Cohort Study On The Relationship Between Occupational Stress And Hypertension Of Oil Workers

Objective: To explore and validate the main risk factors of hypertension of oil workers, and study the correlation of oil workers’ occupational stress and hypertension. To provide scientific evidences for prevention and control measures of oil workers’ hypertension. Methods: By the method of cohort study, to take oil workers as the research object who participate in the 2013-2014 survey of occupational stress and physical examination, ruled out previous hypertension, mental illness, genetic history of hypertension and incomplete information. To take the 1354 oil workers completing the baseline survey into the queue who are 22 ~ 60 years old, the average age was(39.77 ± 7.42) years. 2 years of follow-up, the end of the queue made physical examination in hospital, at the same time to fill in "occupational health questionnaire" with the same baseline survey, observing the queue hypertension incidence in the crowd. Results: 1. Compared with domestic norm, oil workers occupational tasks score(172.92 ± 30.32) and personal strain score(103.53 ± 20.82) was significantly higher than the norm, personal resources score(119.21 ± 23.57) was significantly lower than the norm(P<0.01). After the end of the queue, comparing to baseline occupational stess score, occupational tasks, personal strain level and personal resources tended to increase(P<0.05). Different gender, age, education level and shift of oil workers, occupational stress levels are different(P<0.05), male workers occupational tasks and personal strain scores were significantly higher than female; The <35 years age group was higher compared to other age groups in terms of occupational tasks, personal strain; Bachelor degree or above reported higher levels of personal strain than those with high school or less degree; Personal strain score of shift workers was higher than no shift workers, and personal resources score was lower than no shift workers. Gender, personal strain and personal resources had an impact on oil workers’ occupational stress level(P<0.01). 2. This study followed up 1354 oil workers, the cumulative incidence of hypertension was 17.06%, and the incidence of hypertension increased with age increasing and occupational stress level(P<0.01). 3. Multivariate Cox proportional hazards model analysis showed that increasing age, smoking, drinking, overweight and obesity are major risk factors for hypertension(P<0.05). In the multivariate models, after adjusting for factors such as gender, age, shift work according to the previous results, compared with the low exposure group the heavier groups’ risk ratio of hypertension of occupational tasks and personal strain were 1.562(1.072~2.277)、1.701(1.158~2.498)(P<0.05). Overweight occupational tasks increased the risk of hypertension independent of age, drinking history; a strong personal strain increased the risk of hypertension independent of age, smoking history, drinking history and BMI values(P<0.05). 4. If in turn control of the risk factors of hypertension including occupational tasks, personal strain as well as smoking, drinking and BMI values, the crowd incidence of hypertension can be decreased by 12.24%, 14.74%, 15.15%, 12.24% and 17.04%. 5. The area under the ROC curve of occupational tasks and personal strain(AUCs, 95% CI) were 0.573(0.533 ~ 0.613), 0.565(0.525 ~ 0.606), were> 0.5(P<0.01). Conclusion: 1. Age, lifestyle behaviors(smoking, drinking, BMI values) and occupational sress level(occupational role, personal strain) were major risk factors for hypertension oil workers. 2. Cohort study verified that the increasing level of occupational stress was a risk factor for hypertension.