained associations with other chronic disease and pain syndromes. J Urol 49(Suppl 5A):52–57
Aaron LA, Burke MM, Buchwald D (2000) Overlapping conditions among patients with chronic fatigue syndrome, fibromyalgia, and temporomandibular disorder. Arch Intern Med 160(2230):221
Brookoff D (1997) The causes and treatments of pain in interstitial cystitis. In: Sant G (ed) Interstitial cystitis. Lippincott-Raven, Philadelphia
Clauw D (1995) The pathogenesis of chronic pain and fatigue syndromes with special reference to fibromyalgia. Med Hypotheses 44(5):369–378
O’Leary M, Sant G, Fowler F, Whitmore K, Spolarich-Kroll J (1997) The Interstitial Cystitis Symptom Index and Problem Index. J Urol 49(Suppl 5A):58–63
Lose G, Fantl J, Victor A et al (1998) Outcome measures for the research in adult women with symptoms of lower urinary tract dysfunction. Neurourol Urodyn 17(3):255–262
Burckhardt CS, Clark SR, Bennett RM (1991) The Fibromyalgia Impact Questionnaire: development and validation. J Rheumatol 18:728–733
Kelleher C, Cardozo L, Khullar VS (1997) A new questionnaire to assess the quality of life of urinary incontinent women. Br J Obstet Gynaecol 104:1374–1379
Ware JJ, Sherbourne C (1992) The MOS 36-item short-form health survey (SF-36). Conceptual framework and item selection. Med Care 30(6):473–483
Pallant J (2001) SPSS survival manual. Allen and Unwin, Sydney
Nunnally JC, Bernstein IH (1994) Psychometric theory, 3rd edn. McGraw Hill, New York
Carmines E, Zeller R (1979) Reliability and validity assessment. Sage, Newbury Park, CA
Waltz C, Strickland O, Lenz E (1991) Measurement in nursing research, 2nd edn. Davis, Philadelphia
Abrams P, Cardozo L, Fall M et al (2002) The standardisation of terminology of lower urinary tract function: report from the standardisation sub committee of the International Continence Society. Neurourol Urodyn 21(2):167–183
Middlelkoop H, den Doel Smilde D, Neven A, Kamphuisen H, Springer C (1996) Subjective sleep characteristics of 1485 males and females aged 50–93: effects of sex and age, and factors related to self-evaluation quality of sleep. J Gerontol Ser A Biol Sci Med Sci 51(3):M108–115
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Brand, K., Littlejohn, G., Kristjanson, L. et al. The Fibromyalgia Bladder Index. Clin Rheumatol 26, 2097–2103 (2007). https://doi.org/10.1007/s10067-007-0626-x
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DOI: https://doi.org/10.1007/s10067-007-0626-x