A1 Refereed original research article in a scientific journal
Validation of the short forms of the Pelvic Floor Distress Inventory (PFDI-20), Pelvic Floor Impact Questionnaire (PFIQ-7), and Pelvic Organ Prolapse/ Urinary Incontinence Sexual Questionnaire (PISQ-12) in Finnish
Authors: Mattsson NK, Nieminen K, Heikkinen AM, Jalkanen J, Koivurova S, Eloranta ML, Suvitie P, Tolppanen AM
Publisher: BIOMED CENTRAL LTD
Publication year: 2017
Journal: Health and Quality of Life Outcomes
Journal name in source: HEALTH AND QUALITY OF LIFE OUTCOMES
Journal acronym: HEALTH QUAL LIFE OUT
Article number: ARTN 88
Volume: 15
Number of pages: 7
ISSN: 1477-7525
DOI: https://doi.org/10.1186/s12955-017-0648-2
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/20684234
Background: Although several validated generic health-related quality of life instruments exist, disease-specific instruments are important as they are often more sensitive to changes in symptom severity. It is essential to validate the instruments in a new population and language before their use. The objective of the study was to translate into Finnish the short forms of three condition-specific questionnaires (PFDI-20, PFIQ-7 and PISQ-12) and to evaluate their psychometric properties in Finnish women with symptomatic pelvic organ prolapse.Methods: A multistep translation method was used followed by an evaluation of validity and reliability in prolapse patients. Convergent and discriminant validity, internal consistency and reliability via test-retest were calculated.Results: Sixty-three patients waiting for prolapse surgery filled the three questionnaires within two weeks. Response rate for each item was high in PFDI-20 and PISQ-12 (99.8 and 98.9% respectively). For PFIQ-7 response rate was only 60%. In PFIQ-7, six respondents (9.5%) reached the minimum value of zero showing floor effect. None of the instruments had ceiling effect. Based on the item-total correlations both PFIQ-7 and PFDI-20 had acceptable convergent validity, while the convergent validity of PISQ-12 was lower, r = 0.138-0.711. However, in this instrument only three questions (questions 6, 10 and 11) had r < 0.3 while others had r = 0.380. In the test-retest analysis all the three instruments showed good reliability (ICC 0.75-0.92). Similarly, the internal consistency of the instruments, measured by Cronbach's a, was good (range 0.69-0.96) indicating high homogeneity.Conclusions: Finnish validated translation of the PFDI-20 and PISQ-12 have acceptable psychometric properties and can be used for both research purposes and clinical evaluation of pelvic organ prolapse symptoms. The Finnish version of PFIQ-7 displayed low response rate and some evidence of a floor effect, and thus its use is not recommended in its current form.
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