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Reliability and validity of the PedsQL™ Multidimensional Fatigue Scale in Japan

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Abstract

Purpose

To examine the reliability and validity of the Japanese-language version of the PedsQL™ Multidimensional Fatigue Scale and to investigate the agreement between child self-reported fatigue and parent proxy-reported fatigue.

Methods

The Japanese-language version of the PedsQL™ Multidimensional Fatigue Scale was administered to 652 preschoolers and schoolchildren aged 5–12 and their parents, and to 91 parents of preschool children aged 1–4.

Results

Internal consistency reliability was 0.62–0.87 for children and 0.81–0.93 for parents. Known-group validity was examined between a group of healthy samples (n = 530) and chronic condition sample (n = 102); the chronically ill group reported a significantly higher perceived fatigue problem. Correlations between child self- and parent proxy reports ranged from poor to fair. In subgroups identified by cluster analysis based on child self-reported scores, the greatest agreement between child and parent reports was seen in the good HRQOL group, while the least occurred in the poor HRQOL group. The parents overestimated their child’s fatigue more when the child’s HRQOL was low.

Conclusion

The Japanese-language version of the PedsQL™ Multidimensional Fatigue Scale demonstrated good reliability and validity and could be useful in evaluating Japanese children in school and health care settings.

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Acknowledgments

We greatly appreciate the children and parents who participated in this study and the teachers who supported our research. We also appreciate Dr. James W. Varni, who gave us permission to develop the Japanese-language version of the PedsQL™ Multidimensional Fatigue Scale and provided great support during the process of development. This study was supported in part by grants from the Ministry of Education, Culture, Sports, Science, and Technology of Japan; grants from the Ministry of Health, Labor and Welfare of Japan; and funds from Suyama Research Foundation.

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Correspondence to Kyoko Kobayashi.

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Kobayashi, K., Okano, Y. & Hohashi, N. Reliability and validity of the PedsQL™ Multidimensional Fatigue Scale in Japan. Qual Life Res 20, 1091–1102 (2011). https://doi.org/10.1007/s11136-010-9834-y

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