Annals of Occupational and Environmental Medicine

Original Article

Association between ambient particulate matter levels and hypertension: results from the Korean Genome and Epidemiology Study: Sewhan Na, Jong-Tae Park, Seungbeom Kim, Jinwoo Han, Saemi Jung, Kyeongmin Kwak; Ann Occup Environ Med 2023;35:e51. Published online December 4, 2023; DOI: https://doi.org/10.35371/aoem.2023.35.e51

Abstract Abstract in Korean PDF Supplementary Material PubReader ePub: Background
Recently, there has been increasing worldwide concern about outdoor air pollution, especially particulate matter (PM), which has been extensively researched for its harmful effects on the respiratory system. However, sufficient research on its effects on cardiovascular diseases, such as hypertension, remains lacking. In this study, we examine the associations between PM levels and hypertension and hypothesize that higher PM concentrations are associated with elevated blood pressure.
Methods
A total of 133,935 adults aged ≥ 40 years who participated in the Korean Genome and Epidemiology Study were analyzed. Multiple linear regression analyses were conducted to investigate the short- (1–14 days), medium- (1 and 3 months), and long-term (1 and 2 years) impacts of PM on blood pressure. Logistic regression analyses were conducted to evaluate the medium- and long-term effects of PM on blood pressure elevation after adjusting for sex, age, body mass index, health-related lifestyle behaviors, and geographic areas.
Results
Using multiple linear regression analyses, both crude and adjusted models generated positive estimates, indicating an association with increased blood pressure, with all results being statistically significant, with the exception of PM levels over the long-term period (1 and 2 years) in non-hypertensive participants. In the logistic regression analyses on non-hypertensive participants, moderate PM₁₀ (particulate matter with diameters < 10 μm) and PM_2.5 (particulate matter with diameters < 2.5 μm) levels over the long-term period and all high PM₁₀ and PM_2.5 levels were statistically significant after adjusting for various covariates. Notably, high PM_2.5 levels of the 1 year exhibited the highest odds ratio of 1.23 (95% confidence interval: 1.19–1.28) after adjustment.
Conclusions
These findings suggest that both short- and long-term exposure to PM is associated with blood pressure elevation.; 대기 중 미세먼지 농도와 고혈압과의 연관성: 한국인유전체역학조사사업 자료를 기반으로
목적
환경보건에서 대기 중 미세먼지 농도의 중요성이 갈수록 커지고 있으나 아직 미세먼지 농도와 고혈압과의 연관성에 대한 연구 결과가 충분하지 못하여 확실한 결론을 내리기 어려운 상황에 처해있다. 본 연구는 대기 중 미세먼지 노출과 혈압 상승의 상관관계를 밝히는 데에 목적을 두고 있다.
방법
본 연구는 질병관리청 국립보건연구원에서 담당하고 있는 한국인유전체역학조사사업 코호트와 대기오염 모니터링 자료가 연계된 데이터에서 추출한 133,935 명을 대상으로 하였다. 다중선형 회귀분석과 로지스틱 회귀분석을 수행하여 대기 중 미세먼지 농도와 혈압 수준과의 상관관계를 평가하였다.
결과
다중선형 회귀분석에서는 성별, 나이 등과 같은 공변수들을 보정하기 전과 후 모두 통계적으로 유의하게 미세먼지 농도가 증가할수록, 혈압이 상승하였다. 로지스틱 회귀분석에서 고혈압의 오즈비(odds ratio; OR)는 높은 대기 중 미세먼지 농도에 노출된 참여자들에서 통계적으로 유의하게 증가한 반면, 중등도의 미세먼지 농도에 노출된 참여자들에서는 노출기간에 따라 결과가 달라지는 양상을 보였다.
결론
본 연구의 결과는 대기 중 미세먼지 노출이 고혈압 위험도 증가와 관련될 수 있음을 시사한다.

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Original Article

The effect of blood cadmium levels on hypertension in male firefighters in a metropolitan city: Ye-eun Jeon, Min Ji Kim, Insung Chung, Jea Chul Ha; Ann Occup Environ Med 2022;34:e37. Published online November 8, 2022; DOI: https://doi.org/10.35371/aoem.2022.34.e37

Abstract Abstract in Korean PDF Supplementary Material PubReader ePub

Background

This study investigated the effect of dispatch frequency on blood cadmium levels and the effect of blood cadmium levels on hypertension in male firefighters in a metropolitan city.

Methods

We conducted a retrospective longitudinal study of male firefighters who completed the regular health checkups, including a health examination survey and blood cadmium measurements. We followed them for 3 years. To investigate the effect of dispatch frequency on blood cadmium levels and the effect of blood cadmium levels on hypertension, we estimated the short-term (model 1) and long-term (model 2) effects of exposure and hypothesized a reversed causal pathway model (model 3) for sensitivity analysis. Sequential conditional mean models were fitted using generalized estimating equations, and the odds ratios (ORs) and the respective 95% confidence intervals (CIs) were calculated for hypertension for log-transformed (base 2) blood cadmium levels and quartiles.

Results

Using the lowest category of dispatch frequency as a reference, we observed that the highest category showed an increase in blood cadmium levels of 1.879 (95% CI: 0.673, 3.086) μg/dL and 0.708 (95% CI: 0.023, 1.394) μg/dL in models 2 and 3, respectively. In addition, we observed that doubling the blood cadmium level significantly increased the odds of hypertension in model 1 (OR: 1.772; 95% CI: 1.046, 3.003) and model 3 (OR: 4.288; 95% CI: 1.110, 16.554). Using the lowest quartile of blood cadmium levels as a reference, the highest quartile showed increased odds of hypertension in model 1 (OR: 2.968; 95% CI: 1.121, 7.861) and model 3 (OR: 33.468; 95% CI: 1.881, 595.500).

Conclusions

We found that dispatch frequency may affect blood cadmium levels in male firefighters, and high blood cadmium levels may influence hypertension in a dose-response manner.

대도시 남성 소방관에서의 혈중 카드뮴 농도가 고혈압에 미치는 영향
목적
본 연구에서는 대도시 남성 소방관에서 출동빈도가 혈중 카드뮴 농도에 미치는 영향과 혈중 카드뮴 수치가 고혈압에 미치는 영향을 조사하였다.
방법
남성 소방관들을 대상으로 설문조사와 혈중 카드뮴 농도 및 혈압 측정을 포함하는 건강검진을 실시하였다. 2015년부터 2017년까지 3년 간 추적하였으며, 최종 연구 대상자는 215명이었다. 출동빈도가 혈중 카드뮴 농도에 미치는 영향과 고혈압에 대한 혈중 카드뮴 농도의 영향을 조사하기 위해 단기간 노출 효과 (모델1), 장기간 노출 효과 (모델2), 역방향 노출 효과(모델3)를 가정하여 분석하였다. 순차적 조건부 평균 모델 (sequential conditional mean model)을 적용하였고, 일반화 추정 방정식 (generalized estimating equations)을 사용하여 오즈비와 95% 신뢰구간을 계산하였다.
결과
가장 낮은 사분위의 출동 빈도 그룹을 기준으로 가장 높은 사분위수 그룹은 모델 2와 모델3에서 혈중 카드뮴 수치가 각각 1.879 (95% CI 0.673-3.086) μg/dL, 0.708 (95% CI 0.023-1.394) μg/dL 증가하였다. 혈중 카드뮴 농도가 두 배로 증가할 때마다 모델 1과 3 (OR [95% CI] 1.772 [1.046–3.003], 4.288 [1.110–16.554])에서 고혈압 발생 위험이 증가한다는 것을 관찰했다. 혈중 카드뮴 농도가 가장 낮은 사분위수 그룹을 기준으로 할 때, 가장 높은 사분위수 그룹은 모델 1과 3(OR [95% CI] 2.968 [1.121–7.861], 33.468 [1.881–595.500])에서 고혈압 발생 위험이 증가하였다. 혈중 카드뮴 농도와 고혈압 발생 사이의 용량-반응 관계는 모든 시나리오에서 관찰되었다.
결론
본 연구에서는 출동 빈도가 혈중 카드뮴 농도에 영향을 미칠 수 있고, 높은 혈중 카드뮴 농도가 고혈압에 영향을 미칠 수 있다는 것을 발견했다. 다양한 연구모집단에 대해 카드뮴의 다양한 생체지표를 사용하여 추가 연구가 수행되어야 할 것이다. 또한 일반적으로 단일 중금속 노출보다는 복합 중금속 노출의 가능성이 높으므로, 향후 연구에서는 중금속의 상호작용에 대해 평가하여야 할 것이다.

Citations

Citations to this article as recorded by

Internal Flames: Metal(loid) Exposure Linked to Alteration of the Lipid Profile in Czech Male Firefighters (CELSPAC-FIREexpo Study)
Nina Pálešová, Katarína Řiháčková, Jan Kuta, Aleš Pindur, Ludmila Šebejová, Pavel Čupr
Environmental Science & Technology Letters.2024; 11(7): 679. CrossRef
Heavy metal exposure linked to metabolic syndrome in Korean male firefighters: FRESH cohort cross-sectional analysis
Jee Eun Choi, Mun-Joo Bae, Mi-Ji Kim, Sung Soo Oh, Ki Soo Park, Chan Joo Lee, Sungha Park, Sang-Baek Koh, Jaelim Cho, Changsoo Kim
Scientific Reports.2023;[Epub] CrossRef

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Research Article

Effect of night shift work on the control of hypertension and diabetes in workers taking medication: Juha Park, Sang-Yeop Shin, Yangwon Kang, Jeongbae Rhie; Ann Occup Environ Med 2019;31:e27. Published online October 10, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e27

Abstract PDF PubReader ePub

Background

Night shift work induces physiological and psychological stress by altering sleep and biological rhythms and is associated with hypertension, diabetes, obesity, and cardiovascular diseases. Few studies have been conducted on the control of hypertension and diabetes. This study aimed to examine the effect of night shift work on the control rate of hypertension and diabetes.

Methods

Subjects comprised workers aged 20–65 years who underwent specific health examination at a single facility in seven different affiliated examination centers from 1 January to 31 December 2016. Workers were categorised into day workers and night shift workers. Demographic and medical history were taken, and physical examination was done. Blood pressure (BP) and fasting glucose were measured. The control rate of each disease was evaluated based on treatment goals presented in the treatment guidelines of the Korean Society of Hypertension and the Korean Diabetes Association (systolic BP < 140 mmHg and diastolic BP < 90 mmHg; fasting glucose ≤ 130 mg/dL).

Results

Among 631,418 subjects, 11.2% (70,450) were night shift workers. Of whom 6.1% (4,319) were taking antihypertensive medication and 2.5% (1,775) were taking diabetes medication. Among patients taking antihypertensive medications, the proportion of those whose BP was controlled to suit treatment goals was 81.7% (26,635) of day workers and 77.4% (3,343) of night shift workers, which was significantly different (p < 0.001). Among patients taking diabetes medications, the proportion of those whose blood glucose was controlled to suit treatment goals was 37.4% (4,489) of day workers and 36.5% (647) of night shift workers, but the difference was not significant. The control rates for patients taking antihypertensive medications (odds ratio [OR]: 0.74, 95% confidence interval [CI]: 0.68–0.80) were lower among night shift workers than day workers with adjustment for age, sex, smoking history, alcohol consumption, exercise, and obesity. However, there were no differences in control rates for patients taking diabetes medications (OR: 0.99, 95% CI: 0.87–1.10) between day workers and night shift workers.

Conclusions

Night shift work can have an effect on the uncontrolled BP in workers taking antihypertensive medications. Therefore, additional efforts for disease control are necessary for night shift workers with hypertension.

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Research Article

A study of relationship between blood mercury concentration and hypertension in residents living in old mine fields and related factors: Jeong Woo Kim, Byoung Gwon Kim, Jeong Woo Park, Jong Woo Yi, Jung Il Kim, Young Seoub Hong; Ann Occup Environ Med 2019;31:e6. Published online May 30, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e6

Abstract PDF PubReader ePub

Background

In Korea, around the abandoned metal mines, heavy metals are being accumulating in the cultivated areas. Among exposed heavy metals, mercury is known to harm for cardiovascular system known to affect blood pressure. So, we studied the relationship between blood mercury level and hypertension in residents around abandoned metal mines.

Methods

From 2008 to 2011, we surveyed 7,055 residents in provinces affected by abandoned metal mines and collected data from 6 Hospitals. We conducted a personal questionnaire interview survey with residents on the basis of household questionnaires, sex, age, household income, smoking, and drinking items. Multiple logistic regression analysis was performed to investigate the association between blood mercury level and hypertension.

Results

We compared residents with low and high groups based on blood mercury level 5.8 μg/L, and higher group was significantly higher risk of hypertension than lower group (odds ratio [OR]: 1.277; 95% confidence interval [CI]: 1.135–1.436), also in adjusted model, higher group was significantly higher risk of hypertension than lower group (OR: 1.276; 95% CI: 1.117–1.457).

Conclusions

This study showed a significant correlation between mercury and hypertension in residents around abandoned metal mines. Therefore, we should continuously monitor people who are higher than the standard value and the hypertensive patients.

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Research Article

Association between serum ferritin and hypertension according to the working type in Korean men: the fifth Korean National Health and nutrition examination survey 2010–2012: Dong-Hoon Lee, Seong-Kyu Kang, Won-Jun Choi, Kyeong Min Kwak, Dukyun Kang, Sang Ha Lee, Jun-Hyung Lee; Ann Occup Environ Med 2018;30:40. Published online June 11, 2018; DOI: https://doi.org/10.1186/s40557-018-0251-y

Abstract PDF PubReader ePub

Background

Several studies suggest that serum ferritin concentrations reflect systemic inflammation, and high ferritin levels can increase the risk of hypertension in adult men. Shift work is also known to increase the risk of hypertension; however, there has been no study about the relationship between serum ferritin levels and the prevalence of hypertension according to the working type.

Methods

This cross-sectional study included 4,442 male participants (3,651 daytime workers and 791 shift workers) who participated in the fifth Korean National Health and Nutrition Examination Survey. Hypertension was defined as a systolic blood pressure greater than or equal to 140 mmHg, a diastolic blood pressure greater than or equal to 90 mmHg or the current use of antihypertensive medications regardless of blood pressure values. For the statistical analyses, serum ferritin levels were reclassified into quartiles, and complex sample analyses were used to evaluate the relationship between serum ferritin levels and the prevalence of hypertension according to the working type in this study.

Results

Serum ferritin and shift work were positively associated with the prevalence of hypertension. The effect of interaction was above multiplicative. When compared to participants in the lowest serum ferritin quartile, the odds ratio for hypertension for participants in the highest serum ferritin quartile was 1.372 (1.027–1.833) in daytime workers and 2.009 (1.042–3.873) in shift workers after adjustment.

Conclusions

The prevalence of hypertension increased as ferritin levels increased in individuals, especially in shift workers.

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Research Article

Effect of shift work on hypertension: cross sectional study: Jeong Han Yeom, Chang Sun Sim, Jiho Lee, Seok Hyeon Yun, Sang Jin Park, Cheol-In Yoo, Joo Hyun Sung; Ann Occup Environ Med 2017;29:11. Published online April 11, 2017; DOI: https://doi.org/10.1186/s40557-017-0166-z

Abstract PDF PubReader ePub

Background

The need of efficient resource management and full-time accessibility to resources has increased with the development of industry, resulting in the increase of shift workers. Previous researches of past decades show that there are various health effects on shift workers. However, the definition and the form of shift work have varied from each research and occupational harmful factors except for shift work have not been excluded completely in previous researches. Therefore, in this research, we tried to find out the effect of shift work focusing on the hypertension. To complement previously mentioned weakness of other researches, we performed our research on participants to whom we could minimize other risk factors excluding shift work.

Methods

This research examined 1,953 petrochemical plant male workers (shift work 1,075, day worker 878) who did medical checkup from 1st Jan. 2014 to 31th Dec. 2014 in a general hospital located in Ulsan, based on their medical records and questionnaires. With the questionnaire, we found out their basic information including age, social status, occupational history, and we took their physical measurements.

Results

Compared to day workers, shift workers’ odds ratio of developing hypertension was 1.31 (95% CI 0.98–1.75). After adjusting confounding variables, adjusted odds ratio for entire subjects was 1.51 (95% CI 1.11–2.06). Also, for subjects who were in continuous service for over 20 years, odds ratio was 1.51 (95% CI 1.08–2.11).

Conclusions

Shift workers had a higher chance of hypertension than day workers do. Particularly, the longer the workers work continuously, the risk of hypertension getting higher.

Citations

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Research Article

The current condition of the workers’ general health examination in South Korea: a retrospective study: Young Joong Kang, Jun-Pyo Myong, Huisu Eom, Bowha Choi, Jong Heon Park, Eun-A L Kim; Ann Occup Environ Med 2017;29:6. Published online March 7, 2017; DOI: https://doi.org/10.1186/s40557-017-0157-0

Abstract PDF PubReader ePub

Background

Business owners in the Republic of Korea must take part in the workers’ general health examination. However, there have been few formal analyses of the uptake of this examination by employees. In the present study, we examined the rates of participation in medical examinations according to age group, health insurance type, and enterprise size, and then compared these results with those of the national general health screening. Furthermore, we determined the distribution of patients with abnormal results for diabetes and hypertension, and outlined the significance and history of domestic health examinations.

Methods

We started by comparing participation rates extracted from the among health examination data of the National Health Insurance Service from 2006–2013 by sex, age, insurance type, and enterprise size of workplace health insurance beneficiaries (i.e., those whose insurance is provided by their workplace). In addition, we analyzed the prevalence rates of abnormal results for hypertension and diabetes, and explored the history and significance of health examinations in the Republic of Korea.

Results

The overall participation rate in the primary health examination in 2006 was 56%, and this increased to 72% in 2013. However, the rates of the secondary screening did not increase much. Among workplace policyholders (i.e., those whose insurance is provided by their workplace), the participation rates of workers in enterprises with less than 50 employees were lower than were those in enterprises with 50 or more employees. Notably, the rates and odds ratios of patients with abnormal results for diabetes and hypertension were relatively high, particularly among those working in smaller enterprises.

Conclusions

Although the workers’ general health examination has been replaced with the national general health screening, it remains necessary to ensure uniform health management services among all workers in the Republic of Korea. This can, in turn, promote occupational health and improve working conditions throughout the Republic of Korea.

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Research Article

Effect of Long Working Hours on Self-reported Hypertension among Middle-aged and Older Wage Workers: Dong Hyun Yoo, Mo-yeol Kang, Domyung Paek, Bokki Min, Sung-il Cho; Ann Occup Environ Med 2014;26:25-25. Published online September 3, 2014; DOI: https://doi.org/10.1186/s40557-014-0025-0

Abstract PDF PubReader ePub

Objectives

Many studies have reported an association between overwork and hypertension. However, research on the health effects of long working hours has yielded inconclusive results. The objective of this study was to identify an association between overtime work and hypertension in wage workers 45 years and over of age using prospective data.

Methods

Wage workers in Korea aged 45 years and over were selected for inclusion in this study from among 10,254 subjects from the Korean Longitudinal Study of Ageing. Workers with baseline hypertension and those with other major diseases were excluded. In the end, a total of 1,079 subjects were included. A Cox proportional hazards model was used to calculate hazard ratios and adjust for baseline characteristics such as sex, age, education, income, occupation, form of employment, body mass index, alcohol habit, smoking habit, regular exercise, and number of working days per week. Additional models were used to calculate hazard ratios after gender stratification.

Results

Among the 1,079 subjects, 85 workers were diagnosed with hypertension during 3974.2 person-months. The average number of working hours per week for all subjects was 47.68. The proportion of overtime workers was 61.0% (cutoff, 40 h per week). Compared with those working 40 h and less per week, the hazard ratio of subjects in the final model, which adjusted for all selected variables, working 41-50 h per week was 2.20 (95% confidence interval [CI], 1.19–4.06), that of subjects working 51-60 h per week was 2.40 (95% CI, 1.07–5.39), and that of subjects working 61 h and over per week was 2.87 (95% CI, 1.33–6.20). In gender stratification models, the hazard ratio of the females tended to be higher than that of the males.

Conclusion

As the number of working hours per week increased, the hazard ratio for diagnosis of hypertension significantly increased. This result suggests a positive association between overtime work and the risk of hypertension.

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Original Article

The Association Between Hypertension and Lifestyle in Express Bus Drivers: Jin Woo Lee, Nam Soo Lee, Kyung Jae Lee, Joo Ja Kim; Korean Journal of Occupational and Environmental Medicine 2011;23(3):270-278. Published online September 30, 2011; DOI: https://doi.org/10.35371/kjoem.2011.23.3.270

Abstract PDF: OBJECTIVES
To examine whether or not there is an association between blood pressure and lifestyle habits in male express bus drivers.
METHODS
The study subjects were 249 male express bus drivers. The data was obtained from annual health surveillance. A structured questionnaire was used to assess smoking, alcohol consumption, exercise, daily hours of sleep, work duration and weekly working hours. The subjects' BMI (Body Mass Index) was classified using the World Health Organization diagnostic criteria for obesity in Asians, and their blood pressure was classified according to the JNC (Joint National Committee) 7 classification. Multiple cases of logistic regression modeling were used to determine associations between hypertension and the subjects' common characteristics, lifestyle habits and obesity were used as the independent variables.
RESULTS
We found that lack of sleep was associated with hypertension (OR 1.85, 95% CI 1.01~3.39) and obesity was also associated with hypertension (OR 2.81, 95% CI 1.59~4.98).
CONCLUSIONS
These results indicate that daily hours of sleep and obesity were associated with hypertension in male express bus drivers. Due to the characteristics of this job, such as long hours and lack of exercise, it can result in obesity and lack of sleep, which can in turn influence occurrences of hypertension. Therefore, consideration of lack of sleep and obesity in their workers will be helpful for the management in the prevention of hypertension.

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Original Article

Comparison of Energy Nutrient and Fat Intake between the Hypertensive and Normotensive Male Workers: Yeon Jung Kim, Soo Geun Kim, Yun Mi Paek, Mi Kyung Kim; Korean Journal of Occupational and Environmental Medicine 2006;18(4):263-271. Published online December 31, 2006; DOI: https://doi.org/10.35371/kjoem.2006.18.4.263

Abstract PDF

OBJECTIVES
The purpose of this study was to investigate the difference in nutrient intake between normotensive workers and hypertensive workers to obtain basic data for developing a program of effective hypertension care at work.
METHODS
The subjects were 338 male workers. We measured physical data by medical examination and collected lifestyle data by questionnaire survey. Dietary intakes were collected using a food frequency questionnaire. We classified the subjects into normal, prehypertension, and hypertension groups, and compared the results of age, body mass index (BMI), blood pressure (BP), lifestyles and energy nutrients and lipids intake.
RESULTS
There were significant differences in both weight and BMI between the hypertension group and the other two groups (p<0.05). The smoking levels of the prehypertension group and hypertension group were significantly higher than that of the normal group (p<0.05). The three groups also showed significant differences in drinking amount (p<0.05). There were significant differences in carbohydrate and protein intakes and the ratio of carbohydrate, protein, and fat intake (p<0.05).
CONCLUSION
In this study, there was a significant difference in carbohydrate intake between normotensive and hypertensive workers, and the intake of energy nutrients and fatty acids in the prehypertension group and hypertension groups was unbalanced. Therefore, early diagnosis of workers with hypertension and prehypertension is necessary to improve lifestyles particularly food habit.

Citations

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Study on Nutrition Knowledge and Eating Habits of Male Employees in Seoul and Kyunggi Area
Ji-Hye Kim, Hyun-Jung Chung
Korean Journal of Food and Cookery Science.2012; 28(1): 57. CrossRef
Dietary and Lifestyle Factors Associated with Hypertension in Korean Adolescents -Based on 2005 Korean National Health and Nutrition Examination Survey-
Killye Kim, Sook Mee Son, Hye-Kyeong Kim
Korean Journal of Community Nutrition.2011; 16(4): 439. CrossRef

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Original Article

Distribution of Blood pressure and Current State of Life Style Modification on Male Workers in a Large Factory: Analysis According to JNC-6 Guideline: Seung Ho Jeon, Hye Eun Lee, Do Myung Paek, Yang Ho Kim, Jung Sun Park, Gang Won Park; Korean Journal of Occupational and Environmental Medicine 2003;15(4):364-372. Published online December 31, 2003; DOI: https://doi.org/10.35371/kjoem.2003.15.4.364

Abstract PDF: OBJECTIVES
To describe the distributions of blood pressure level and risk group, and the current state of life style modification in the population of a large factory.
METHODS
We surveyed 1,088 workers in a large factory from June 2002 to August 2002. Information related to hypertension was collected through a questionnaire and medical examination. We classified the blood pressure level and risk group using JNC-VI criteria, and the current state of life style modification and medication according to the blood pressure level in the entire study population. REULTS: The prevalence of hypertension was 30.1% in all workers. The distribution of blood pressure level was 656 (60.3%) in normal stage, 160 (14.7%) in high normal stage, 190 (17.5%) in stage 1, 67 (6.1%) in stage 2, and 15 (1.4%) in stage 3. The numbers of workers in risk groups A, B and C were 296 (27.2%), 690 (63.4%) and 102 (9.4%), respectively. Among all workers, 432 (39.7%) needed to modify their lifestyle; 106 of whom (24.5%) needed to go on hypertensive drug medication. Overweight subjects were more common in stage 2 than in other stages (p=0.02). The numbers of smokers and low-exercisers were signigicantly lower in the higher blood pressure group than the lower blood pressure group (p<0.01). Alcoholic drinking was evenly distributed in all blood pressure level.
CONCLUSION
The prevalence of hypertension was 30.1% in all workers. The most common stage of blood pressure level was normal, followed by stage 1, high normal stage, stage 2, stage 3. The number of subjects in risk group B was more than that in the other risk groups. We recommend total worker education and the practice of lifestyle modification.

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Original Article

Effectiveness and Factors Associated with the Control of Hypertension in Apartment Management Workers : Provided with Occupational Health Services: Soon Hwan Kang, Hyunjoo Kim, Youngkyu Kim, Jung Wan Koo; Korean Journal of Occupational and Environmental Medicine 2002;14(4):426-435. Published online December 31, 2002; DOI: https://doi.org/10.35371/kjoem.2002.14.4.426

Abstract PDF

OBJECTIVES
This study was conducted to investigate the effectiveness of the visiting occupational health services(OHS)and the factors associated with the proper control of blood pressure in hypertensive apartment management workers.
METHODS
The study group included 60 workers,who were visited and followed up regularly by a nurse for a period of more than 6 months.We checked the risk factors of hypertension, blood pressure and provided hypertension control methods every 2 months.
RESULTS
Mean systolic blood pressure decreased from 151.9 mmHg at the first visit to 141.1 mmHg at the last visit, and mean diastolic blood pressure also decreased from 93.6 mmHg to 87.1 mmHg (p<0.01).The number of workers who had regular exercise more than once a week increased from 7 (11.7%)at the first visit to 34 (56.7%)at the last visit, and the number of workers taking hypertensive medicines increased from 4 (6.7%) to 26 (43.3%)(p<0.01). The percentage of workers who either changed their life style or began taking hypertensive medication over the course of the action undertaken by the occupational health services showed a significant differences, 36.8%in the shorter intervention group, 43.5%in intermediate intervention group, and 72.2%in longer intervention group (p<0.05). Among those who were on shift work for less than 10 years was 32 (78.0%), while the corresponding number was only 9 (22.0%) for those who were on shift work for more than 10 years (p<0.01).
CONCLUSIONS
This study showed that the visiting OHS was effective in bringing about a reduction in blood pressure, as well as an improvement in life style habits and in the use of medication. It suggests that occupational factors should be taken into account for the proper control of blood pressure in hypertensive apartment management workers.

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Occupational accidents and human errors in apartment custodians’ work
Jun Sik Kim, Byung Yong Jeong
Work.2018; 60(4): 587. CrossRef
Occupational injuries and risk assessment of apartment guards work
Myoung Hwan Park, Byung Yong Jeong
Human Factors and Ergonomics in Manufacturing & Service Industries.2018; 28(4): 220. CrossRef
Risk Factor Evaluation of Musculoskeletal Symptoms for Guards
Kyung-Sun Lee, In-Seok Lee, Hyun-Joo Kim, KyungHee Jung-Choi, Jin-Wook Bahk, Myung-Chul Jung
Journal of the Ergonomics Society of Korea.2011; 30(3): 419. CrossRef

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Original Article

The Relationship between Cold-Exposure and Hypertension: Tae Won Jang, Yoon Gyu Kim, Dong Young Yoon, Chang Hee Lee, Young Seoub Hong, Hae Rim Shin, Kab Yeul Jung, Joon Youn Kim; Korean Journal of Occupational and Environmental Medicine 2001;13(4):376-384. Published online December 31, 2001; DOI: https://doi.org/10.35371/kjoem.2001.13.4.376

Abstract PDF

OBJECTIVES
This study was carried out to suggest preventive methods for hypertension in cold-exposed workers.
METHODS
In 11 refrigeration industries, 68 workers working in refrigerated areas more than one time per day were selected as the exposed group, and 68 workers not exposed to cold were selected as the control group. We interviewed the subjects with a questionnaire covering occupational history, and conducted clinical and laboratory tests including measurements of blood pressure and core temperature.
RESULTS
The systolic blood pressure in the exposed group(130.0+/-13.3 mmHg) was significantly higher than that recorded in the control group(118.3+/-12.1 mmHg), as was the diastolic blood pressure in the exposed group(82.7+/-8.5 mmHg) versus the control group(77.4 +/-8.7 mmHg). The core temperature in the exposed group(36.1+/-0 . 7degrees C) was significantly lower than that experienced in the control group(36.4+/-0 . 5degrees C). In logistic regression analysis, age, cold exposure severity and milk intake were significant variables, with odds ratios of 5.204(95 % CI 1.440~18.812), 2.674(95 % CI 1.080~6.618), and 0.364(95 % CI 0.141~0.942), respectively.
CONCLUSIONS
Our study suggests that cold-exposed workers have higher a higher risk of hypertension, and that their core temperature is lower. Risk factors affecting hypertension of cold-exposed workers include age, cold exposure severity and milk intake. For the prevention of hypertension, cold-exposed workers should minimize cold-exposure time as much as possible.

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Comparison of Changes in Physiological and Perceptual Indices of Cold Stress under Normal Clothing and Thermal Insulation Clothing among Automotive Service Workers in Isfahan
Fatemeh Naghdi, Zohreh Mohebian, Habibollah Dehghan
International Journal of Environmental Health Engineering.2023;[Epub] CrossRef

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Original Article

Determinants on Occurrence of Hypertension in the Korean Adult Male Workers in an Industry: a Nested Case-control Study: Noh Won Park, Il Suh, Tae Yong Lee, Sun Ha Jee, Se Ho Kim; Korean Journal of Occupational and Environmental Medicine 1999;11(4):505-515. Published online December 31, 1999; DOI: https://doi.org/10.35371/kjoem.1999.11.4.505

Abstract PDF: OBJECTIVES
In order to find determinants on occurrence of hypertension in the adult male workers in an industry, a nested case-control study was performed in Seoul, Korea at the periodic health examination center.
METHODS
A cohort was formed with 1,690 normotensive male workers in 1996 and 1997, who had participated in three consecutive periodic health examinations from 1996 through 1998. Cases were 89 hypertensives in 1998, controls were 356 selected by 1:4 age-matching among 1,601 normotensives in 1998. Baseline health behavior (drinking smoking, exercise), baseline health examination data (height, weight, BMI, blood pressure. hemoglobin, fasting blood sugar, serum total cholesterol), and the changes of data during the study period were compared between case and controls. And multiple logistic regression was performed to find determinants on occurrence of hypertension.
RESULTS
There was significant difference in alcohol consumption amount, baseline weight, DM1, blood pressure, total cholesterol, and hemoglobin level. The main determinants on occurrence of hypertension from multiple logistic regression analysis were baseline systolic blood pressure (OR, 1. 13; 95% confidence interval 1.08-1.18%), 15-21 drinks per week (OR, 4.17; 95 % confidence interval 1.44-12.11), and 22 or more drinks per week (OR, 5.29; 95 % confidence interval 1.50-18.58).
CONCLUSIONS
This study showed the importance of baseline blood pressure level and adequate drinking habit for the management of hypertension.

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