The psychometric properties of the Korean version of the functional assessment of cancer therapy-cognitive (FACT-Cog) in Korean patients with breast cancer

Abstract

The Korean version of the FACT-Cog is a valid and reliable scale to measure self-reporting of cognitive impairment in patients with breast cancer who are undergoing chemotherapy.

Psychometric Properties of the 37-item Functional Assessment of Cancer Therapy-Cognitive Function (FACT-Cog) scale in Cancer Patients.

“…The scale had excellent internal consistency values: each of the subscales had excellent Cronbach's alpha values (over 0.8), supporting the appropriate reliability of this version. The values for the FACT-CogOTH and FACT-CogQOL were even higher than those reported in the rst validated French version (0.847 versus 0.7, and 0.954 versus 0.85, respectively) [15], and the Korean validation [16]. The test-retest reliability was also appropriate; the ICC between the test and retest was good for the total cognition score and all sub-scores, except for the FACT-Cog-QOL that had poor reliability, showing that the impact of cognition on QOL may differ across patients between chemotherapy cycles [2].…”

“…However, even after revision, this item might still capture, to some extent, a personality characteristic rather than a cognitive function. Moreover, as stated in both Chinese [6] and Korean [16] validation studies, this item and the CogM12 "I have had trouble remembering new information, like phone numbers or simple instructions" might not be suitable for today's context where technological advances reduce our need to recall information or use to-do lists. Therefore, memory items deserve to be revised again [5].…”

“…To the best of our knowledge, this is the rst study to validate the French version of the 37-item FACT-Cog scale in a population of Lebanese cancer patients, using exploratory factor analysis for the four subscales (FACT-Cog PCI, PCA, OTH, and QOL domains) as per scoring recommendations. Previous validations of the original English, the French, and the Korean version of FACT-Cog were performed on the 33-item scale without the multitasking components nor factor analysis, except for the Korean study [5,15,16]. Thus, comparing our results to theirs was not possible.…”

Prevalence of cognitive impairments following chemotherapy and its relationship to depression in Japanese breast cancer survivors: an exploratory study

“…In the three studies using FACT-Cog, the mean PCI scores and comments from others were 51-63 out of 72 and 15-16 out of 16, respectively. [31][32][33] Although these results are valuable to our understanding of the prevalence of PCI and the recognition of PCI by other people, it is difficult to directly compare these factors because the portion of the questionnaire dedicated to PCI and its recognition by other people was different. In the present study, we compared the prevalence of PCI and its recognition by other people using the same questionnaire.…”

Chemotherapy‐associated cognitive impairments in Korean cancer patients: Risk factors and functional outcome

“…The subscale had high internal‐consistency reliability and criterion validity . Its Korean version was validated with breast cancer patients . The subscale has 18 scoring items asking the frequency of occurrence over the past 7 days on a 5‐point Likert‐type scale ranging from 0, “never,” to 4, “several times a day.” Total scores ranged from 0 to 72.…”