High rates of psychiatric comorbidity among requesters of medical assistance in dying: Results of a Canadian prevalence study

Introduction Medical assistance in dying (MAID) was legalized in Canada in 2016. We aimed to characterize the prevalence of psychiatric comorbidity among MAID requesters in order to enhance clinicians' awareness of the potential for psychiatric needs among MAID requesters. Methods Using chart review, we retrospectively abstracted demographic, clinical, and psychosocial variables of MAID requesters at our institution, a 638-bed tertiary care center in Toronto, Canada. Patients requesting MAID between June 2016 and April 2019 were included. Psychiatric comorbidity was the primary dependent variable. Results 155 patients requested MAID during the study period. Among them, 60 (39%) had documented psychiatric comorbidity, most commonly depression (n=44; 73%). Severe mental illness accounted for 10 cases (6.5% of the total sample). Among patients with psychiatric comorbidity, 25 (41.7%) had at least one MAID eligibility assessment conducted by a psychiatrist, compared to 16 (16.8%) patients without psychiatric comorbidity (χ2=11.649, df=1, p=0.001). Among the 10 patients with severe mental illness (SMI), a psychiatrist conducted a MAID eligibility assessment in 8 patients (80%), compared to 17 patients (34%) without SMI (χ2=7.255, df=1, p=0.007). Conclusion Patients with psychiatric comorbidity comprise a substantial proportion of patients requesting MAID. These findings highlight the importance of recognizing the psychiatric needs of MAID requesters and involving psychiatry in MAID assessments when warranted. A gap still exists in understanding which factors are most important in determining the need for psychiatric involvement in MAID assessments. We propose recommendations borne from our clinical experience.