Abstract
BACKGROUND: Patients with mood and anxiety disorders commonly visit primary care providers in Canada. Screening tools can support providers in identifying patients who need further mental health care. OBJECTIVES: Identify screening tools that are valid and reliable for ruling out mood and anxiety disorders in adults in primary care settings. DATA SOURCES: Our rapid review searched MEDLINE, Embase and PsycInfo from January 1, 2006, to May 27, 2025. STUDY SELECTION: A single reviewer conducted screening, critical appraisal and data extraction. Low risk-of-bias studies were included. Sensitivity, specificity, and negative likelihood ratios (NLRs) with 95% confidence intervals were extracted or calculated. A threshold of NLR < 0.1 was used to interpret strong rule-out performance. SYNTHESIS: We included 11 low risk-of-bias studies evaluating validity in 13 tools. No reliability studies were included due to high risk-of-bias. The Patient Health Questionnaire (PHQ)-2 (≥ 1/7), PHQ-9 (≥ 10/17), Generalised Anxiety Disorder (GAD)-2 (≥ 2/6), and GAD-7 (≥ 5/21) demonstrated the strongest evidence for ruling out depression and anxiety (NLR < 0.1). CONCLUSIONS: The PHQ-2, PHQ-9, HADS-D, 15-item GDS, QIDS-SR16, GAD-2, and GAD-7 are brief, valid tools with strong rule-out performance for depression and anxiety in primary care. Future research should evaluate reliability and performance in diverse providers and patients, including non-physician settings and underserved communities.