Levels of a human tissue preservative exceed EU limits in most pathological anatomy departments in the United Kingdom

What do you think of the article overall?

“The article is good and presents a sound methodology; it is well-reasoned and the results are clear.”

How does it fit in with existing evidence, and what implications might it have? Could it also affect research staff or other professions?

“In fact, the dangers of formaldehyde have been known for a long time. What this article highlights is that there are workplaces where exposure is higher than it should be and that there are no adequate standardised protocols for measuring concentrations. Any profession or field in which formaldehyde is used could be exposed to high concentrations, posing a health risk.”

What is the situation in Spain?

“As far as I am aware, there are no data on formaldehyde exposure in Spain. I did a quick search on PubMed and found no articles referring to formaldehyde levels in the Spanish working population.”

Are there any significant limitations to bear in mind?

“The data is based on information provided by NHS hospitals; it would have been better if measurements could have been taken to ensure that they were all carried out in the same way. Even so, they provide a good approximation for assessing the problem.”

What do you think of the article overall? Is it of high quality?

“I think it’s a solid study. The authors are internationally renowned, especially Dr. Yates. It’s published in the journal Occupational & Environmental Medicine, which is one of the most highly regarded journals in this field (occupational health). It’s a peer-reviewed journal, which ensures rigorous scientific scrutiny prior to publication. The study uses a very large sample, with over 1.7 million measurements from 117 pathological anatomy departments within the British NHS. A major strength is that it provides real-world data on occupational exposure at a large scale and shows that many departments frequently exceed the EU’s recommended exposure limits.”

How does this fit with existing evidence, and what implications might it have? Could it also affect research staff or other professions?

“It has been known for years that formaldehyde exposure is associated with respiratory irritation, asthma, reproductive disorders, and an increased risk of certain cancers, and it is classified as a human carcinogen; therefore, it can be said that the results are consistent with previous studies. Clearly, the findings may be relevant to other groups exposed to formaldehyde (researchers in biomedical laboratories, universities, veterinarians, the chemical industry, etc.). In my opinion, the main implication of the study is that it highlights that exposure controls in many pathological anatomy laboratories may be insufficient.”

What is the situation in Spain? Are there any data available?

“Spain is aligned with the EU, applying European regulations on occupational exposure to formaldehyde that propose exposure limits stricter than those in force in the United Kingdom; in fact, the article criticizes the United Kingdom for being more lenient regarding exposure limit values. The article does not provide Spanish data, and to the best of my knowledge, there are no national data available to determine whether the situation in Spanish pathological anatomy departments is better or worse than that described in the NHS.”

Are there any significant limitations to consider?

“I don’t see any major limitations. The study is based on the best available information, which means that under these circumstances, there may be limitations stemming from the quality of the information available in the records. In this regard, the registries retrieved by the authors do not provide complete details on the measurement equipment, monitoring protocols, or the specific conditions at each center, and there is also significant heterogeneity in monitoring frequency across hospitals, which makes direct comparisons difficult. These issues are acknowledged by the article’s authors themselves, which highlights the integrity of the research conducted.”