Development and Validation of a Chemotherapy-Induced Taste Alteration Scale

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Abstract

Purpose/Objectives:

To develop an instrument to assess the specific symptoms of chemotherapy-induced taste alterations.

Design:

Cross-sectional study.

Setting:

Two outpatient chemotherapy centers in Kanto, Japan.

Sample:

Convenience sample of 214 adult patients with chemotherapy-induced taste alterations.

Methods:

Items on the chemotherapy-induced taste alteration scale (CiTAS) were developed by a qualitative study of patients with taste alterations, and the content validity of each item was assessed by a panel of specialized oncology nurses. Data were analyzed for item consistency using Cronbach alpha and construct validity using factor analysis.

Main Research Variables:

Taste alterations, symptoms of discomfort, and impact of taste alterations on daily life.

Findings:

An 18-item scale was developed with four dimensions identified through factor analysis: decline in basic taste, discomfort, phantogeusia and parageusia, and general taste alterations. The scale demonstrated excellent reliability (Cronbach alpha = 0.9) and test-retest reliability (r = 0.94, p < 0.001, n = 28), as well as good validity, which was indicated by its strong correlation with a visual analog scale of the impact of taste alterations on daily life (r = 0.62, p < 0.001) and by negative correlations with Short Form–8 quality-of-life measures (physical component summary, r =.0.33; mental component summary, r = –0.47).

Conclusions:

The CiTAS enabled valid, reliable measurement of specific symptoms of chemotherapy-induced taste alterations.

Implications for Nursing:

The CiTAS has potential as a clinical tool and also could be used as a measure of chemotherapy-induced taste alterations in future studies.

Knowledge Translation:

The CiTAS may help evaluate the effectiveness of interventions to reduce the symptoms of taste alterations, such as administering zinc and self-care strategies.

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