Economic cost of mental health services

Mental health problems are the largest single cause of illness in the UK, accounting for 23% of the total burden of disease, and in people of working age are the health conditions with the most impact. ⁵ Mental illness has been found to be more debilitating than most physical illnesses, for example, depression causes more disability than angina, arthritis, asthma or diabetes. ^{Reference Moussavi, Chatterji, Verdes, Tandon, Patel and Ustun6} Nevertheless, only 11.1% of the National Health Service (NHS) budget (£11.9 billion) is spent on treating mental health problems, ⁷ while receiving only 5% of the total for health research. ^{Reference Connor, Mortimer and Tomson3} This is worsened by the rising costs of mental health services – antidepressants have seen the largest increase in both net ingredient cost (£49.8 million or 22.6%) and the number of items dispensed (£3.9 million or 9.1%) of any section in the British National Formulary between 2010 and 2011. ⁸

The economic and social costs of mental ill health in England are estimated at around £105 billion per annum, including £21.3 billion in health and social care costs. It is estimated that these costs could double over the next 20 years. ^{Reference McCrone, Dhanasiri, Patel, Knapp and Lawton-Smith2} Prevention is key to addressing these spiralling costs.

A leaner mental health service is also needed to ensure high-quality care with lower costs. A lean mental health service will provide the right things to the right place at the right time in the right quantities, by evidence-based decision-making, while minimising waste, reducing delays and being flexible and open to change. ⁹ Simplified care delivery with reduced use of low-value activities (poor health outcomes with high costs) will result in significant savings. Design of care pathways should include high-value activities ^{Reference Owens, Qaseem, Chou and Shekelle10} that take advantage of synergies in treating comorbid physical and mental health conditions together.

Environmental cost of mental health services

Environmental costs are included in sustainable (triple bottom line) approaches because environmental change has been globally recognised as the greatest single threat to human health in the 21st century ^{Reference Costello, Abbas, Allen, Ball, Bell and Bellamy11} and is principally caused by human activity. The UK government has responded by introducing regulations for large organisations, including the NHS, with the aim of reducing environmental impacts.

The carbon footprint for NHS England in 2007 was 21 million tonnes of CO₂ equivalent (CO₂e). ¹² Mental health services account for 1.47 million tonnes of CO₂e ¹³ and are out-performing other services when it comes to carbon footprint per pound spent or per disability-adjusted life-year (DALY) saved. ^{Reference Appleby and Gregory14} This may be due to the nature of mental health service provision relying less on resource-heavy interventions such as dialysis in kidney care, with more emphasis on service-based interventions such as psychotherapy.

The NHS has demonstrated good leadership in reducing the carbon footprint through the Good Corporate Citizenship model and the sustainable development strategy. ^15,16 These aim to meet government targets of a 10% reduction of the 2007 NHS carbon footprint by 2015 and the Climate Change Act 2008 target of a 34% reduction in emissions by 2020. The government has also backed the Carbon Reduction Commitment Scheme, an emissions trading scheme for the UK that covers public sector organisations, making it a legal requirement for large trusts to reduce their emissions or face penalties. ¹⁷ The challenge has therefore been set and the onus is on the NHS to respond.

Meeting these carbon reduction targets will require a transformation in the way mental health services are designed, delivered and evaluated, as the main source of the carbon footprint of a health service is not its buildings or energy use but factors relating to clinical practice. ¹⁸ Although there is good reason for mental health services to reduce the carbon footprint of their estates as this releases cash rapidly, energy usage only accounts for 22% of the carbon footprint of the NHS. ¹⁸ Procurement (the purchase of medication and medical equipment) accounts for the majority of the carbon footprint (60%) of the NHS, ¹⁸ so NHS trusts need to ensure that medications and equipment are sourced sustainably. Crucially though, clinicians need to improve the sustainability of their individual practice. This requires a re-assessment of current services and interventions using the four principles of sustainable healthcare noted earlier.

Social cost of mental health services

Poor mental health has a large impact on the lives of individuals, their families, friends, carers and communities. Most mental health problems start early in life, with half of those affected experiencing symptoms by the age of 14, ^{Reference Kessler, Berglund, Demler, Jin, Merikangas and Walters19} and three-quarters by their mid-20s. ^{Reference Kessler and Wang20} Economic evaluations of mental illness during childhood and adolescence show costs to society ranging from £11 030 to £59 130 annually per child. ²¹

People with mental illnesses often have lower educational attainment, ^{Reference Cornaglia, Crivellaro and McNally22} find it harder to obtain and stay in work, ^{Reference Meltzer, Bebbington, Brugha, Jenkins, McManus and Stansfeld23} are more likely to be homeless, ^{Reference Rees24} have lower incomes, ^{Reference McManus, Meltzer, Brugha, Bebbington and Jenkins25} and are more likely to live in areas of high social deprivation. ^{Reference Murali and Oyebode26} They are more likely to have poor physical health, with high rates of smoking, alcohol and substance misuse ^{Reference Osborn27} and, on average, die 25 years earlier than the general population if they have a serious mental illness. ^{Reference Parks, Svendsen, Singer and Foti28}

Social costs include costs to Social Services, costs of informal care, costs of unemployment, sickness absence costs, costs to criminal justice and probation services. Sickness absence due to mental ill health costs £8.4 billion per year. Replacing staff who leave their posts because of mental illness costs employers £2.4 billion a year ²⁹ and 43% of those on long-term benefits due to health issues have a primary mental health problem. ³⁰

Given these large costs, it is essential that we move towards incorporating measures of social sustainability. When designing, delivering and evaluating interventions, factors such as employment and appropriate housing should be taken into account, alongside symptomatic changes. These factors could demonstrate benefit in terms that are more ‘health’ focused than ‘illness’ focused. Addressing the social impact of mental health services is critical as poor mental health has an impact on society and elements of society can contribute to poor mental health. Restoring social capital should be seen as a core responsibility of mental health services. Realising the full benefits of treating mental illness includes the restoration of a person's social life and integration with their community.

Benefits and synergies of sustainable psychiatry

The importance of interaction with the natural environment for achieving good mental health has been well recognised. ^{Reference Townsend and Weerasuriya31} Moving to a better quality physical environment can lead to improvements in psychological well-being, social relationships, performance in school, ^{Reference Wilner, Wackley, Pinkerton and Tayback32} and a reduction in anxiety and depression. ^{Reference Elton and Packer33} Greener lifestyles such as walking, cycling and access to green spaces are beneficial to physical health. They also improve mental health by reducing depression, reducing admissions and reducing symptoms in young people with attention-deficit hyperactivity disorder (ADHD). ^{Reference Wheater, Potts, Shaw, Perkins, Smith and Casstles34–37} The UK Faculty of Public Health states that ‘Safe, green spaces may be as effective as prescription drugs in treating some forms of mental illness, without the ”costs” of side-effects and ever rising numbers of prescriptions’. ³⁷ Direct contact with nature leads to a greater sense of connectedness to the community. ^{Reference Sullivan and Kuo38} Spending time in natural areas has been associated with speedier recovery from illness, ^{Reference Verderber and Reuman39} stress reduction, alleviation of anxiety symptoms and reduction of psychotic symptoms. ^{Reference Ulrich40–Reference Roe42} Children exposed to green settings feel more relaxed, less stressed, more positive and able to cope, and have improved cognitive functioning and social connectedness. ^{Reference Whitehouse, Varni, Seid, Cooper-Marcus, Ensberg and Jacobs43,Reference Wells and Evans44} In adults, contact with nature has been shown to reduce aggressive behaviour and violence in cities. ^{Reference Kuo and Sullivan45} Later in life, exposure to the natural environment is associated with decreased agitation and aggression in patients with late-stage dementia. ^{Reference Whall, Black, Groh, Yankou, Kupferschmid and Foster46} Views of natural environments improve post-operative recovery, with lower fear and anger levels in those experiencing stress. ^{Reference Ulrich, Simons, Losito, Fiorito, Miles and Zelson41,Reference Ulrich47} Physical activity can be an effective supplement to treatment in mild and moderate depression and anxiety disorders. ^{Reference Pedersen and Saltin48,Reference Strohle49} There is, therefore, clearly a process whereby physical activity improves mental health, not only through improving physical health, but also directly through reducing psychiatric symptoms. ^{Reference Richardson, Faulkner, McDevitt, Skrinar, Hutchinson and Piette50}

In contrast, poor housing quality, ^{Reference Evans, Wells, Chan and Saltzman51} living in poor-quality neighbourhoods (e.g. areas vulnerable to vandalism, break-ins, unsafe streets) ^{Reference Caspi, Bolger and Eckenrode52} and high-rise ‘inner city’ accommodation ^{Reference McCarthy, Byrne, Harrison and Keithley53} are all associated with poor mental health.

Cognitive–behavioural therapy (CBT) is a good example of a sustainable intervention (Box 1). It has good clinical evidence and is as effective as drugs in the short term for anxiety conditions and depression, but it is also more effective in preventing relapse. ^{Reference Wells and Evans44} CBT is also cost-effective and potentially has a very low carbon footprint. An example of an innovative sustainable intervention is True Colours (www.truecolours.nhs.uk), an online self-management service for monitoring symptoms and mood (Box 2).

Recommendations for improving sustainability

1. • Shift focus of mental health services towards prevention of mental illness among individuals and communities across the life course. Optimal treatment for mental disorders will only be able to avert 28% of the burden of mental illness; prevention is needed to tackle the other 72%. ^{Reference Andrews, Issakidis, Sanderson, Corry and Lapsley60} Focusing on prevention provides value for money. For example, prevention of conduct disorders could save £150 000 per case in lifetime costs, whereas promoting positive mental health in children with moderate mental health issues could yield benefits over the lifetime of £75 000 per case. ^{Reference Friedli and Parsonage61}

2. • Priority setting should be based on an assessment of the disease burden and its contribution to health inequalities, using cost-effective, high-value, sustainable treatments for

   Fig 1

   Area of balanced health. This diagram explains the values held by society. The triangle demonstrates the three main values of individual, community and environment (natural). The circle represents the area where the values are in a balanced proportion leading to the broader definition of health and well-being. As we have urbanised over the past 20 years, we have shifted our values away from community and environment towards the individual. Valuing the individual at the expense of the environment and community is not only less sustainable, but favours healthcare that treats disease rather than promoting supportive communities and environments. To regain a sense of well-being it is argued that we should change our values and reconnect with the natural environment and community in which we live and work.

   
   which good evidence is available, while decommissioning those with low or uncertain value.

3. • Integrated care should be standard alongside collaborative working with patients, carers and families in co-developing treatment plans to encourage ownership of health.

4. • Early identification will enable significant savings for health services. Estimates show that for every one pound spent there are substantial savings to be made by health and social services: early detection and intervention for psychosis (£17.97 saved), early diagnosis and treatment of depression at work (£5.03 saved), suicide awareness training to general practitioners (GPs) (£43.99 saved), suicide prevention through bridge safety barriers (£54.45 saved). ^{Reference Knapp, McDaid and Parsonage62}

5. • Local government should prioritise health promotion as it shows a favourable effect on survival. ^{Reference Chida and Steptoe63} Subjective well-being increases life expectancy by 7.5 years and provides a similar degree of protection from heart disease to giving up smoking. It also improves recovery and health outcomes in many chronic diseases. ^{Reference Chida and Steptoe63}

6. • Investing in research that will enable the design of evidence-based models of care that take into account environmental and social impacts of healthcare.

Figure 1 demonstrates how balanced mental health is sustainable and public-health focused.