A study of 92,480 Spanish workers found that those with the highest levels of professional burnout had a substantially higher estimated risk of developing type 2 diabetes, especially if they were physically inactive or worked in lower occupational classes. The findings point to a potential workplace health concern, though they do not establish that burnout causes diabetes.
Published in Medical Sciences on September 3, 2026, the research drew on health data from routine occupational check-ups between 2021 and 2023. It focused on adults aged 18 to 69. Researchers excluded people with pre-existing diabetes, cardiovascular disease, cancer or pregnancy, as well as those taking antidiabetic medication, to better isolate risk factors.
On September 1, 2026, the Spanish government approved a reform project to limit hospital shifts for public healthcare workers to 17 hours and introduced stricter rules to address staff overload.
Burnout and diabetes risk
Researchers used the Burnout Assessment Tool, a 23-question survey, to classify burnout as low, moderate or high. They estimated diabetes risk with three established scales: FINDRISC, QDScore and CANRISK. Higher burnout scores corresponded to higher estimated diabetes risk across all three. Burnout itself is not a variable in these risk models, yet its association with risk appeared in the results.
For workers with high burnout and low physical activity, the odds of falling into a moderate or high diabetes risk category were 5.6 times higher than for more active peers. Even those who stayed somewhat active saw their risk double if they reported high burnout. The association was stronger in men and workers from lower social classes. Employees in class III jobs faced nearly double the risk of those in class I.
Why lifestyle matters
The study found that physical inactivity and poor adherence to the Mediterranean diet explained about 45% of the observed link between burnout and diabetes risk, with physical activity accounting for more. But because the study was cross-sectional, it cannot establish whether burnout leads to unhealthy habits or vice versa. There is also some overlap: physical activity is already part of some risk models.
Recent reports say that if a doctor or nurse in Spain is assigned more than five in-person shifts per month, authorities are now required to intervene and add staff to prevent excessive workload. The regulatory move reflects broader European concern about chronic workplace stress and its health impacts.
The study did not follow participants over time to see who actually developed diabetes. Its findings are based on risk estimates, not new diagnoses, and it did not include advanced blood tests such as hemoglobin A1c or oral glucose tolerance. Researchers measured burnout using predefined categories, not individual questionnaire answers, and did not adjust the risk scales for this specific group.
What this means for workplaces
Adding burnout to the risk models improved their ability to distinguish between low- and high-risk individuals, with statistically impressive gains in accuracy. Still, the authors warn against adding burnout to routine diabetes screening for now. Only long-term studies can show whether reducing burnout will actually lower diabetes rates.
The study’s basic strength is its size and the consistency of results across different risk tools. It does not prove that burnout causes diabetes or that treating burnout will prevent it. Instead, it points to a possibility: workplace stress may be an overlooked factor in cardiometabolic health, especially for people who are already inactive or in lower socioeconomic groups.
As job stress and chronic disease rise in Spain, the research highlights the need for more study and targeted action. Employers and policymakers cannot ignore the connection between mental strain and physical health. Burnout is more than a personal struggle; it is a public health issue with measurable consequences.
