Suicidal Ideation Among Patients with Gastrointestinal Cancer

Abstract

Background: Mental illness (MI) and suicidal ideation (SI) often are associated with a diagnosis of cancer. We sought to define the incidence of MI and SI among patients with gastrointestinal cancers, as well as ascertain the predictive factors associated with SI.

Methods: Patients diagnosed between 2004 and 2016 with stomach, liver, pancreatic, and colorectal cancer were identified from the SEER-Medicare database. County-level social vulnerability index (SVI) was extracted from the Centers for Disease Control database. Multivariable logistic regression was used to identify factors associated with SI.

Results: Among 382,266 patients, 83,514 (21.9%) individuals had a diagnosis of MI. Only 1410 (0.4%) individuals experienced SI, and 359 (0.1%) committed suicide. Interestingly, SI was least likely among patients with pancreatic cancer (ref: hepatic cancer; odds ratio [OR] 0.67, 95% confidence interval [CI] 0.52-0.86; p = 0.002), as well as individuals with stage III/IV disease (OR 0.59, 95% CI 0.52-067; p < 0.001). In contrast, male (OR 1.34, 95% CI 1.19-1.50), White (OR 1.34, CI 1.13-1.59), and single (OR 2.03, 95% CI 1.81-2.28) patients were at higher odds of SI risk (all p < 0.001). Furthermore, individuals living in relative privilege (low SVI) had markedly higher risk of SI (OR 1.33, 95% CI 1.14-1.54; p < 0.001). Moreover, living in a county with a shortage of mental health professionals was associated with increased odds of developing SI (OR 1.21, 95% CI 1.04-1.40; p = 0.012).

Conclusions: Oncology care teams should incorporate routine mental health and SI screening in the treatment of patients with gastrointestinal cancers, as well as target suicide prevention towards patients at highest risk.