Occupational health is an area of work in public health to promote and maintain highest degree of physical, mental and social well-being of workers in all occupations.
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Its objectives are:
- the maintenance and promotion of workers’ health and working capacity;
- the improvement of working conditions and the working environment to become conducive to safety and health;
- the development of work organization and working cultures that should reflect essential value systems adopted by the undertaking concerned, and include effective managerial systems, personnel policy, principles for participation, and voluntary quality-related management practices to improve occupational safety and health.
The science and practice of occupational health involves several disciplines, such as occupational medicine, nursing, ergonomics, psychology, hygiene, safety and other.
The World Health Assembly urges countries to
- develop national policies and action plans and to build institutional capacities on occupational health,
- scale up the coverage with essential interventions for prevention and control of occupational and work-related diseases and injuries and occupational health services
- ensure in collaboration with other relevant national health programmes such as those dealing with communicable and non-communicable diseases, prevention of injuries, health promotion, mental health, environmental health, and health systems development.
What determines the health of workers
Economically active people spend on an average about one third of their time at the workplace. Employment and working conditions have powerful effects on health equity. Good working conditions can provide social protection and status, personal development opportunities, and protection from physical and psychosocial hazards. They can also improve social relations and self esteem of employees and lead to positive health effects.
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The health of workers is an essential prerequisite for household income, productivity and economic development. Therefore, restoring and maintaining working capacity is an important function of the health services.
Health risks at the workplace, such as heat, noise, dust, hazardous chemicals, unsafe machines and psychological stress, cause occupational diseases and can aggravate other health problems. Conditions of employment, occupation and the position in the workplace hierarchy also affect health. People working under stress or with precarious employment conditions are likely to smoke more, exercise less and have an unhealthy diet.
In addition to general health care, all workers – and particularly those in high-risk occupations – need health services to assess and reduce exposure to occupational risks, as well as medical surveillance for early detection of occupational and work-related diseases and injuries.
Chronic respiratory diseases, musculoskeletal disorders, noise-induced hearing loss and skin problems are the most common occupational diseases. Yet only one third of countries have programmes in place to address these issues.
Work-related noncommunicable diseases (NCDs) as well as cardiovascular diseases and depression caused by occupational stress result in increasing rates of long-term illness and absence from work. Occupational NCDs include occupational cancer, chronic bronchitis and asthma caused by air pollution in the workplace and radiation.
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Despite these diseases, in the majority of countries physicians and nurses are not adequately trained to address work-related health problems and many countries do not offer postgraduate education in occupational health.
Health coverage of workers
Work-related health problems result in an economic loss of 4–6% of GDP for most countries. About 70% of workers do not have any insurance to compensate them in case of occupational diseases and injuries.
Universal health coverage combines access to services needed to achieve good health (health promotion, prevention, treatment and rehabilitation, including those that address health determinants) with the financial protection that prevents ill health leading to poverty.
There are effective interventions to prevent occupational diseases. For example encapsulation of pollution sources, ventilation, noise control, substitution of dangerous chemicals, improvement of furniture and the organization of work.
The task of specialized occupational health services is to assess these risks and develop recommendations for prevention of occupational and work-related diseases. Workers at risk need regular medical check-ups to detect any health problem at an early stage, when treatment and modification of the workplace can help avoid permanent damage.
Currently, specialized occupational health services are available only for 15% of workers across the world, primarily in big companies that offer health insurance and employment injury benefits. With the ongoing global job crisis, more and more people seek labour in the informal sector without any insurance cover and no occupational health services. Many such workers often also work in hazardous conditions and suffer work-related diseases, injuries and disabilities. In many communities, when the breadwinner falls sick the entire family suffers as there is no social protection.
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Primary care centres can deliver some basic occupational services for workers in the informal sector and in small enterprises in the community. Most often they carry out workplace visits with recommendations for improvement, and conduct preliminary and periodic medical examinations, diagnosis and reporting of occupational and work-related diseases. Primary care centres could also train and work with health volunteers and workplace safety representatives to implement simple measures for the prevention of occupational diseases and provide advice on safer working methods. The costs of these services varies between US$ 18 and US$ 60 (purchasing power parity) per worker. Their benefits would include:
- improvements in the workplace even after the first visit;
- detecting and managing work-related health problems at an early stage; and
- educating and involving working communities in the protection of their health.
Research has demonstrated that workplace health initiatives can help reduce sick leave absenteeism by 27% and health-care costs for companies by 26%.
- In many countries more than half of workers are employed in the informal sector with no social protection for seeking health care and lack of regulatory enforcement of occupational health and safety standards.
- Occupational health services to advise employers on improving working conditions and monitoring the health of workers cover mostly big companies in the formal sector and more than 85% of workers in small enterprises, informal sector, agriculture and migrants worldwide do not have any occupational health coverage.
- Certain occupational risks, such as injuries, noise, carcinogenic agents, airborne particles and ergonomic risks account for a substantial part of the burden of chronic diseases: 37% of all cases of back pain, 16% of hearing loss, 13% of chronic obstructive pulmonary disease, 11% of asthma, 8% of injuries, 9% of lung cancer, 2% of leukaemia and 8% of depression.
- Annually 12.2 million people, mostly in developing countries, die from noncommunicable diseases while still of active working age.
- Work-related health problems result in an economic loss of 4–6% of GDP for most countries. The basic health services to prevent occupational and work-related diseases cost on average between US$ 18 and US$ 60 (purchasing power parity) per worker.
- About 70% of workers do not have any insurance to compensate them in case of occupational diseases and injuries.
- Research has demonstrated that workplace health initiatives can help reduce sick leave absenteeism by 27% and health-care costs for companies by 26%.
Primary care centres could provide some essential interventions for protecting workers’ health, such as advice for improving working conditions, detection of occupational diseases and health surveillance of workers, though in most countries the focus is still on medical treatment rather than prevention.