The phrase "a single occupational" is correct and usable in written English.
It can be used when referring to one specific job or profession within a broader context.
Example: "In this study, we focus on a single occupational group to analyze the effects of remote work."
Alternatives: "one specific occupation" or "a solitary profession".
Since, no job accounted for a very small proportion of the total occupations, we combined "farmer" and "no job" into a single occupational category.
This feature is important since we are studying mobility patterns out of the unskilled service occupations and the number of observations falls rapidly when one focuses on a single occupational class.
Some studies do not find the relationship between protective measures undertaken and symptoms of intoxication [ 19, 27], probably reflecting the difficulty in analyzing a single occupational risk factor, without taking other closely related factors into account at the same time.
Data from a single occupational study of 58 men (Hollingsworth et al. 1956) were used in conjunction with animal studies to derive acute and chronic exposure levels in the air considered to pose the minimal risk to humans (ATSDR 2004).
Research on the use of 3-nitobenzanthrone as a biomarker is limited to a single occupational exposure study, where detectable levels of 3-aminobenanthrone were detected in 24-hr urine specimens from a small group of salt miners.
The other two were the tuberculosis studies, with one reporting the cost to prevent a single occupational case of tuberculosis in the next 41 years [ 19] and the other reporting the cost per tuberculosis case prevented and the cost per life saved [ 23].
Hairdressers belong to the largest single occupational group with a probable exposure to phthalates and possibly other endocrine disrupting chemicals [ 14].
The Wismut cohort is one of the largest single occupational cohorts and one of only a few cohorts with detailed information on the number of shifts worked underground.
Therefore, high individual risks can only be taken into consideration based on the incidence in the single occupational groups.
Much research in this area to date has focussed on the perceptions and practices of single occupational groups (especially nurses).
Reis [ 30] tested a self-assessment of physical activity related to work, the occupational physical activity questionnaire (OPAQ), which they correlated with the single occupational question from the BRFSS.
