Abstract
The prevalence of mental incapacity for treatment decisions among medical and surgical hospital inpatients is poorly understood or not known in many countries, including Ireland. To assess the prevalence of mental incapacity in hospital inpatients in Ireland. Cross-sectional observational study of mental incapacity for treatment decisions. We assessed mental capacity in 300 randomly selected hospital inpatients in 2 general hospitals in Dublin (urban) and Portlaoise (rural), in Ireland, using the MacArthur Competence Assessment Tool for Treatment (MacCAT-T). Mean MacCAT-T score was 14.80 (SD: 8.40) out of a possible maximum of 20 (with a higher score indicating greater mental capacity). Over one quarter of participants (27.7%; n = 83) lacked the mental capacity for treatment decisions; 1.7% (n = 5) had partial capacity and 70.7% (n = 212) had full capacity. Scores for each of the four sub-scales of the MacCAT-T were generally consistent across the four key areas of understanding, appreciation, reasoning and expressing a choice. Mental incapacity for treatment decisions is common in medical and surgical hospital inpatients in Ireland. This issue both merits and requires greater attention in clinical practice, research and legislation.
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