Mental illness is associated with increased risk of suicidal ideation among cancer surgical patients

Background Mental illness and depression can be associated with increased risk of suicidal ideation (SI). We sought to determine the association between mental illness and SI among cancer surgical patients. Methods Medicare beneficiaries who underwent resection of lung, esophageal, pancreatic, colon, or rectal cancer were analyzed. Patients were categorized as no mental illness, anxiety and/or depression disorders or bipolar/schizophrenic disorders. Results Among 211,092 Medicare beneficiaries who underwent surgery for cancer, the rate of suicidal ideation was 270/100,000 patients. Antecedent mental health diagnosis resulted in a marked increased SI. On multivariable analysis, patients with anxiety alone (OR 1.49, 95%CI 1.04–2.14), depression alone (OR 2.60, 95%CI 1.92–3.38), anxiety + depression (OR 4.50, 95%CI 3.48–5.86), and bipolar/schizophrenia (OR 7.30, 95%CI 5.27–10.30) had increased odds of SI. Conclusions Roughly 1 in 370 Medicare beneficiaries with cancer who underwent a wide range of surgical procedures had SI. An antecedent mental health diagnosis was a strong risk factor for SI.