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Socio-behavioural aspects of treatment with medicines CHAPTER 4
promotion of rational and economic prescribing and appropriate medicine use. According to GPP the ob­jective of each element of pharmacy service should be relevant to the individual, clearly defined and effec­tively communicated to all those involved.
In satisfying GPP requirements, professional fac­tors should be the main philosophy underlying prac­tice. Economic factors are also important, but they should not be the driving force. Pharmacists should give their input to decisions on medicine use, and a therapeutic partnership with physicians and good relationships with other pharmacists are important. Pharmacists are also responsible for the evaluation and improvement of the quality of services given. There is a need for keeping patient profiles and to record pharmacistsinterventions (see also Ch. 15). Pharmacists need independent, comprehensive, ob­jective and current information about medicines. They should also accept personal responsibility for lifelong learning and educational programmes should address changes in practice. National standards of GPP need to be put in place and adhered to.
According to the guidelines there are four main elements of GPP: promotion of good health, supply and use of medicines, self-care and influencing pre­scribing and medicine use. It also encompasses coop­eration with other healthcare professionals in health promotion activities, including the minimization of abuse and misuse of medicines. Professional assess­ment of promotional materials for medicines should also be carried out and evaluated as well as informa­tion about medicines and health care disseminated to the public. The involvement in all stages of clinical trials is also recommended. The guidelines include further areas within the four main elements that need to be addressed, such as national standards for facili­ties for confidential conversation, provision of general advice on health matters, involvement in health cam­paigns and the quality assurance of equipment used and advice given in diagnostic testing. In the supply and use of prescribed medicines, standards are need­ed for facilities, procedures and use of personnel. Assessment of the prescription by the pharmacist should include therapeutic aspects (pharmaceutical and pharmacological), appropriateness for the indi­vidual and social, legal and economic aspects.
Furthermore, national standards are needed for information sources, competence of pharmacists and medication records. Advice should be given to ensure that the patient receives and understands sufficient oral and written information. It is also important to have standards on how to follow up the effect of
prescribed treatments and the recording of profes­sional activities. When trying to influence prescribing and medicine use, general rational prescribing policies and national standards are needed. In research and practice documentation, pharmacists have a profes­sional responsibility to document professional prac­tice experience and activities and to conduct and/or participate in pharmacy practice research and therapy research. These guidelines form an international con­sensus on current practice of pharmacy and point to the direction for national guidelines and efforts to improve it.

Outcomes of medical treatment

Evaluation and outcomes research
Evaluation and outcomes research are fairly new topics within pharmacy. They are integral elements of pharmaceutical care and much more effort needs to be put into these aspects of pharmacy practice and research in the future. Evaluation has been defined as making a comparative assessment of the value of the intervention, using systematically collected and ana­lysed data, in order to make informed decisions about how to act or to understand causal mechanisms and general principles. One important aspect from societys point of view is the question What are we getting for our money?According to the model orig­inally proposed by Donabedian, evaluation of health care can focus on:
*
Structure – e.g. facilities, equipment, money, number and qualification of personnel
*
Process – e.g. activities by staff and patients, prescribing, counselling
*
Outcomes – e.g. intermediate outcomes such as patientsknowledge and behaviour, and final outcomes such as cure of the disease.
Traditionally evaluation has focused on structure and process and to a lesser extent on outcomes. More recently a whole new research field has emerged within health care called outcomes research.
One difficulty in health-related outcomes research is to demonstrate the linkages between the three ele­ments of the model: structure–process–outcome. For example, will a new computer-based patient medica­tion record system in the pharmacy (structure) improve the follow-up of a patient (process), so that the pharmacist is able to detect more efficiently a
49
SECTION ONE Pharmacy practice and society
medicine-related problem in the use of the antihyper­tensive medicine with the outcome of lowered blood pressure and the patient feeling better and living a healthier, longer and happier life (outcome)? Even if there is little empirical evidence, it is the general view that good structure leads to a more appropriate pro­cess resulting in better outcomes.
A general observation in the healthcare field is that we still lack evidence of many widely used procedures and interventions. Since the mid 1960s new medi­cines have undergone clinical trials and an official evaluation through the registration process. This does not mean that all medicines currently on the market or being marketed are safe, effective, economic or appropriate. Furthermore, even if we have only high-quality medicines on the market, the outcome of medical treatment is ultimately dependent on how the medicines are being prescribed by physicians and used by patients.
Within the pharmaceutical field a more compre­hensive framework has been proposed by Kozma and his colleagues. This model, named ECHO, clas­sifies outcomes in three categories: economic, clin­ical and humanistic outcomes. Clinical outcomes have been defined as medical events that occur as a result of the condition or its treatment. Economic outcomes are the direct, indirect and intangible costs compared with consequences of medical treat­ment alternatives. Humanistic outcomes include well-being, health-related quality of life and patient satisfaction.
Health-related quality of life
The primary objective of health care is to improve patientsquality of life. To what extent this objective is achieved often remains unanswered. This may be due to lack of proper measures, the knowledge and attitudes of healthcare providers or some other factor. The central feature and objective of pharmaceutical care is to achieve outcomes by identifying, solving and preventing medicine-related problems that will improve a patients quality of life. In experimental settings this has been shown to be the case. To what extent it is achieved in ordinary everyday practice is still an open question.
A classic list of outcomes in medical care has been crystallized in the five Ds’ – death, disease, disability, discomfort and dissatisfaction. These include a wide range of different aspects, but are all negative terms. They will give partial answers to the questions about
the quality of life of the patient, but are not sufficient to cover all aspects of quality of life. The term health­related quality of lifehas been used quite differently in the literature and daily practice. Explicit definitions are quite rare because of the multidimensionality of the concept. The domains of health-related quality of life usually include functional health (physical activi­ty, mobility and self-care), emotional health (anxiety, stress, depression, spiritual well-being) social and role functioning (personal and community interactions, work and household activities), cognitive functioning (memory), perceptions of general well-being and life satisfaction, and perceived symptoms.
Health-related quality of life has been measured with disease-specific instruments and general or g e­neric instruments, e.g. health profiles and measures based on utilities. Disease-specific instruments pro­vide a greater detail concerning functioning and well-being in that particular disease. The disease­specific measures (e.g. those used in hypertension and asthma) can also be further categorized as pop­ulation specific (e.g. elderly), function specific (e.g. sex ual) and condition specific (e.g. pain). Examples of these instruments include the Asthma Quality of Life Questionnaire and the Diabetes Quality of Life Questionnaire.
The generic measures include health profiles, which constitute a number of questions covering the different aspects giving separate scores for each do­main of life mentioned earlier. Examples include the Nottingham Health Profile, Sickness Impact Profile, McMaster Index and SF-36. The advantage of health profiles is that they provide a comprehensive array of scores that is multidimensional. If the measure used is sensitive enough, through the profile we may be able to distinguish, for example, when a medicine influ­ences the emotional domain while having no effect on the functional health domain.
The utility-based measures incorporate specific pa­tient health states while adjusting for the preferences (utilities) for the health state. The outcome scores range from 0 to 1, where 0 represent quality of life associated with death and 1 represents perfect health. The preferences have been empirically tested in differ­ent populations and been through a validation process. These utility-based measures have been extensively used in pharmacoeconomics research and more specif­ically in cost–utility analysis (see Ch. 19).
The most accurate and comprehensive end result may be achieved by using both a generic and a disease­specific measure when possible. The focus in current medicine is more on patient-perceived impact on
50
Socio-behavioural aspects of treatment with medicines CHAPTER 4
long-term morbidity than on limiting mortality. It is good to remember that medicines can both increase and decrease the quality of life. The goal of medical therapy is to improve health and make patients feel better. Physiological measures may change without people feeling any better. Treatment of mildly elevat­ed blood pressure is a good example of this. Never­theless, treatment may improve subjective health without any measurable changes in clinical para­meters. There may also be a trade-off between posi­tive treatment outcomes and adverse events.
Client and patient satisfaction
An important aspect when measuring the outcomes of pharmacy practice and pharmaceutical interventions is the satisfactionof clients and patients. Measurementof client satisfaction can be an important tool in quality assurance of pharmacy practice (see also Ch. 11). There are difficulties in defining the quality of phar­macy services. One approach is to divide the quality into a technical dimension (i.e. what is offered) and a functional dimension (i.e. how it is offered). Different proposals have been made to cover different aspects of serviceprovisionin general. One comprehensivemodel is that by Parasuram. He distinguishes between 10 different dimensions: reliability, responsiveness, com­petence, access, courtesy, communication, credibility, security, understanding/knowing the customer and tangibles. Hedvall has presented a somewhat simpli­fied model. She has proposed four dimensions: profes­sionalism, commitment, confidentiality and milieu, which also contain the essence of what Parasuram has proposed. Customers may have difficulties in distin­guishing between all 10 dimensions and some of them tend to overlap. The proposed dimensions represent important aspects to both prescription and self-care clients visiting the pharmacy. These aspects also have a direct linkage to communication skills and pharma­ceutical care.
Measurement of patient satisfaction has usually focused more specifically on aspects in providing care. Cleary & McNeil have listed the following dimensions that are typically covered in the measurements of patient satisfaction: accessibility and availability of care, convenience, technical quality, physical setting, efficacy, personal aspects of care, continuity and eco­nomic aspects. In these dimensions we can distinguish a technical or cognitively based evaluation of the ser­vices offered and also an emotional or affective aspect – how well they are offered. The significance of client satisfaction can be correlated to patronage, patient adherence, and ultimately to the survival of the phar­macy profession.
KEY POINTS
*
Medicines have a wider function than merely treating disease
*
Rational use of medicines is defined in terms of safety, effectiveness, appropriateness and economics
*
Society expects medicines used to be safe and attempts to achieve this by employing legislation and regulation supported by pharmaco­epidemiological studies
*
Patientsmedicine use behaviour is influenced by complex social and behavioural factors
*
Prescribing is a complex process in which the prescriber has to balance cost, effectiveness, side­effects and the patients wants
*
The professional status of pharmacy can be determined from its role in society and the service characteristics of pharmacists in society
*
Pharmacy is changing from a storage and supply function only to include an advisory and monitoring role in the context of pharmaceutical care
*
Evaluation of health care is achieved by measuring structure, process and outcomes
*
Outcomes may be economic, clinical or humanistic
*
Health-related quality of life can be assessed using disease-specific questionnaires or general health profiles
51
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Chapter Five
Pharmacy and public health
Roger Walker
5
STUDY POINTS
*
The principles of public health
*
The determinants of health and lifestyle determinants of health
*
Different measures of deprivation
*

What is public health pharmacy?

*
Opportunities for pharmacists to be involved in public health pharmacy

Introduction

Over the past 30 years, pha rmacists have received wide recognition for their considerable knowledge, skills and e xpertise in dealing with medicine-related issues at the level of the individual patient. In con­trast, they appear to have struggled with the concept of contributing to the wider public health agenda. Perhapsthishasarisenbecausepharmacistsaremost comfortable operating in situations where they de­termine the agenda and their work is focused on tackling medicine-related issues. Working with other agencies as part of a multidisciplinary team to address population-wide public health issues is a relatively new challenge that requires additional knowledge and skills.
There is an irony to the current situation because for many years pharmacists have addressed a range of public health issues by giving lifestyle advice on issues such as smoking cessation, diet, substance misuse, sex­ual health, alcohol and exercise to the population they serve. Pharmacists have, however, generally failed to recognize these as public health interventions. Perhaps only in recent years has pharmacy started to recognize its public health contribution following the publication
of key government strategies to develop public health pharmacy (Department of Health 2005). This chapter will help the reader better understand the principles of public health and the partnerships required to deliver the public health agenda and identify what the phar­macist can contribute.
What is public health pharmacy?
There are many definitions of public health in com­mon use but perhaps the one most widely used in the UK is: The science and art of preventing disease, prolonging life and promoting health through the or­ganized efforts and informed choices of society (Acheson 1998).
Central to this definition is the concept that promoting public health is not solely an evidence­based science. For those working within public health there is also a need to understand diffe rent sociological groupings within society and work with others to support and persuade the population or sectors within society to make changes that may bring health benefit. This can also be interpreted as promoting a ‘health service’ in which resources are expended on both encouraging people to adopt a healthy lifestyle a nd protecting them from com­municable diseases. This is in contrast to an ill health servicethat many feel the current health­care system resembles and which prim arily targets resources at those who a re ill.
Typically, those employed in public health work across organizations such as local health service bod­ies, local authorities and local communities in settings ranging from acute hospital trusts and local health
SECTION ONE Pharmacy practice and society
organizations through to local authorities, social ser­vices and the voluntary sector. Much of the work is long term and will take several years before any out­comes materialize that will have a lasting impact on health.
As a corollary to the definition of public health presented above, public health pharmacy can be de­fined as: ‘The informed application of pharmaceuti- cal knowledge, skills and resources to promote public health. This d efinition (Walker 2000)reflectsa pragmatic approach to public health pharmacy and can be applied to whatever the preferred definition of public health is. This approach has proved useful to help understand what pharmacy can contribute but it has misled some to believe that public health pharmacy is a discipline in its own right. This is in­correct. Public health requires a multidisciplinary team approach and pharmacy is but one of the con­tributors, and often with a strong focus on medicine­related issues.
If pharmacy restricts its public health contribu­tion to medicine-related issues, and given that taking amedicineisthemostcommoninterventionin health care, it will always be in a position to have some impact on public health. However, to influ­ence the wider determinants of health is more chal­lenging and requires an appreciation that more than 70% of what determines an individualshealthlies outside the domain of the health services and within demographic, social, economic and environmental
conditions. To neglect these wider determinants will result in pharmacy failing to make its o ptimal con­tribution to public health. For example, there is limited o pportunity to improve the health of a pa­tient with asthma by counselling them on the cor­rect use of their inhaler when wider public health issues are i nfluen cing treatment outcome . The indi­vidual may live in poorly heated, damp, infested accommodation, have a low paid job that involves working in a dusty or dirty environment, be poorly educated, have few or no friends or family to sup­port them and have poor mental health. In addition, they may continue to smoke cigarettes, take little exercise and eat too many cheap, high fat content foods. It is clear that these factors will impact on good disease management, but the influential fac­tors are often much less obvious than described above. To be aware of the wider determinants of health is important as each c arries a significant health burden. Moreover, many health burdens have a significant link with deprivation. A number of these are summar ized in Ta b l e 5 . 1 .

Wider determinants of health

Most measures of population health show that it has improved markedly over the past 150 years. For ex­ample, life expectancy in England and Wales has im­proved in every decade since the 1840s. In 1841 life
Table 5.1 Examples of indicators that have been shown to have a significant association with deprivation
Domain Indicator Increased deprivation
significantly associated with indicator
Lifestyle health determinant Smoking Yes
Excess alcohol consumption No Healthy diet Yes Physical inactivity Yes
Health status Obesity Yes
Physical functioning Yes Bodily pain Yes General health Yes Vitality Yes Social functioning Yes Role – emotional Yes Mental health Yes Low birth weight Yes
Continued over
54
Pharmacy and public health CHAPTER 5
Table 5.1 (Continued )
Illness and injury Depression and/or anxiety Yes
Hearing Yes Eyesight Yes Limiting long-term illness Yes Arthritis Yes Back pain Yes Respiratory disease Yes Asthma Yes Diabetes Yes High blood pressure Yes Heart disease Yes Angina Yes Heart failure No Cancer registrations Yes Pedestrian injury 4–16 years reported to police Yes Pedestrian injury 65+ years reported to police Yes Pedestrian injury 5–14 years hospital inpatient Yes
Use of health service Dentist Yes
Family doctor Yes Hospital inpatient (persons) Yes Coronary heart disease admission Yes Angiography Yes Revascularization Yes Hip replacement Yes Knee replacement No Lens replacement No Infant mortality Yes
Deaths All-cause persons Yes
All-cause females Yes All-cause males Yes All cancer Yes Colorectal cancer Yes Lung cancer Yes Breast cancer Yes Coronary heart disease No Stroke Yes Respiratory disease Yes Unintentional injury Yes Road traffic injury Yes Unintentional fall Yes Suicide Yes
expectancy for males was 41 and this had increased to 75 years by 1998. The equivalent improvement for females was from 43 to 80 years of age. Much of the improvement seen has been the result of environmen­tal and social changes rather than developments in medicine and health care. Despite these overall improvements, social inequalities have widened, with improvements in the health of the most disadvan-
taged groups being relatively small. To illustrate these inequalities we can look at the life expectancy of those who live in the most and least deprived areas of our big cities. In Scotland, for example, people living in the most deprived districts of Glasgow have a life ex­pectancy 12 year shorter than those in the most affluent areas (NHS Health Scotland 2004). In London , boroughs a few miles apart have markedly
55
SECTION ONE Pharmacy practice and society
Figure 5.1*Schematic model of the determinants of health (Dahlgren & Whitehead 1991).
different life expectancies. Each of the eight tube stations on the Jubilee line from Westminster to Canning Town represents a decline of one further additional year in life expectancy for the resident population (Department of Health 2004).
The landmark work of Dahlgren & Whitehead
(1991) highlighted the main factors that determine
the health of a given population (Fig. 5.1). The age, gender and genetic make-up of an individual clearly influence the health potential of that individual al­though each is fixedand non-modifiable. Other factors that influence health and which can be modified to have a favourable impact include addressing individual lifestyle factors such as smoking, diet and physical ac­tivity. Improving interactions with friends and relatives, and developing mutual support within a community can help sustain health. Other wider influences on health include living and working conditions, food pro­vision, access to essential goods and services, and the
56
overall socio-economic, cultural and environmental conditions. There are too many factors to discuss in detail here, but a number of the relevant, key determi­nantsare outlined below. However,the simple message is that, whether attempting to evaluate mortality, mor­bidity or self-reported health, and regardless of wheth­er it is income, class, house ownership, deprivation, social exclusion or similar indicator or combination of indicators that is used as the socio-economic indicator, those who are worse off in society have poorer health.
Employment and unemployment
Both employment and unemployment can be associ­ated with adverse effects on health. Job security has also been recognized as important for well-being. The trend towards less secure, short-term employment
Pharmacy and public health CHAPTER 5
Box 5.1
Examples of the health burden on individuals who may be unemployed
*
Increased smoking
*
Increased alcohol consumption
*
Reduced physical activity and exercise
*
Increased use of illicit drugs
*
Increased sexual risk-taking and sexually transmitted diseases
*
Increased weight gain
*
Reduced psychological well-being, e.g. self-harm, depression, anxiety
*
Increased morbidity
*
Increased premature mortality from diseases such as coronary heart disease
*
Social exclusion and isolation
affects everyone but is a particular problem for less skilled manual workers. Unemployment imposes a number of health burdens on the unemployed and some of these are summarized in Box 5.1.
In addition to job security there is considerable evi­dence that greater control over work is associated with positive health such as lower coronary heart disease, fewer musculoskeletal disorders, reduced mental illness and less sickness absence. The relationship between status in the workforce and health has been demonstrat­ed across the gradient from the top jobs to those at the bottom. The landmark studies with civil servants in Whitehall, London (Marmot et al 1984, 1991)demon­strated that even those in the next grade down from the top had worse health than those in the top posts. De­spite being in well paid and relatively secure posts, a health gradient was observed across a range of disorders when compared to those in the top posts.
A confounding issue when trying to interpret the effect of unemployment on health is that people with poorer health are more likely to be unemployed. This is particularly true for people with long-term condi­tions although this does not fully explain why the unemployed have poorer health.
Environment air quality
One of the most enduring images of poor air quality are the photographs taken in the 1950s of London in a dense smog. Pollution arising from the burning of domestic coal accounted for a significant number of premature deaths among Londoners. In the London
smog of 1952 there was almost a threefold increase in death in the over 65s, while deaths from bronchitis and emphysema rose 9.5-fold, pneumonia and influen­za increased 4.1-fold and myocardial degeneration increased almost threefold, along with associated increases in hospital admissions. Although the sulphur dioxide and black smoke from domestic coal is now a thing of the past, other pollutants have taken their place, notably from burning petrol and diesel in cars and other forms of transport. Ambient levels of air pollution continue to be associated with raised morbid­ity and mortality and are particularly hazardous to the elderly, children and those with pre-existing disease.
Crime
Crime affects not only the health of the victim but also that of the community involved. Fear of crime is a real phenomenon that impacts on both health and well-being. As a consequence of crime or the percep­tion of crime, people make adjustments to their life­style and behaviour such as not going out after dark, not going out alone, avoiding certain areas, not using public transport and avoiding young people. Because crime is often concentrated in particular neighbour­hoods and the avoidance measures outlined above are adopted, this can weaken social ties and undermine social cohesion in these neighbourhoods.
Energy and housing
It is recognized that energy obtained from fossil fuels must be reduced to meet international commitments on global warming and reduce their associated adverse impact on health. In many UK cities the trend is for falling use by industry but increased use by transport.
Heating of houses must also become more energy efficient. Typically housing for low income families is the most inefficient with the use of electric fires at standard tariff prices costing three times more than gas central heating. There is a fuel poverty strategy in the UK which seeks to provide heating and insulation improvement for those who spend 10% or more of their income on heating their home. Cold homes ex­acerbate many existing illnesses such as asthma and make the individual prone to respiratory infections (Box 5.2). In addition, fuel poverty brings opportunity loss. Poorfamilies spend a disproportionate amount of their income in keeping warm and this has an adverse effect on their social well-being, ability to adopt a healthy lifestyle and overall quality of life.
57
SECTION ONE Pharmacy practice and society
Box 5.2
Examples of the health burden of poor housing
*
Increased respiratory infections
*
Increased cardiovascular morbidity (cold housing)
*
Increased risk of infection due to overcrowding
*
Increased risk of accidents due to faulty wiring, dangerous appliances, lack of smoke alarms, cluttered conditions
*
Increased risk of infestation with rats and cockroaches and the associated health risks
*
Increased risk of indoor pollutants, e.g. carbon monoxide, radon, lead

Lifestyle determinants of health

The individual lifestyle determinants of health repre­sent the areas in which pharmacy has traditionally made its most significant contribution to public health. It is therefore important to appreciate that poverty is associated with a number of behaviours that may have an adverse impact on health. For example, poor people are less likely to eat a good diet and more likely to have a sedentary lifestyle, be obese and abuse alcohol. Cigarette smoking has one of the strongest associations with social disadvantage, with higher levels recorded in more deprived sectors of the pop­ulation, and this in turn has the greatest cost in terms of premature death.
Smoking
In 2006 tobacco smoking was themain avoidable cause of premature death in the UK, responsible for more than 120 000 deaths. Smoking causes a wide range of serious illnesses including cancer of the lung, respira­tory tract, oesophagus, bladder, kidney, stomach and pancreas, respiratorydisease includingchronicobstruc­tive lung disease and pneumonia, circulatory disease such as heart disease, strokes and aneurysms, and di­gestive disorders such as ulcers of the stomach and duodenum. Second-handsmoke also putsothers at risk and has been linked to lung cancer, strokes, respiratory disorders and infections, particularly in children.
In 2007, before the introduction of the ban on smoking in public in England, Wales and Northern Ire­land (smoking in public was banned in 2006 in Scot­land), approximately 28% of men and 23% of women were smokers, accounting for up to 10 million people
in England alone. This remains a significant problem despite the decline in smoking seen over the past 30 years from the 53% of men and 42% of women who smoked in the mid 1970s. Factors that continue to predict the likelihood of smoking include challenging material circumstances, cultural deprivation and stress­ful marital, personal and household circumstances.
To reducethehealthburdenofsmoking,a number of publichealthstrategies have been putin place and these include reducing the publicsexposuretosecond-hand smoke, providing more support for smokers to stop, raisingpublic awarenessof the health effects of smoking and the benefits of stopping smoking and reducing to­baccoadvertising and theimpactof tobacco promotion, and regulating the sales and design of cigarette packets.
With respect to the no smoking agenda the major contribution of pharmacy is in raising awareness of the harm caused by smoking, supporting strategies to re­duce the adverse impact of smoking on health, identi­fying smokers who want to stop and providing these individuals with behavioural support or referring them to alternative sources of smoking cessation support.
Pharmacists are often in a unique position to dis­cuss smoking cessation and opportunities to raise the topic with individuals who visit them and who may be unhappy with their health, have respiratory problems or dental problems, be proactively seeking other lifestyle advice such as cholesterol or blood pres­sure testing, requesting health-related products such as cough medicines or alternative/complementary therapies such as St Johns wort, purchasing smoking cessation-related products or presenting a prescrip­tion for nicotine replacement therapy, bupropion or varenicline – all are potential windows of opportunity for pharmaceutical intervention.
Weight management
The UK is experiencing one of the worlds fastest growing rates of obesity. In 2006 obesity was consid­ered to be at epidemic proportions with almost 24% of men and women classified as obese and 25% of children aged 11–15 years of age being overweight or obese. Such classification is often based on deter­mining the body mass index (BMI: defined as weight in kilograms divided by the square of height in metres) of an individual. A BMI in the range of 25 kg/m 30 kg/m a BMI of greater than 30 kg/m
2
indicates the individual is overweight while
2
indicates obesity.
Being overweight can seriously affectan individuals health and may lead to high blood pressure, type II
2
to
58