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      Validity and Reliability of a New Instrument to Measure Cancer-Related Fatigue in Adolescents

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          Abstract

          Adolescents undergoing treatment for cancer rate fatigue as their most prevalent and intense cancer- and treatment-related effect. Parents and staff rate it similarly. Despite its reported prevalence, intensity, and distressing effects, cancer-related fatigue in adolescents is not routinely assessed during or after cancer treatment. We contend that the insufficient clinical attention is primarily due to the lack of a reliable and valid self-report instrument with which adolescent cancer-related fatigue can be measured. Our aim was to determine the reliability and construct validity of a new instrument and its ability to measure change in fatigue over time. Initial testing involved 64 adolescents undergoing curative treatment of cancer who completed the Fatigue Scale-Adolescent (FS-A) at two to four key points in treatment in one of four studies. Internal consistency estimates ranged from 0.67 to 0.95. Validity estimates involving the FS-A with the parent version ranged from 0.13 to 0.76; estimates involving the staff version and the Reynolds Depression Scale were 0.27 and 0.87, respectively. Additional validity findings included significant fatigue differences between anemic and nonanemic patients (P=0.042) and the emergence of four factors in an exploratory factor analysis. Findings further indicate that the FS-A can be used to measure change over time (t=2.55, P<0.01). In summary, the FS-A has moderate to strong reliability and impressive validity coefficients for a new research instrument.

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          Author and article information

          Journal
          Journal of Pain and Symptom Management
          Journal of Pain and Symptom Management
          Elsevier BV
          08853924
          December 2007
          December 2007
          : 34
          : 6
          : 607-618
          10.1016/j.jpainsymman.2007.01.009
          2813698
          17629669
          © 2007

          https://www.elsevier.com/tdm/userlicense/1.0/

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