Medical Radiology and Radiation Safety. 2025. Vol. 70. № 3

DOI:10.33266/1024-6177-2025-70-3-70-82

A.N. Koterov1, L.N. Ushenkova1, A.A. Wainson2,
D.Yu. Usupzhanova1, A.Yu. Bushmanov1

‘Healthy Worker Effect’ In Employees of Medical-Biological and Chemical Laboratories: Comparison with Effects in Nuclear Workers, in other Professional Contingents (Meta-Analyses),
and the Role of the Radiation Factor

1 A.I. Burnazyan Federal Medical Biophysical Center, Moscow, Russia

2 N.N. Blokhin Russian Cancer Research Center, Moscow, Russia

Contact person: Alexey N. Koterov, e-mail: Этот адрес электронной почты защищен от спам-ботов. У вас должен быть включен JavaScript для просмотра.

 

Abstract

Based on a search in a supported database of sources for standardized mortality ratio (SMR; compared with the general population) for all causes and all cancer mortality for various professions and types of employment, in PubMed, the Cochrane Library, Elibrary, through Google, Google Scholar and in the reference lists of found sources, a complete/representative sample of studies of SMR all causes and SMR all cancer for personnel of biomedical, agricultural, chemical and some other research laboratories (a total of 39 sources and 3 reviews) was formed. Meta-analyses performed on the basis of this sample demonstrated a high Healthy Worker Effect (HWE) for all causes for the total group of workers, for the group including biomedical, sanitary and agricultural laboratories, and for the group of chemists. SMR (±95 % confidence intervals) were, respectively: 0.63 (0.58; 0.68); 0.65 (0.57; 0.74) and 0.62 (0.56; 0.68). For SMR all cancer HWE, although of a smaller value, it was demonstrated for the first and second groups: 0.85 (95 % CI: 0.75; 0.96) and 0.78 (95 % CI: 0.70; 0.88), respectively. At the same time, for chemists, no excess in mortality from all cancers was noted either: 0.88 (95 % CI: 0.74; 1.05).

The HWE values for laboratory workers were compared with those for occupations characterized by the highest HWE values (cosmonauts/astronauts, athletes, pilots, nuclear workers, and the military; individual studies, meta- and pooled analyses). It was found that the scientific laboratory personnel had a HWE level for SMR all causes comparable to that of athletes and nuclear workers. However, the SMR all cancer index for laboratory researchers was significantly higher than in all comparison groups, with the exception of the military, which is obviously due to contacts with a variety of carcinogenic factors when working in laboratories.

Due to the absence of prerequisites for the formation of HWE characteristic of the compared contingents for the researchers, an assumption was made that the decrease in overall mortality among laboratory personnel may be primarily due to a scientific mindset, which allows them to better navigate the causal dependencies of life and more adequately prevent various consequences, rather than a special lifestyle, increased socioeconomic status and a decrease in the frequency of smoking (as some authors suggest).

Analysis of the influence of the radiation factor (external and internal irradiation) on the studied mortality rates for laboratory workers revealed some effects in relation to certain types of malignant neoplasms (leukemia, myeloma, lung cancer, bone cancer, etc.), but a number of them were not previously recognized as radiation-induced and their increase may be a consequence of the effect of other carcinogenic factors of work in chemical, biochemical, molecular biological and other laboratories.

Keywords: laboratory researchers, biomedical laboratories, chemists, all cause mortality, all cancer mortality, healthy worker effect, radiation exposure

For citation: Koterov AN, Ushenkova LN, Wainson AA, Usupzhanova DYu, Bushmanov AYu. ‘Healthy Worker Effect’ In Employees of Medical-Biological and Chemical Laboratories: Comparison with Effects in Nuclear Workers, in other Professional Contingents (Meta-Analyses), and the Role of the Radiation Factor. Medical Radiology and Radiation Safety. 2025;70(3):70–82. (In Russian). DOI:10.33266/1024-6177-2025-70-3-70-82

 

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Article received: 20.02.2025. Accepted for publication: 25.03.2025.