Capacity to consent to treatment in psychiatry inpatients - a systematic review.

BACKGROUND: Mental capacity for treatment decisions in psychiatry inpatients is an important ethical and legal concern, especially in light of changes in mental capacity legislation in many jurisdictions. AIMS: To conduct a systematic review of literature examining the prevalence of mental capacity for treatment decisions among voluntary and involuntary psychiatry inpatients, and to assess any correlations between research tools used to measure mental capacity and binary judgements using criteria such as those in capacity legislation. METHOD: We searched PsycINFO, Ovid MEDLINE and EMBASE for studies assessing mental capacity for treatment decisions in people admitted voluntarily and involuntarily to psychiatric hospitals. RESULTS: Forty-five papers emanating from 33 studies were identified. There was huge variability in study methods and often selective populations, but the prevalence of decision-making capacity varied between 5% and 83.7%. These figures resulted from studies using cut-off scores or categorical criteria only. The prevalence of decision-making capacity among involuntary patients ranged from 7.7% to 42%, and among voluntary patients ranged from 29% to 97.9%. Two papers showed positive correlations between clinicians' judgement of decision-making capacity and scores on the MacArthur Competence Assessment Tool for Treatment; two papers showed no such correlation. CONCLUSIONS: Not all voluntary psychiatry inpatients possess mental capacity and many involuntary patients do. This paradox needs to be clarified and resolved in mental health legislation; supported decision-making can help with this task.Key PointsLegislative changes for mental capacity are taking place in many jurisdictions.This is an important human rights issue for many people, including psychiatry inpatients.In our review, we found the prevalence of decision-making capacity varies between 5% and 83.7% in psychiatry inpatients.Not all voluntary inpatients have decision-making capacity.Many involuntary inpatients have mental capacity to make decisions.Supported decision-making can help those with impairments in their mental capacity.

Police Involvement in Involuntary Psychiatry Admission: A Report From the Dublin Involuntary Admission Study.

OBJECTIVE: The authors sought to compare diagnostic and demographic factors among patients who were involuntarily admitted to psychiatry care with or without police involvement. METHODS: All admissions to psychiatry units in two university hospitals in Ireland were studied over a 3.5-year period. RESULTS: Of 2,715 admissions, 443 (16%) were involuntary; complete data were available for 390 of these involuntary admissions, of which 78 (20%) involved police. Patients with police involvement did not differ significantly from those without police involvement in gender, marital and employment status, or diagnosis. The former patients had a longer mean admission duration and were more likely to be admitted under the "risk criterion" of the Mental Health Act 2001. Multivariable testing indicated that these variables do not independently predict police involvement. CONCLUSIONS: The diagnostic or demographic factors examined did not contribute to police involvement in involuntary admission. Features such as homelessness, social exclusion, or criminogenic factors might underlie police involvement.

Age, psychiatry admission status and linear mental capacity for treatment decisions.

The relationship between age and mental capacity among psychiatry inpatients is not fully understood. We aimed to assess mental capacity for treatment decisions in voluntary and involuntary psychiatry inpatients in Ireland and, in this analysis of our data-set, to elucidate the linear relationship, if any, between linear (as opposed to categorical) mental capacity and age. We used the MacArthur Competence Assessment Tool for Treatment (MacCAT-T) to assess mental capacity for treatment decisions in 215 psychiatry inpatients (176 voluntary and 39 involuntary) in four psychiatry admission units in Ireland. Mean age was 46.2 years and majorities were male (58.1%), never married (74.0%), unemployed (64.2%) and of Irish ethnicity (87.0%). The most common primary diagnoses were schizophrenia and related disorders (42.8%) followed by affective disorders (36.7%). On multi-variable linear regression analysis, linear mental capacity was significantly associated with voluntary admission status, being employed, having a primary diagnosis other than schizophrenia or a related disorder, and younger age. Together, these factors accounted for 44.4% of the variance in mental capacity between participants. Overall, while increased age is associated with diminished mental capacity, other factors appear more significant, including involuntary admission status which is likely an indicator of symptom severity. There is a need for further research to (a) elucidate the relationships between the significant factors identified in this study and the cognitive status of patients (which impacts on assessments of mental capacity); (b) identify and elucidate other factors of likely relevance to mental capacity (e.g. medical illness, medication use); and (c) translate these findings into targeted interventions to support decision-making in clinical practice among psychiatry inpatients, especially those with involuntary status.

Convergence or Divergence? Comparing Mental Capacity Assessments Based on Legal and Clinical Criteria in Medical and Surgical Inpatients.

Despite the high prevalence of mental incapacity for treatment decisions in hospitals (27.7%), there is little information about the relationship, if any, between mental capacity assessments based on clinical and legal criteria. We performed a cross-sectional study of mental incapacity for treatment decisions in 300 hospital inpatients in two hospitals in Ireland, using the MacArthur Competence Assessment Tool for Treatment (MacCAT-T) and the legal definition of mental incapacity in Ireland's incoming Assisted Decision-Making (Capacity) Act 2015. We found that patients who lacked mental capacity according to the legal criteria scored significantly lower on all four subscales of the MacCAT-T (Understanding, Appreciation, Reasoning, and Communication) compared to those who had mental capacity according to the legal criteria. In light of the similarity between Ireland's legal definition of mental incapacity and legislative definitions in other jurisdictions (e.g. England and Wales), we conclude that legal assessments of mental incapacity in these countries accord closely with clinical assessments (as reflected in the MacCAT-T). Ireland's new mental capacity legislation should be implemented promptly in order to further operationalize Ireland's new legal definition of mental incapacity and provide patients with the supports they need to optimize their mental capacity for treatment decisions in hospitals.

Categorical mental capacity for treatment decisions among psychiatry inpatients in Ireland.

This study aimed to assess mental capacity for treatment decisions among psychiatry inpatients in Ireland and explore the relationship, if any, between mental capacity and various demographics and clinical variables. We assessed mental capacity for treatment decisions in 215 psychiatry inpatients in four psychiatry admission units. Almost half of the participants were female and the most common diagnoses were schizophrenia or a related disorder and affective disorders. Overall, 1.9% of participants lacked mental capacity for treatment decisions; 50.7% had partial mental capacity; and 47.4% had full mental capacity. These proportions did not differ between female and male patients. On multi-variable regression analysis, greater mental capacity was significantly associated with, in order of strength of association, voluntary admission status, Irish ethnicity, being employed and younger age. However, while these relationships were statistically significant (i.e. were unlikely to have occurred by chance), together they accounted for just 27.6% of the variance in mental capacity between participants (i.e. they were not very strong). The relatively high rate of "partial mental capacity" identified in our work suggests that decision-making supports are likely to be of substantial importance in assisting psychiatry inpatients making decisions about treatment, especially involuntary inpatients whose mental capacity is especially likely to be impaired. Future research could usefully clarify and quantify the role of cognitive and other factors in relation to the unexplained variance (72.4%) in mental capacity identified in this study; and explore which models of supported decision-making are most likely to assist the substantial proportion (50.7%) of psychiatry inpatients who have partial mental capacity for treatment decisions, as well as the minority lacking such mental capacity (1.9%).

Concordance of mental capacity assessments based on legal and clinical criteria: A cross-sectional study of psychiatry inpatients.

This study aimed to compare assessments of mental capacity based on legal criteria with assessments based on clinical criteria among psychiatry inpatients to establish the concordance, if any, between these two approaches to assessing mental capacity. We assessed mental capacity for treatment decisions in 215 psychiatry inpatients (176 voluntary and 39 involuntary) in four psychiatry admission units in Ireland using both legal criteria (Ireland's Assisted Decision-Making (Capacity) Act 2015) and clinical criteria (the MacArthur Competence Assessment Tool for Treatment; MacCAT-T). Over one third of participants (34.9%) lacked mental capacity for treatment decisions according to the legal criteria. Mental incapacity was associated with involuntary admission status, being unemployed, a primary diagnosis of schizophrenia or a related disorder, and older age. Patients who lacked mental capacity according to the legislation scored significantly lower on all subscales of the MacCAT-T than patients who had mental capacity. We conclude that mental capacity assessments based on legal criteria correlate closely with those based on clinical criteria. These findings support current legal definitions of mental incapacity in Ireland and other jurisdictions with similar legislation (e.g. England and Wales).

Does Involuntary Admission With Bipolar Disorder Differ From Involuntary Admission With Schizophrenia and Related Disorders? A Report From the Dublin Involuntary Admission Study (DIAS).

BACKGROUND: While involuntary psychiatric admission and treatment are common, little is known about what impact different diagnoses have on specific features of involuntary admission and on how involuntary status is terminated (eg, by psychiatrists or tribunals, which are independent, court-like bodies reviewing involuntary admissions). METHODS: We studied 2940 admissions, 423 (14.4%) of which were involuntary, at 3 psychiatry units covering a population of 552,019 individuals in Dublin, Ireland. RESULTS: Involuntary patients were more likely than voluntary patients to be male and unmarried. The median length of stay for involuntary patients was 27 days compared with 10 days for voluntary patients (P<0.001). Schizophrenia (and related disorders, including schizoaffective disorder) and bipolar disorder accounted for 58.6% and 17.3% of involuntary admissions, respectively, compared with 20.1% and 12.4% of voluntary admissions (P<0.001). Psychiatrists revoked the majority of involuntary orders for both patients with bipolar disorder (85.3%) and those with schizophrenia (and related disorders) (86.6%); in contrast, tribunals did not revoke any involuntary admission orders for patients with bipolar disorder and revoked orders for 3.8% of patients with schizophrenia (and related disorders) (P=0.034). On the basis of multivariable testing, increased age among patients with bipolar disorder was the only characteristic among those studied (sex, age, marital status, occupation, involuntary admission criteria, length of stay, method of involuntary order revocation, location) that independently distinguished involuntary patients with bipolar disorder from those with schizophrenia (and related disorders) (P=0.028). CONCLUSIONS: Involuntary admission of patients with bipolar disorder is similar in most respects to that of patients with schizophrenia (and related disorders). Consequently, it is important that measures aimed at reducing the need for involuntary admission (eg, patient advance statements/advance directives) are implemented equally across all diagnostic groups associated with involuntary care.

Variations in involuntary admission rates at three psychiatry centres in the Dublin Involuntary Admission Study (DIAS): Can the differences be explained?

Involuntary psychiatric admission is an established practice for patients who are acutely or severely mentally ill but the factors contributing to involuntary (as opposed to voluntary) admission are not fully clear. Nor is it clear why rates of involuntary admission often vary between hospitals within the same jurisdiction. We studied all admissions, voluntary and involuntary, in three inpatient psychiatry units in Dublin, Ireland, which cover a population of 552,019 people, over a one-year period (1 July 2014 until 30 June 2015, inclusive), as part of the Dublin Involuntary Admission Study (DIAS). During the study period, there was a total of 1136 admissions to these three units, of which 17% were involuntary for all or part of their admission. The overall admission rate (205.8 admissions per 100,000 population per year) was lower than the national rate (387.9) but this varied substantially across the three units studied. On multi-variable analysis, involuntary admission status was associated with male gender, being unmarried, and a diagnosis of schizophrenia, and was not significantly associated with age, occupation or which inpatient unit the person was admitted to. We conclude that variations in involuntary admission rates between different psychiatry admission units in Dublin are significantly explained by patient-level variables (such as gender, marital status and diagnosis) rather than centre-level variables, but that much of the variation in admission status between patients remains unexplained. Future, multi-level research could usefully focus on other patient-level factors of possible relevance (e.g. symptom severity), centre-level factors (e.g. local mental health service resourcing) and community-level factors (e.g. socio-economic circumstances in different areas) in order to further elucidate unexplained variance in admission status between patients.

Which involuntary admissions are revoked by mental health tribunals? A report from the Dublin Involuntary Admission Study (DIAS).

Little is known about which involuntary psychiatry patients are likely to have their involuntary admission orders revoked by mental health tribunals or review boards and which are not. We studied 2940 admissions, of which 423 (14.4%) were involuntary, at three adult psychiatry units covering a population of 552,019 people in Dublin. A majority of involuntary admission orders were revoked by psychiatrists (94.6%) rather than tribunals (3.0%). Revocation by tribunal was associated with older age and a diagnosis of schizophrenia. More detailed information about the conduct and outcome of tribunals is needed to better protect the rights of the mentally ill.

Exploring and explaining involuntary care: The relationship between psychiatric admission status, gender and other demographic and clinical variables.

Involuntary admission and treatment are features of psychiatric care in many countries, but the relationship between involuntary status and gender (among other factors) is not clear. We examined demographic and diagnostic factors associated with involuntary admission in a general adult psychiatry service in a deprived area of Dublin's north inner-city over a 7-year period (2008 to 2014 inclusive). Over this period, there were 1099 admissions, yielding an annual admission rate of 504.8 admissions per 100,000 population per year. When adjusted for deprivation, this rate (387.7) was lower than the national rate (413.9). Consistent with other inner-city areas in Dublin, 14.1% of admissions were involuntary, yielding an involuntary admission rate of 71.2 per 100,000 population per year (deprivation-adjusted rate: 54.8), which is higher than the national rate (39.4). After controlling for age, occupation, marital status and diagnosis, the only independent predictors of admission status were place of origin (p<0.001) and male gender (p=0.001). These findings are consistent with studies showing associations between male gender and involuntary status in the United States, New Zealand, Netherlands, Norway, Belgium, France, and Luxembourg. In contrast, female gender is associated with involuntary status in Switzerland, Brazil, and China. These cross-national differences are likely related to differing legal traditions and different criteria for involuntary admission, possibly related to varying emphases placed on "dangerousness" as a mandatory criterion for involuntary hospitalization. This merits further, cross-national study.