Psychology Today: Insomnia rates have continued to rise throughout the pandemic, contributing to increasing rates of depression and anxiety, as well as worsening symptoms of other severe mental illnesses.
The incidence of psychiatric illness in patients with insomnia is estimated to be near 50 percent. The highest comorbidity rates have been noted in mood disorders, including depression and bipolar disorder, as well as anxiety disorders. In patients with diagnosed major depressive disorder, as many as 90 percent struggle with insomnia.
Insomnia has also been identified as a risk factor for the development of a mental illness. In a meta-analysis of patients with insomnia published in 2011, the authors concluded that persistent insomnia can more than double the risk of major depression.
Another 2019 meta-analysis of more than 130,000 participants assessed the effects of baseline insomnia on the development of a psychiatric illness over a five-year period. Individuals with insomnia demonstrated a significantly higher risk of alcohol abuse and psychosis. Additionally, insomnia tripled the likelihood of being diagnosed with a depressive or anxiety disorder.