The study’s main aim was to assess the end-of-life decision-making capacity and health-related values of older people with serious mental illness.

This was a cross-sectional, observational study, done at Weskoppies Psychiatric Hospital, Gauteng Province, South Africa that included 100 adults older than 60 years of age and diagnosed with serious mental illness.

Socio-demographic, diagnostic, and treatment data were collected before administration of the Mini- Cog and a semi-structured clinical assessment of end-of-life decision-making capacity. Finally, the standardized interview, Assessment of Capacity to Consent to Treatment, was administered. This standardised instrument uses a hypothetical vignette to assess decision-making capacity and explores healthcare-related values.

According to the semi-structured decision-making capacity assessment, 65% of participants had decision-making capacity for end-of-life decisions. The Assessment of Capacity to Consent to Treatment scores were significant (p<0.001) when compared to decision-making capacity. Significant correlations with impaired decision-making capacity included: lower scores on the Mini-Cog (p<0.001); a duration of serious mental illness of 30-39 years (p=0025); having a diagnosis of schizophrenia spectrum disorders (p=0.0007); and being admitted involuntarily (p<0.0001).

Two thirds of older people with serious mental illness had decision-making capacity and were able to engage in end-of-life care discussions. Healthcare providers have a duty to initiate advance care discussions, optimize decision-making capacity, and protect autonomous decision-making. Chronological age or diagnostic categories should never be used as reasons for discrimination, and older people with serious mental illness should receive end-of-life care in keeping with their preferences and values.