When we speak about “catching” a health issue early, we are already acknowledging that a change has occurred. In Occupational Health, our purpose is to begin one step earlier: creating workplaces in which preventable illness does not develop in the first place.

Occupational Health is primarily a preventive discipline. Its practitioners need to understand how work may affect health, identify potential hazards and introduce effective controls before employees suffer harm. This is known as primary prevention, and it represents the strongest form of workforce protection. It is also important for these principles to be understood, at least at some level, by those who control the workplace, i.e. managers.

In general medicine, primary prevention includes measures such as vaccination and maintaining a healthy lifestyle. Within the workplace, it begins with developing a thorough and accurate understanding of the environment in which people operate. This means identifying potential exposure to noise, chemicals, dust, vibration, biological hazards, physical strain or other risks, and then taking appropriate steps to eliminate or reduce them. In summary, we believe that when or if exposure cannot be removed completely, suitable controls and possibly personal protective equipment must be introduced and consistently monitored. The ideal outcome is always to ensure that the employee remains healthy because the risk was properly understood and managed.

There are, however, circumstances in which early changes still occur. This is where so-called secondary prevention becomes essential. Secondary prevention is the early detection of a developing health condition, followed by prompt intervention to halt or slow its progression.

In general healthcare, familiar examples include cancer screening, blood-pressure monitoring and routine health checks. In Occupational Health, health surveillance serves a similar purpose. Audiometry, for example, can identify early changes in an employee’s hearing that may suggest noise-induced hearing loss. That finding creates an opportunity to investigate the exposure, strengthen workplace controls and protect the employee’s remaining hearing before the condition becomes more serious.

This is the true value of catching an issue early: it creates time to act.

There is also tertiary prevention, which focuses on reducing the long-term effects of an established disease. While this remains important for the individual concerned, Occupational Health should seek to avoid ever reaching this stage. An occupational disease that has become established may indicate that an opportunity to prevent exposure or detect its effects earlier has been missed.

Employers therefore need to consider occupational disease with the same seriousness they apply to workplace accidents. Accidents are often immediate and visible, whereas occupational illnesses may develop gradually and remain unnoticed for months or even years. Yet work-related diseases account for a substantial proportion of occupational harm worldwide.

The consequences extend well beyond an individual diagnosis. For an employee, occupational illness may affect their health, income, independence and quality of life. For an organisation, it can lead to absence, reduced productivity, loss of specialist knowledge, compensation costs, regulatory action and serious reputational damage. Most importantly, occupational diseases are entirely preventable when workplace risks are properly identified and managed.

A strong Occupational Health programme is therefore not simply a response mechanism or a series of medical examinations. It is an ongoing partnership between employers, employees, safety professionals and healthcare practitioners. It uses workplace knowledge, clinical insight and reliable data to identify where intervention is needed and whether existing controls are working.

At Medilink International, our purpose is centered on good health. This means being prepared to introduce Occupational Health into conversations with clients, even where the subject may not yet be receiving sufficient attention. In some cases, this means helping an organisation begin its Occupational Health journey. In others, it means reviewing existing measures and identifying opportunities to make prevention stronger.

Catching a health issue early can change an outcome. Preventing it from occurring can change an entire workplace.

About the author: Dr Stephen Jones is the Chief Medical Adviser at Medilink International