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        Nurse-led liaison psychiatry service for older adults: service evaluation
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        Nurse-led liaison psychiatry service for older adults: service evaluation
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Abstract

Aims and Method

To comprehensively describe a nurse-led consultation liaison service for older adults by retrospectively reviewing all referrals received in 2006 and comparing them against other services and benchmark reports.

Results

Of the 298 individuals referred to psychiatric services from other hospital wards, 120 were aged 85–94 years old (40%), 193 were male (65%) and 152 were referred from geriatrics (51%). A majority of 204 have not had previous contact with psychiatric services (69%). the most common diagnosis was dementia (33%, n=88), with 27% individuals (n=65) being referred onwards to secondary care.

Clinical Implications

This nurse-led service, using a novel approach of a support worker providing further community support, functions well compared with traditional consultation models. It helps identify many individuals with dementia and engages them into community psychiatric services.

The publication of Who Cares Wins by the Royal College of Psychiatrists (2005) has provided the best available benchmark for the service structure of liaison psychiatry for older adults. The development of specific liaison services is now a priority. Nurse-led consultation for older adult liaison services is gaining popularity. The biggest contribution of liaison nursing teams lies in planning effective discharge, continuity of care and education (Reference Mukaetova-LadinskaMukaetova-Ladinska, 2006). A randomised controlled trial showed it can be effectively implemented (Reference Baldwin, Goring and MarriotBaldwin et al, 2004). The efficacy is equivalent to doctor-led consultation models which may have cost-saving implications (Reference Baldwin, Goring and MarriotBaldwin et al, 2004).

Who Cares Wins states that the multidisciplinary approach has advantages over the consultation method in terms of a more specialist assessment, shortened length of stay, decreased mortality, more mental health reviews and increased compliance with the management plan (Royal College of Psychiatrists, 2005), which has been confirmed through other surveys (Reference Whelan, Burton and LawsonWhelan et al, 2007). Despite this, 73% of mental health services in the UK use the traditional sector-based consultation model (Reference Bentley, Cameron and HolmesBentley et al, 2003). This evaluation comprehensively reviews, over a 1-year period, all liaison referrals to old age psychiatry services. We are unaware of any studies which comprehensively describe a nurse-led old age liaison service detailing patient demographics and outcomes over a year.

Method

Setting and service

The study was carried out at Wrexham Maelor Hospital, part of the North East Wales National Health Service (NHS) Trust which serves approximately 330 000 people. The liaison service, using a consultation nurse model, has been operating there since 2000. The team was composed of a registered mental nurse band 6, working full time, who assessed all referrals, including those from accident and emergency, with additional input from a healthcare support worker. The nurse also received 1-hour weekly supervision from a consultant old age psychiatrist. If required, brief community support by the support worker was possible upon discharge. Referrals were made on standardised forms which included two non-mandatory instruments – the 6-item Cognitive Impairment Test (Reference Brooke and BullockBrooke & Bullock, 1999) and the 4-item Geriatric Depression Scale (Reference Shah, Phongsathorn and BielawskaShah et al, 1999). For individuals presenting with acute confusion, it was expected that the local acute hospital trust protocol for managing delirium had been first tried.

The individuals referred, already open to the community psychiatric team, were not assessed by the liaison service because of the limited capacity of the nurse and to improve continuity of care. Such individuals were seen by their own community psychiatric nurse and were excluded from this study. The previous service used the traditional doctor-led sector-based model, with referrals being assessed by the relevant staff grade doctor or consultant, with limited opportunity for follow-up or staff and family education because of time constraints. Since the introduction of the liaison service, it is the team's impression that referral rates have not increased, but detection rates have improved for dementia owing to their ability to spend longer assessing each individual. Staff and family satisfaction through improved communication and education have also improved. Patients and carers particularly appreciated the opportunity for brief community follow-up, with fewer requiring a community mental health team referral.

Evaluation

Each standardised referral form was scrutinised for the person's demographics, their type of accommodation, the specialty of the referrer, the reason for admission and the referrer's statement of the presenting problem. The length of stay in hospital prior to referral was also recorded, as was whether assessment tools were used and which psychotropic medications were prescribed on referral. The psychiatric diagnosis, the outcome for assessed individuals, the subsequent discharge accommodation and, if an assessment did not actually occur, why that was so, was obtained from the liaison assessment.

Diagnoses were established using the ICD–10 criteria (World Health Organization, 1992). The data were analysed using Simple Interactive Statistical Analysis (Reference UitenbroekUitenbroek, 1997); chi-squared tests were used to investigate the significant characteristics of particular groups, with the P-value for statistical significance set at 0.05. Odds ratios were calculated to measure effect size. The team chose groups of individuals for analysis and comparison based on whether it could make an important contribution, namely those with no previous or current psychiatric history, those referred into secondary care and those discharged into care.

Results

Wrexham Maelor Hospital has a 659-bed capacity. It received 24 812 acute admissions in 2006, of which 4906 were for surgery, 4663 for medicine, 2414 for orthopaedics and 2365 for geriatrics. The study identified 298 referrals (the total number for 2006) to psychiatry from the four units, all for people aged over 65 years. Seven of them died prior to being assessed and 13 more died prior to discharge; the mean length of stay prior to referral was 13.7 days. Most referrals were made by nursing staff rather than medical staff. In only 36% of referrals (n=107) had screening instruments been used. Athird (69%, n=204) had no previous or current contact with psychiatric services; 95% of those referred and accepted (n=283) were seen within the 3-day policy limit. Basic demographics including gender, age, accommodation type and referral source are described in Table 1 (the reason for admission, the referring problem, previous contact with psychiatric services and psychotropic medications listed on referral are also described).

Table 1. Basic demographics and referral information

Characteristic n (%)
Gender
    Men 193 (65)
Age, years
    65-74 63 (21)
    75-84 105 (35)
    85-94 120 (40)
    >95 10 (4)
Accommodation
    Independent 246 (83)
    Residential 29 (10)
    Nursing 13 (4)
    Sheltered 10 (3)
Referral source
    Geriatrics 152 (51)
    Medicine 89 (30)
    Orthopaedics 38 (13)
    Surgery 17 (6)
Reason for admission
    Emergency 102 (34)
    Confusion 48 (16)
    Fall 45 (15)
    Fracture 31 (10)
    Other 25 (9)
    Chronic illness relapse 21 (7)
    Elective procedure 14 (5)
    Self-harm 12 (4)
Referring problem
    Confusion 169 (57)
    Mood problem 70 (24)
    Self-harm 10 (3)
    Capacity assessment 13 (4)
    Anxiety 15 (5)
    Other 15 (5)
    Placement 6 (2)
Psychotropic medications on referral
    Total on medication 154 (52)
    Antipsychotic 81 (27)
    Benzodiazepine 39 (13)
    Antidepressant 26 (9)
    Cholinesterase inhibitor 4 (1)
    Other 4 (1)

The outcomes for assessed individuals, including reasons for non-assessment, psychiatric diagnosis, onward referrals and discharge placement, are presented in Table 2. The team's interventions included a one-off assessment in 62% individuals (n=184), with the rest requiring further reviews by the liaison nurse because of the complexity of presentation and risk. All those who received brief community liaison follow-up by the support worker (13%, n=33) also received weekly support during their in-patient stay, as decided by the team according to who needed further emotional support, including carers. The support worker also tended to use community support for those entering into a care home to provide a link between in-patient stay and primary care during the transition period.

Table 2. Outcomes for assessed patients

Outcome n (%)
Reason for non-assessment
    Open to secondary care 48 (47)
    Medically inappropriate 31 (30)
    Discharged before seen 16 (16)
    Died prior to assessment 7 (7)
Total not assessed 102 (34)
Psychiatric diagnosis (ICD—10)
    Dementia 88 (33)
    Delirium 52 (20)
    Mood 50 (19)
    None 27 (10)
    Alcohol dependence 19 (8)
    Neurosis 12 (4)
    Psychosis 7 (3)
    Other 6 (2)
    Personality 3 (1)
Outcomes for assessed patients
    Liaison only as an in-patient 115 (47)
    Secondary care referral 65 (27)
    Brief community liaison follow-up 33 (13)
    Psychiatrist consultation 20 (8)
    In-patient admission 7 (3)
    Alcohol services 5 (2)
Discharge placement
    Home 114 (60)
    Placement 38 (20)
    Community NHS hospital 26 (13)

For those who saw a staff grade or a consultant psychiatrist during their in-patient admission, this was mainly attributed to diagnostic difficulty, psychotropic medication review, review before admission to the psychiatry ward, challenging capacity assessments, and where the nurse was experiencing undue difficulty in the staff dynamic between psychiatry and the general hospital. At discharge from the team, 27% of individuals (n=65) were referred to secondary care, namely older person's mental health services such as a community mental health team, memory clinic, out-patient clinic and day hospital. (The significance of differences between selected variables is presented in Table 3.)

Table 3. Characteristics of the variables analysed

Characteristic χ2 P Odds ratio (CI)
No previous or current psychiatric history
    Received liaison follow-up 22.89 < 0.01 3.62 (2.14-6.13)
    Diagnosed with delirium 5.14 0.02 2.52 (1.17-5.42)
    Prescribed psychotropic medications on referral 7.80 < 0.01 0.48 (0.29-0.79)
Referred to secondary care
    Diagnosed with dementia 36.74 < 0.01 5.89 (3.26-10.65)
    Admitted from own home 5.01 0.03 4.07 (1.21-13.62)
    Received liaison follow-up 12.03 < 0.01 0.34 (0.19-0.62)
Discharged into care
    Received liaison follow-up 34.78 < 0.01 10.49 (4.31-25.50)
    Admitted with a fracture 4.47 0.03 2.62 (1.15-5.98)
    Diagnosed with delirium 8.10 < 0.01 2.54 (1.37-4.72)
    Admitted with falls 4.50 0.03 2.29 (1.13-4.67)
    Diagnosed with dementia 3.48 0.06 2.08 (1.03-4.21)
    Admitted from own home 7.79 < 0.01 0.34 (0.16-0.70)
    Male 9.59 < 0.01 0.28 (0.13-0.63)

Discussion

The service received a large number of referrals for its size, comparable to King's College Hospital, London (336 patients in 2001; Reference Hanlon, Mujic and PrinceHanlon et al, 2004); this has not changed over the past 5 years. Referrals were more frequent during winter, confirming previous research (Benbow et al, 1998), and may have implications for staffing. The majority of individuals lived independently prior to admission, challenging the stereotyped view of the incapacitated elderly person. There was a reluctance to use the non-mandatory assessment tools before referral and these tended to be used on people with behavioural disturbance or non-adherence.

Most individuals were referred from geriatrics, with little referrals from surgery and orthopaedics, in line with previous studies (Reference Bentley, Cameron and HolmesBentley et al, 2003). There are noticeable differences in the number of referrals of people aged over 65 years old in medicine (34%), surgery (42%), and elective (72%) and trauma (21%) orthopaedics, and also in numbers of admission per year per specialty with the referral rate per specialty. It is estimated that for one old age psychiatry referral, 16 admissions are made to geriatrics, 18 to medicine, 38 to orthopaedics and 121 to surgery (Reference Boddy, Jennett and StrangBoddy et al, 1977; Reference Burley, Currie and SmithBurley et al, 1979; Reference Asimakopoulous, Harrison and MagnussenAsimakopoulous et al, 1998; Reference Gomberg, Gruen and SmithGomberg et al, 1999).

‘Acute emergency’, confusion, falls and fractures constituted the most common reasons for acute admission. With 69% of those referred having no previous contact with psychiatric services, many elderly individuals present via such acute events. Liaison services have an important role in detecting mental illness and signposting thereafter, which compares well with published data (Reference Ashaye, Lambourne and LambourneAshaye et al, 2006). The most common referring problem was confusion. Other problems included a mood disorder, self-harm, capacity assessment, anxiety and assessment of placement, and compares similarly with other surveys (Reference RaoRao, 2001; Reference Ashaye, Lambourne and LambourneAshaye et al, 2006). The rate of self-harm (4%) was comparable with that in other services (Gash et al, 2005). Over half of those referred were already prescribed psychotropic medications which tended to be antidepressants. With only five referrals asking for a psychotropic medication review, medication management should become an area for potential service development.

This survey re-affirms the three D's of old age psychiatry – dementia, delirium and depression – and is comparable with Who Cares Wins, with prevalence of 31%, 20% and 29% respectively, and other surveys such as Whelan et al's (Reference Whelan, Burton and Lawson2007) with prevalence of 37%, 26% and 24% respectively. For rarer diagnoses (anxiety, psychosis and alcohol dependence) the prevalence was within the ranges in Who Cares Wins, except for alcohol dependence (it was diagnosed in 8% of individuals which may be caused by local patterns of use – Who Cares Wins and other surveys (Reference Whelan, Burton and LawsonWhelan et al, 2007) state a range of 1–5%).

Of those referred to a community mental health team, day hospital, memory clinic or out-patient clinic, individuals tended to come from their own home, be diagnosed with dementia and be less likely to receive liaison support worker follow-up owing to their more complex needs requiring a community psychiatric nurse support. For those who returned home without a secondary care referral, brief community liaison support has been used frequently to bridge the gap between in-patient stay and primary care, and to provide post-delirium counselling. Individuals discharged into care were mostly those presenting with acute events such a fracture, fall and delirium. They received brief liaison follow-up only, considering the enhanced support in the care home environment.

The results of our survey are limited by the subjective nature of diagnosis, omitted information on the assessment forms and those patients with psychiatric morbidity not referred. Based on the data collected, the nurse-led consultation service model functions well in comparison with others which mainly use the traditional medically-led consultation model. The service uses a novel approach for post-discharge community support with a healthcare support worker. Being nurse-led, with targeted medical support as needed, the service may be cost-saving. It identifies many individuals with dementia that had no previous contact with psychiatry, and engages them into community services. As referrals from orthopaedics and surgery are improved, it is likely that even more people with dementia would be identified earlier.

Declaration of interest

None.

Acknowledgements

We thank the North East Wales NHS Trust and Dr M. Krishna for his statistical and editorial support.

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