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[Spanish validation of the MacArthur Competence Assessment Tool for Treatment interview to assess patients competence
Ignacio Alvarez Marrodán1, Beatriz Baón Pérez2, Mercedes Navío Acosta3
1Servicio de Psiquiatría, Hospital de Día Irubide, Servicio Navarro de Salud, Pamplona, Navarra, España.
Background And Objective:
To validate the MacArthur Competence Assessment Tool for Treatment (MacCAT-T) Spanish version, which assesses the mental capacity of patients to consent treatment, by examining 4 areas (Understanding, Appreciation, Reasoning and Expressing a choice).
Sample:
160 subjects (80 Internal Medicine inpatients, 40 Psychiatric inpatients and 40 healthy controls).
Instruments:
MacCAT-T, Mini-Mental Status Examination (MMSE).
Procedure:
Feasibility study, reliability and validity calculations (against to gold standard of clinical expert).
Results:
Mean duration of the MacCAT-T interview was 18min. Inter-rater reliability: Intraclass correlation coefficient for Understanding=0.98, Appreciation=0.97, Reasoning=0.98, Expressing a choice=0.91. Internal consistency (Cronbach's alpha): Understanding=0.87, for Appreciation=0.76, for Reasoning=0.86. Patients considered to be incapable (gold standard) scored lower in all the MacCAT-T areas. Poor performance on the MacCAT-T was related to cognitive impairment assessed by MMSE.
Conclusions:
Spanish version of the MacCAT-T is feasible, reliable, and valid for assessing the capacity of patients to consent treatment.
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