Reliability and validity of the Japanese version of the Support Team Assessment Schedule (STAS-J)

Abstract

Objective: The aim of this project was to develop an appropriate and valid instrument for assessment by medical professionals in Japanese palliative care settings.Methods: We developed a Japanese version of the Support Team Assessment Schedule (STAS-J), using a back translation method, and tested its reliability and validity. In the reliability study, 16 nurses and a physician who work in a palliative care unit evaluated 10 hypothetical cases twice at 3-month intervals. For the validity study, external researchers interviewed 50 patients with matignancy and their families and compared the results with ratings by the nurses in the palliative care unit.Results: Our results with hypothetical cases were: interrater reliability weighted κ = 0.53–0.77 and intrarater reliability weighted κ = 0.64–0.85. In the validity study comparing nurse evaluations and the results of interviews with patients and families, complete agreement was 36–70%, and close agreement (±1) was 74–100%. As a whole, weighted κ were low: between −0.07 and 0.51. Our results were similar to those in the United Kingdom and Canada.Significance of results: Although this research was conducted under methodologically limited conditions, we concluded that the STAS-J is a reliable tool and its validity is acceptable. The STAS-J should become a valuable tool, not only for daily clinical use, but also for research.