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Psychometric validation study of the Korean version of the Functional Assessment of Cancer Therapy-Vanderbilt Cystectomy Index

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  • Myong Kim
  • Seung-June Oh
  • Cheol Kwak
  • Hyeon Hoe Kim
  • Ja Hyeon Ku

Abstract

Purposes: To evaluate the reliability and validity of a Korean version of the Functional Assessment of Cancer Therapy (FACT)-Vanderbilt Cystectomy Index (VCI) in Korean patients who underwent radical cystectomy (RC) and urinary diversion (UD). Materials and methods: We prospectively recruited 108 RC and UD patients who did not have evidence of recurrence from 1994 December to 2015 March. All participants were instructed to complete the Korean FACT-VCI and Short-Form 36-Item Health Survey (SF-36; 1st measurement) and to repeat the Korean FACT-VCI survey one month later (2nd measurement). Statistical analysis included intraclass correlation, Cronbach’s α, time and UD type fixed mixed linear model, principal components analysis, and criterion-related validity with SF-36. Results: Korean FACT-VCI was internally consistent (α = 0.802) and had adequate test-retest reliability (interclass correlation = 0.803 and 0.822). The three components model of principal component analysis (cumulative explanatory power, 49.2%) confirmed the internal structural validity of the additional concerns (AC) component of the Korean FACT-VCI, and each component represented the “voiding problem”, “bowel problem”, and “social/functional problem with equivalent explanatory power (19.5%, 15.4%, and 14.4%). Korean FACT-VCI domain scores were generally well correlated with SF-36 domain scores (Pearson correlation coefficients range: 0.286–0.688; all p

Suggested Citation

  • Myong Kim & Seung-June Oh & Cheol Kwak & Hyeon Hoe Kim & Ja Hyeon Ku, 2018. "Psychometric validation study of the Korean version of the Functional Assessment of Cancer Therapy-Vanderbilt Cystectomy Index," PLOS ONE, Public Library of Science, vol. 13(1), pages 1-10, January.
    • Handle: RePEc:plo:pone00:0190570
    DOI: 10.1371/journal.pone.0190570
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