PMID- 23203652 OWN - NLM STAT- MEDLINE DCOM- 20130923 LR - 20211021 IS - 1433-7339 (Electronic) IS - 0941-4355 (Linking) VI - 21 IP - 5 DP - 2013 May TI - The minimal clinical important difference in the World Health Organization Quality of Life instrument--100. PG - 1295-301 LID - 10.1007/s00520-012-1664-8 [doi] AB - PURPOSE: The aim of this study was to estimate the minimal clinical important difference (MCID) of the World Health Organization Quality of Life assessment instrument (WHOQOL-100) for women with early-stage breast cancer. If the MCID is known, then the instrument is also useful for individual patients and thus useful in clinical practice. In this study, the MCID is the smallest change in quality of life (QOL) scores considered clinically relevant for patients. METHODS: Data were derived from a prospective study in which 223 women with early-stage breast cancer and 383 women with benign breast problems completed the WHOQOL-100. MCID values were determined by two distribution-based methods (0.5 standard deviation (SD) and 1 standard error of measurement (SEM)) and an anchor-based method. RESULTS: For 0.5 SD, MCID estimates ranged from 0.64 to 0.94, and for 1 SEM, MCID estimates ranged from 0.69 to 1.18. The anchor-based approach resulted in MCID estimates ranging from -1.56 to -0.71 for decline and from 0.51 to 1.27 for improvement. CONCLUSION: A change in score of 1 on the WHOQOL-100 is proposed as the MCID for women with early-stage breast cancer. FAU - Den Oudsten, Brenda L AU - Den Oudsten BL AD - CoRPS-Center of Research on Psychology in Somatic Diseases, Department of Medical Psychology, Tilburg University, P.O. Box 90153, 5000 LE, Tilburg, the Netherlands. B.L.denOudsten@tilburguniversity.edu FAU - Zijlstra, Wobbe P AU - Zijlstra WP FAU - De Vries, Jolanda AU - De Vries J LA - eng PT - Journal Article DEP - 20121201 PL - Germany TA - Support Care Cancer JT - Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer JID - 9302957 SB - IM MH - Adult MH - Aged MH - Breast Diseases/pathology/*psychology MH - Breast Neoplasms/pathology/*psychology MH - Case-Control Studies MH - Female MH - Humans MH - Middle Aged MH - Neoplasm Staging MH - Prospective Studies MH - *Quality of Life MH - World Health Organization EDAT- 2012/12/04 06:00 MHDA- 2013/09/24 06:00 CRDT- 2012/12/04 06:00 PHST- 2012/06/05 00:00 [received] PHST- 2012/11/19 00:00 [accepted] PHST- 2012/12/04 06:00 [entrez] PHST- 2012/12/04 06:00 [pubmed] PHST- 2013/09/24 06:00 [medline] AID - 10.1007/s00520-012-1664-8 [doi] PST - ppublish SO - Support Care Cancer. 2013 May;21(5):1295-301. doi: 10.1007/s00520-012-1664-8. Epub 2012 Dec 1.