A recent meta-analysis conducted by researchers at McMaster University raises concerns about the reliability of standardized diagnostic interviews (SDIs) in mental health assessments. Analyzing 57 studies involving over 8,000 adults across 26 countries, the findings indicate that SDIs often yield inconsistent results, particularly for subjective mental health disorders such as anxiety and depression. For instance, retests for non-affective psychoses showed only a 55% consistency rate, while substance use disorders had a higher reliability of 72%. The study's senior author, Laura Duncan, emphasized the need for caution in using SDIs as a 'gold standard' for diagnosis, suggesting that they should be complemented with contextual information to enhance accuracy. Despite acknowledging limitations in their review, the researchers concluded that many patients could receive differing diagnoses upon retesting, highlighting the complexities of mental health conditions.