Psychometric evaluation of a four-item scale derived from the PHQ-9 and GAD-7 among community adults based on multivariate generalizability theory and item response theory.

Front Psychol · 2026 · PMC13260393 · PMID 42293903

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closest p

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an increasing trendno p-value reported

The threshold parameters ( b ) of all items in the GAD-7 and the PHQ-9 showed an increasing trend.

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