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Structural validity and measurement invariance of the Japanese version of the Kessler Psychological Distress Scale (K6): an item response theory analysis
Background The Kessler Psychological Distress Scale (K6) is in widespread use to screen for psychological distress, but evidence to support the quality of the Japanese version (JK6) remains limited, in particular with respect to item response theory (IRT)-based item parameters and the test i
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