title: Validation of the Korean Version of the Quality of Life-Cancer Survivors (QOL-CS-K) Questionnaire in Lymphoma Survivors.
abstract: OBJECTIVE
  The objective of this study was to validate the Korean version of the Quality of Life-Cancer Survivors (QOL-CS-K) in a sample of lymphoma survivors.
  
  
  METHODS
  We conducted a cross-sectional survey of lymphoma survivors who had survived for at least 24 months since diagnosis. Participants were recruited at the outpatient clinics and at a hospital event in a tertiary hospital in Seoul, Korea. Survivors were asked to complete the QOL-CS-K and the European Organization for Research and Treatment of Cancer Quality of Life Core Questionnaire (EORTC QLQ-C30) questionnaires. To determine test-retest reliability, a second questionnaire was sent to participants who completed the first questionnaire adequately. Exploratory factor analysis and Pearson's correlations were used for evaluating reliability and validity of the QOL-CS-K.
  
  
  RESULTS
  Among 257 survivors, 245 (95.3%) completed all questionnaires and had no missing data. The mean age of study participants was 52.2 years, 54.9% were men, and the mean time since diagnosis was 4.0±1.6 years. The Cronbach's α for the overall QOL-CS-K was 0.90, and the α coefficients for each subscale ranged from 0.73 to 0.83. The test and retest reliability was 0.88. Moderate correlations were found between comparable subscales of the QOL-CS-K and subscales of the EORTC QLQ-C30 (r=0.51-0.55) except for the spiritual well-being subscale of the QOL-CS-K, which did not correlate with any of the EORTC QLQ-C30 subscales (-0.08 to 0.16).
  
  
  CONCLUSIONS
  The QOL-CS-K is a reliable and valid scale for measuring the QOL in long-term lymphoma survivors.
authors.affiliation: Department of Clinical Research Design and Evaluation, SAIHST, Sungkyunkwan University, Seoul, Korea.|Cancer Education Center, Samsung Comprehensive Cancer Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.|Department of Health, Behavior and Society and Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
authors.forename: Juhee
authors.initials: J
authors.lastname: Cho
authors.affiliation: Department of Clinical Research Design and Evaluation, SAIHST, Sungkyunkwan University, Seoul, Korea.
authors.forename: Danbee
authors.initials: D
authors.lastname: Kang
authors.affiliation: Cancer Education Center, Samsung Comprehensive Cancer Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Im Ryung
authors.initials: IR
authors.lastname: Kim
authors.affiliation: Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Won Seog
authors.initials: WS
authors.lastname: Kim
authors.affiliation: Nursing Research & Education, City of Hope Medical Center, Duarte, CA, USA.
authors.forename: Betty
authors.initials: B
authors.lastname: Ferrell
authors.affiliation: Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.|Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea.
authors.forename: Seok Jin
authors.initials: SJ
authors.lastname: Kim
mesh_terms: D000073116:Cancer Survivors / Q000523:psychology*; D003430:Cross-Sectional Studies; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008223:Lymphoma / Q000401:mortality* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011788:Quality of Life / Q000523:psychology*; D015203:Reproducibility of Results; D056910:Republic of Korea; D011795:Surveys and Questionnaires
keywords: Lymphoma; Quality of life; Survival; Validation studies