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October 1, 2025Open Access

Predictive accuracy of the 2- and 8-item versions of the PHQ in measuring symptoms of depression: Brazilian National Health Survey (PNS) 2013-2019

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Authors

LOLilian Caroline Gonçalves de OliveiraBBBruna Carolina Rafael BarbosaMVMariana Cassemira Aparecida Vidigal

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Overview

Cross-sectional analysis reveals PHQ-8 has high predictive accuracy for depression, highlighting sociodemographic factors.

Key Points

  • The PHQ-8 achieved near-perfect agreement with PHQ-9, indicating high predictive accuracy for depression screening.
  • With an area under the curve (AUC) of 0.982, PHQ-8 showed 96.5% sensitivity and 100% specificity in detecting depressive symptoms.
  • Cross-sectional data from 148,733 individuals in the Brazilian National Health Survey were analyzed using ROC curve techniques.
  • Both PHQ-2 and PHQ-8 highlighted significant sociodemographic predictors for depressive symptoms, emphasizing women's elevated risk.

Cite This Study

Oliveira et al. (2025) studied this question.

synapsesocial.com/papers/68dd91d5fe798ba2fc498fd5https://doi.org/10.21203/rs.3.rs-7473964/v1
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