Validation of the Korean version of the Quality of Life-Cancer Survivors (QOL-CS-K) questionnaire in lymphoma survivors

Juhee Cho, Danbee Kang, Im Ryung Kim, Won Seog Kim, Betty Ferrell, Seok Jin Kim

Research output: Contribution to journalArticle

Abstract

Purpose 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. Materials and 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 QOLCS- 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 # for the overall QOL-CS-K was 0.90, and the # 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 QLQC30 subscales (-0.08 to 0.16).Conclusion The QOL-CS-K is a reliable and valid scale for measuring the QOL in long-term lymphoma survivors.

Original languageEnglish (US)
Pages (from-to)204-211
Number of pages8
JournalCancer Research and Treatment
Volume50
Issue number1
DOIs
StatePublished - Jan 1 2018
Externally publishedYes

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Survivors
Lymphoma
Quality of Life
Reproducibility of Results
Neoplasms
Korea
Ambulatory Care Facilities
Tertiary Care Centers
Statistical Factor Analysis
Surveys and Questionnaires
Cross-Sectional Studies
Organizations
Research

Keywords

  • Lymphoma
  • Quality of life
  • Survival
  • Validation studies

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this

Validation of the Korean version of the Quality of Life-Cancer Survivors (QOL-CS-K) questionnaire in lymphoma survivors. / Cho, Juhee; Kang, Danbee; Kim, Im Ryung; Kim, Won Seog; Ferrell, Betty; Kim, Seok Jin.

In: Cancer Research and Treatment, Vol. 50, No. 1, 01.01.2018, p. 204-211.

Research output: Contribution to journalArticle

Cho, Juhee ; Kang, Danbee ; Kim, Im Ryung ; Kim, Won Seog ; Ferrell, Betty ; Kim, Seok Jin. / Validation of the Korean version of the Quality of Life-Cancer Survivors (QOL-CS-K) questionnaire in lymphoma survivors. In: Cancer Research and Treatment. 2018 ; Vol. 50, No. 1. pp. 204-211.
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abstract = "Purpose 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. Materials and 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 QOLCS- 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 # for the overall QOL-CS-K was 0.90, and the # 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 QLQC30 subscales (-0.08 to 0.16).Conclusion The QOL-CS-K is a reliable and valid scale for measuring the QOL in long-term lymphoma survivors.",
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AU - Kim, Seok Jin

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N2 - Purpose 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. Materials and 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 QOLCS- 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 # for the overall QOL-CS-K was 0.90, and the # 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 QLQC30 subscales (-0.08 to 0.16).Conclusion The QOL-CS-K is a reliable and valid scale for measuring the QOL in long-term lymphoma survivors.

AB - Purpose 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. Materials and 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 QOLCS- 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 # for the overall QOL-CS-K was 0.90, and the # 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 QLQC30 subscales (-0.08 to 0.16).Conclusion The QOL-CS-K is a reliable and valid scale for measuring the QOL in long-term lymphoma survivors.

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KW - Survival

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