Aims

The aims of this study were to identify whether carrying a shared care booklet improves mental health, service contact and patient satisfaction and to assess the pattern of use of patient-held records by patients and professionals.

Sample

Patients aged 16-65 years with long-term mental illness who were registered with a GP and would be receiving follow-up by at least one mental health professional and living in the hospital's catchment area were eligible for recruitment. Long-term mental illness was defined as diagnosis of psychosis, severe non-psychotic disorder, severe personality disorder or other illnesses requiring long-term supervision that resulted in the patient being unable to fulfil at least one of the following: holding down a job; self-care and personal hygiene; performing necessary domestic chores; participating in recreation activities (Reference Kendrick, Burns and FreelingKendrick et al, 1995). The disability must be due to one of the following: withdrawal or inactivity, responses to hallucinations, bizarre or embarrassing behaviour, or violence towards self or others.

Design of the shared care record

The record was designed to be small enough to be convenient, but large enough to take adequate information. The record was A6 size (similar to a European passport) and had three sections. Section 1 (front page) was for recording the patient's initials, date of birth and the names and addresses of GP, psychiatrist, social worker and keyworker. For reasons of confidentiality, the patient's full name and address were not recorded on the record. At the bottom was a return address if the card was found. Section 2 (middle pages) provided space for recording brief clinical notes and medication details (one entry per page). Section 3, on the back page, was for recording future appointments.

Outcome measures

The outcome measures chosen were the Behaviour and Symptom Identification Scale (BASIS-32; Reference Eisen, Dill and GrobEisen et al, 1994), the Brief Psychiatric Rating Scale (BPRS; Reference Overall and GorhamOverall & Gorham, 1962), rated 0-6, the Client Satisfaction Questionnaire (CSQ; Reference Larsen, Attkisson and HargreavesLarsen et al, 1979), hospital admissions and out-patient clinic attendance and default rates. The BASIS-32 is a self-report questionnaire that provides a comprehensive assessment of psychopathology. Thirty-two items are rated between ‘0’ for no problem to ‘4’ for severe problems.

Randomisation

For the purposes of this study, the unit of randomisation was the patient's general practice. Randomising the patient or individual GP could result in bias, given that the introduction of the patient-held records to some patients or doctors within a practice may result in a change in the culture of care, and this could have an impact on the controls.

A list of all the local general practices in the hospital's catchment area was assembled. Practices were numbered sequentially in alphabetical order according to the first line of the address. Practices were randomised to shared care or control status using a computer-generated algorithm.

Recruitment

We (Z.McC., S.T., J.W) recruited subjects near the time of their discharge (i.e. within a week of the anticipated discharge date as supplied by the ward). Posters were displayed prominently on the wards and the ward staff were reminded regularly about the study. Wards were visited at least weekly during the recruitment periods in order to identify potential subjects. We monitored discharges in order to identify patients who had been discharged without seeing a member of the study team. Attempts were made to see at home any individuals who may have met eligibility criteria but who were discharged before recruitment. If the potential subject met the eligibility criteria and gave written informed consent, the BASIS-32, BPRS and CSQ were completed prior to identifying randomisation status. Subjects in the shared care arm were given a shared care booklet and a written and verbal explanation of how to use it. Control subjects received usual care from the primary care and hospital teams. Apart from the provision of shared care, subjects in both arms were treated equally.

Promulgation to health professionals

All local GPs, hospital doctors, community nurses and social workers were informed about the shared care study before recruitment began. The study was also presented to GPs, hospital staff and social workers at local meetings. Once a subject had been recruited to the study, a letter was sent to the patient's consultant psychiatrist, GP and other health workers giving information about the recruitment. If the subject was in the intervention arm, further information about the use of the shared care booklet was provided. Brightly coloured stickers identifying the patient as being in the shared care study and prompting the health worker to request the record were attached to the patient's hospital notes and were sent to the GP and other health workers to attach to their records.

Follow-up

Subjects were assessed at 6 months and 1 year, usually by visiting them at home. These time periods were chosen in order to assess whether there was any attenuation in the impact of shared care over time.

Analysis

Statistical analysis

Categorical data were analysed by the χ² test or comparison of odds ratio (OR) or relative risk (RR) with confidence intervals (CI) where appropriate. Parametric data were analysed using Student's t-tests. Longitudinal data were analysed using analysis of covariance. Data were analysed on observed cases (i.e. subjects completing all assessments) and by intention-to-treat using last observation carried forward with all subjects completing the recruitment procedure incorporated into the final analysis. Practice-based analysis was also performed on the main outcome parameters. The intracluster correlation coefficient (ICC) was calculated for baseline values for those practices with more than one recruit using the formula:

\batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \[\ {\rho}_{\mathrm{int}}=\frac{{\sigma}_{between}^{2}}{{\sigma}_{between}^{2}+{\sigma}_{within}^{2}}\ \] \end{document}

were \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\rho}_{\mathrm{int}}\) \end{document} is the ICC, \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\sigma}_{between}^{2}\) \end{document} is the between-cluster variance and \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\sigma}_{within}^{2}\) \end{document} is the within-cluster variance (Reference Machin, Campbell and FayersMachin et al, 1997). This can be used to calculate the ‘inflation’ needed to correct sample size estimates. This is given by the equation:

\batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \[\ 1+(n_{\mathrm{p}}-1){\rho}_{\mathrm{int}}\ \] \end{document}

where n _p is the mean number of patients per practice.

Recruitment

Characteristics of the general practices are shown in Table 1. Of the 252 individuals considered for this study, 90 were recruited (Table 2). Flow through the study and the main reasons for non-recruitment are shown in Fig. 1. There were no significant differences in gender or diagnosis between study entrants and those excluded.

Fig. 1 Flow diagram of recruitment and attrition.

Table 1 Characteristics of randomised practices and those practices from which subjects were recruited

	Practices randomised (n=91)		Practices providing subjects (n=28)
	Number of practices	Number of partners	Number of partners per practice				Median (range) partners per practice	Number of practices providing 3 or more subjects
			1	2	3	4+
Shared care	46	111	1	5	3	7	5 (1-7)	9
Standard care	45	105	3	5	2	2	4 (1-7)	4

Table 2 Baseline socio-demographic and clinical characteristics of the sample

	Shared care (n=55)	Standard care (n=35)
Mean age in years (s.d.)	36 (12.5)	41 (12.6)
Male (%)	32 (56%)	16 (46%)
Living alone (%)	46 (84%)	29 (83%)
Not working (%)	47 (89%)	23 (70%)
White (%)	49 (89%)	27 (77%)
Diagnosis1
Schizophrenia (%)	23 (42%)	15 (43%)
Depression (%)	11 (20%)	9 (26%)
Bipolar disorder (%)	8 (15%)	3 (9%)
Personality disorder (%)	6 (10%)	3 (9%)
Other (%)	7 (13%)	5 (14%)
Baseline assessment
Admission in previous year (%)	20 (36%)	13 (37%)
Mean BASIS-32 (s.d.)	1.21 (0.88)	1.27 (0.86)
Mean BPRS (s.d.)	12.6 (7.0)	12.5 (6.3)
Mean CSQ (s.d.)	22.2 (4.8)	22.2 (4.9)

Comparison of shared care and standard care

There were no significant differences in results of patient-based and practice-based analyses. The results using patient-based data are presented in Table 3. There were no significant differences in BASIS-32, BPRS or CSQ scores between groups. The number of subjects admitted, in-patient days, number of subjects attending as out-patients and the number of out-patient clinic visits and defaults did not differ significantly between shared care and control groups.

Table 3 Comparing mean (s.d.) follow-up scores for the Behaviour and Symptom Identification Scale (BASIS-32), Brief Psychiatric Rating Scale (BPRS) and Client Satisfaction Questionnaire (CSQ) between groups using analysis of covariance, with randomisation status as fixed variable and relevant baseline result as covariate¹

	Shared care (n=55)	Standard care (n=35)	Significance test	P	Difference in means	95% CI for difference in means
Mean (s.d.) BASIS-32	1.27 (0.81)	1.20 (0.82)	t=0.73	0.38	0.06	-0.28 to 0.41
Mean (s.d.) BPRS	16.9 (9.8)	13.8 (8.6)	t=2.52	0.12	3.08	-0.94 to 7.1
Mean (s.d.) CSQ	22.3 (6.5)	23.4 (4.4)	t=0.79	0.37	-0.89	-3.38 to 1.59
Admissions
Number (%) subjects admitted	30 (55)	15 (43)	χ2=1.17	0.28
Median (range) admissions	0.65 (0-7)	0.52 (0-5)	z=0.95	0.34
Median (range) in-patient days	7 (0-235)	0.71 (0-96)	z=0.96	0.33
Out-patient visits
Number (%) attending clinic	38 (69)	25 (71)	χ2=0.06	0.81
Median (range) clinic visits	1.50 (0-17)	1.46 (0-7)	z=0.48	0.63
Median (range) clinic defaults	0.94 (0-6)	0.90 (0-6)	z=0.27	0.79

Factors that may predict admission during the study period were explored using logistic regression with the following covariates: age, gender, ethnicity, baseline BPRS scores, diagnosis (dichotomised to psychosis/non-psychosis), change of consultant and/or change of GP during the study, admission in the year prior to the study and allocation to shared care or standard care. Two covariates emerged as significant. Admission was more common in patients with psychotic illness (OR=5.2, 95% CI 1.9-14.1) and non-white patients (OR=4.1, 95% CI 1.2-14.2). Treatment allocation was not a significant predictor of subsequent admissions (OR=1.5, 95% CI 0.5-4.0).

Predictors of out-patient attendance and defaults were explored by logistic regression using the following covariates: age, gender, ethnicity, baseline BPRS scores, diagnosis (dichotomised to psychosis/non-psychosis), change of consultant, admission in the year prior to the study and allocation to shared care or standard care. Allocation to shared care did not predict out-patient attendance.

Use of shared care records

Shared care in psychiatry

A variety of shared care models have been suggested (Reference Hickman, Drummond and GrimshawHickman et al, 1994a ), including patient-held records, computer-based shared care, standardised record sheets sent between GPs and hospital, community clinics and liaison. In situations such as psychiatry, where many agencies are often involved in the care of patients, only the first two models are feasible for most patients. Potential advantages to patient-held records include more rapid dissemination of information between professionals, strengthening of the GPs' role and greater involvement of the patient in making decisions about care. However, there are several potential drawbacks, including confidentiality issues, relying on the patient to carry the records and duplication of information.

Methodological issues

A large number of potential subjects were excluded, although this does not necessarily undermine the validity of the trial. Many potential subjects were excluded because they failed to meet the chosen criterion of severe mental illness (Reference Kendrick, Burns and FreelingKendrick et al, 1995). Shared care programmes are likely to be of less salience to both patients with less chronic illness and their professional carers. Another principal reason for non-recruitment was that the potential subject or the GP came from outside the catchment area of the hospital. We wanted to test shared care records in an optimal setting with GPs and patients who had contact with the service.

Despite equal numbers of practices being allocated to each treatment arm, more patients were recruited to shared care than to standard care. There are a number of possible explanations for this disparity, one being that there were more GPs (n=111) in the practices allocated to the shared care limb than the standard limb (n=105), but this is unlikely to account for all the difference by itself. Another possible explanation is that several large practices close to the study centre were randomised to the shared care limb and a larger proportion of patients with chronic mental health problems may be registered with these practices because of their proximity to the hospital and the fact that they had general practice partners with an interest in mental health.

Effects of cluster randomisation

The size of the cluster effect suggests that this study may have been marginally under-powered. When cluster randomisation is used, there may be a difference in the variance between practices and the variance between patients within practices. The variance detected in this study was large (ICC=0.24 for the BASIS-32), suggesting that too few subjects were recruited. Nevertheless, there were no trends towards an effect of shared care, and a type II error, although possible, is not likely.

Use of shared care records

There was a low rate of usage of shared care records among patients and professionals alike, despite the scheme being widely advertised. Patients may have been reluctant to carry shared care records because they were concerned about confidentiality, found the records stigmatising or did not appreciate their potential usefulness. Lack of motivation and organisational abilities in patients with severe mental illness would be another factor to explain the low rate of usage. Professionals may have been reluctant to use the records because they represent a time-consuming duplication of information, they may have been uncertain about what to write in the records or feared questions or censure about the content. Some professionals may have lacked a feeling of ownership about the study, despite our efforts to involve them.

It is possible that shared care records do not improve patients' well-being no matter how diligently they are used. We cannot assume that better communication will have a positive impact on the outcome parameters measured. Shared care records may enhance communication between professionals but efficacy of communication per se is hard to measure, and all the outcomes chosen are at a level beyond communication and rely on the notion that better communication results in better health or satisfaction or service use.

It is difficult to be dogmatic about the utility of shared care records because of the methodological problems encountered during the study. However, patient-held records (even under the guise of smart cards) should not be introduced to this patient group, at least in the way attempted here, without further evaluation. For a scheme of this nature to work in the future it is likely that patients targeted for shared care will have to be selected carefully, probably excluding those most severely ill patients who may benefit most from shared care. Furthermore, any future shared care scheme should probably be introduced wholesale, with a dedicated coordinator, thus altering the culture of care throughout the service. Paradoxically this would reduce the opportunity to evaluate future schemes under controlled conditions.

CLINICAL IMPLICATIONS

• ▪ Patient-held shared care records do not appear to improve mental health or satisifaction with care delivery of patients with long-term mental illness.

• ▪ Professionals appeared reluctant to use shared care records.

• ▪ If such schemes are introduced, they should target patients without psychosis.

LIMITATIONS

• ▪ Introduction of shared care records alone does not alter the culture of care delivery.

• ▪ Possible inadequate power due to large intraclass correlation coefficient in this sample.

• ▪ Service changes during the study may have confounded results.