Depression, Anxiety, and Other Mental Disorders in Patients With Cancer in Low- and Lower-Middle-Income Countries: A Systematic Review and Meta-Analysis.

The prevalence of depression and anxiety in patients with cancer generally appears higher in LLMICs than in upper-income countries. Our findings demonstrate the existence of a significant and underappreciated disease burden. We suggest that clinicians remain vigilant to psychiatric symptoms. Improved screening and treatment are likely to improve quality of life and reduce both morbidity and mortality.