中华劳动卫生职业病杂志最新文献

{"title":"[Analysis of influencing factors on the use of personal protective equipment by noise workers].","authors":"J Y Lu, Z Zhang, Y H Wang, S B Su, H Chen, M Liu, X D Li","doi":"10.3760/cma.j.cn121094-20240326-00123","DOIUrl":"https://doi.org/10.3760/cma.j.cn121094-20240326-00123","url":null,"abstract":"<p><p><b>Objective:</b> To analyze the correct use of personal protective equipment (PPE) among noise-exposed workers and its influencing factors, providing reference information for noise intervention efforts. <b>Methods:</b> In September 2023, a stratified sampling method was employed. Based on the 2022 gross domestic product (GDP) rankings of cities in Guangdong Province, 21 prefecture-level cities were divided into economically developed and less developed groups. Two cities were randomly selected from each group, and 16 to 17 enterprises were randomly chosen from each city as study sites. Twenty workers were included from each enterprise as study subjects. A total of 1200 questionnaires were distributed and collected, and 1099 were valid, with an effective recovery rate of 91.6%. The correctness of hearing protector usage was evaluated according to the GB/T 23466-2009 \"Guidelines for the Selection of Hearing Protectors\", and the personal attenuation rating values of the workers' hearing protectors were measured. A self-designed Questionnaire on the Use of Hearing Protectors by Noise-Exposed Workers was used to investigate PPE-related usage. Multivariate logistic regression analysis was conducted to identify factors influencing the correct use of PPE. <b>Results:</b> A total of 429 (39.0%) noise-exposed workers were able to use PPE correctly during work. Multivariate logistic regression analysis showed that age, working hours, gender, occupational noise protection knowledge score, whether PPE was checked after use, and the frequency of peer supervision on PPE usage were significant factors influencing the effective use of PPE (<i>P</i><0.05) . <b>Conclusion:</b> The correct use of PPE by noise-exposed workers still needs to be improved. The level of occupational health education in enterprises should be enhanced to promote the correct use of PPE by noise-exposed workers.</p>","PeriodicalId":23958,"journal":{"name":"中华劳动卫生职业病杂志","volume":"43 3","pages":"196-200"},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Epidemiological investigation and analysis of occupational injuries of workers in metallurgical and shipbuilding and repairing industry].","authors":"X Luo, Z P Li, Y Y Zhang, D Wang, W J Hu, J N Zheng, S B Su","doi":"10.3760/cma.j.cn121094-20240329-00131","DOIUrl":"https://doi.org/10.3760/cma.j.cn121094-20240329-00131","url":null,"abstract":"<p><p><b>Objective:</b> To understand the occupational injury situation of front-line workers in metallurgical and shipbuilding and repairing industry, and explore the risk factors of occupational injury. <b>Methods:</b> From September 2023 to March 2024, using cluster sampling method, front-line workers from 2 metallurgical enterprises in Shaoguan and Jinan City and 2 shipbuilding and repairing enterprises in Jiangmen and Shenzhen City were selected as the investigation objects. 6248 questionnaires were distributed and collected, and 6178 were effective questionnaires, with a effective recovery rate of 98.88%. The basic information, living habits, working system, protection and occupational injury of workers were investigated, and the data of occupational injury in factories was collected. The types, jobs and main causes of occupational injuries in different industries were analyzed, and the influencing factors of occupational injuries were analyzed by univariate and multi-factor logistic regression. <b>Results:</b> The incidence of occupational injury was 3.13% (128/4086) in metallurgical industry and 4.02% (84/2092) in shipbuilding and repairing industry. The top three occupational injuries in the metallurgical industry were furnace worker (17.19%, 22/128), steel rolling worker (14.84%, 19/128), maintenance worker (10.16%, 13/128), and the top three injury types were mechanical injury (24.22%, 31/128), height fall (20.31%, 26/128) and object strikes (17.97%, 23/128). The top three occupational injuries in shipbuilding and repairing industry were welder (20.24%, 17/84), riveter (9.52%, 8/84) and crane (8.33%, 7/84). The top three injury types were hit by objects (34.52%, 29/84), hit by falling objects (22.62%, 19/84), and lifting injury (20.24%, 17/84). The injuries of workers in metallurgical industry and shipbuilding and repairing industry were mainly fractures, accounting for 32.03% (41/128) and 60.71% (51/84), respectively. The incidence of occupational injury was higher in males, with sleep disorder, high temperature exposure and chemical toxicity exposure (<i>P</i><0.05). There were significant differences in age, smoking degree, working age and emotional state between workers with occupational injury and those without occupational injury (<i>P</i><0.05). Multivariate analysis showed that male, age above 50 years old, moderate smoking, working years of 5-9 years, mild anxiety, poor health status and high temperature exposure were risk factors for occupational injury (<i>OR</i>=25.57, 3.72, 14.27, 2.09, 1.50, 4.36, 0.66, <i>P</i><0.05) . <b>Conclusion:</b> The incidence of occupational injury is higher in shipbuilding and repairing industry, and fracture is the main type of occupational injury. The occurrence of occupational injury is affected by gender, age, smoking, working age, emotional state, health status and high temperature exposure.</p>","PeriodicalId":23958,"journal":{"name":"中华劳动卫生职业病杂志","volume":"43 3","pages":"201-205"},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Estimation model of individual noise exposure dose based on spatial distribution of workplace noise level].","authors":"L Hu, Y W Wang","doi":"10.3760/cma.j.cn121094-20240422-00176","DOIUrl":"https://doi.org/10.3760/cma.j.cn121094-20240422-00176","url":null,"abstract":"<p><p><b>Objective:</b> To develop an individual noise exposure dose estimation model based on spatial distribution of noise in order to provide reference for occupational health management and hearing loss risk assessment caused by noise in workplace. <b>Methods:</b> From July 2018 to October 2019, 10 noise-exposed positions and 48 employees in 3 high-noise workplaces of a manufacturing enterprise in Sichuan Province were selected as the research objects. Occupational health survey, fixed-point measurement of workplace noise and individual noise measurement were used to obtain noise intensity and employee exposure information. The mean noise intensity and the corresponding exposure time were weighted to estimate the individual noise exposure dose estimation model based on the spatial distribution of workplace noise, and the paired <i>t-</i>test was used to evaluate the accuracy of the individual noise exposure dose estimate (8 h equivalent sound level, L(EX, 8h)) based on the spatial distribution of workplace noise and the measured value of individual noise exposure dose. And the least square regression model was used to correct it. <b>Results:</b> The daily noise exposure dose of 44 (91.7%) of 48 workers in 10 types of work in 3 sites of the manufacturing enterprise exceeded the standard, and the maximum noise exposure intensity was up to 108.3 dB (A). The measured value of individual noise exposure dose was higher than L(EX, 8h), and the difference was statistically significant (<i>P</i><0.001). The noise difference distribution was mostly positive and symmetrical (<i>P</i>=0.958). The measured noise exposure dose of 6 out of 10 work types in 3 sites was higher than L(EX, 8h) (all <i>P</i><0.05), and there was a linear correlation between the measured dose and L(EX, 8h) (<i>r</i>=0.373, <i>P</i><0.05). Considering the influence of systematic error and the construction, diagnosis and screening of adaptive assessment model, an individual noise exposure dose estimation model based on the spatial distribution of workplace noise was finally obtained: <i>y</i>=0.574<i>x</i>+45.250, where <i>y</i> was the measured value of individual noise exposure dose, <i>x</i> was L(EX, 8h) value. <b>Conclusion:</b> The high noise hazard in manufacturing industry is more serious, and the noise exposure assessment of single fixed-point detection is relatively rough. The individual noise exposure dose estimation model based on the spatial distribution of workplace noise has a certain role in the occupational health management of workplace noise hazard in manufacturing industry.</p>","PeriodicalId":23958,"journal":{"name":"中华劳动卫生职业病杂志","volume":"43 3","pages":"175-179"},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[The role of endoplasmic reticulum IP(3)R calcium channel in vitamin E succinate induced autophagy of human gastric cancer cell].","authors":"X Y Wen, M M Cao, Z Y Zhang, N Xie, Z Y Wei, L Y Hou","doi":"10.3760/cma.j.cn121094-20240125-00037","DOIUrl":"https://doi.org/10.3760/cma.j.cn121094-20240125-00037","url":null,"abstract":"&lt;p&gt;&lt;p&gt;&lt;b&gt;Objective:&lt;/b&gt; To investigate the role of vitamin E succinate (VES) in inducing autophagy of human gastric cancer cells by activating calcium redistribution through inositol 1, 4, 5-trisphosphate receptors (IP(3)R) pathway. &lt;b&gt;Methods:&lt;/b&gt; Human gastric cancer lines MKN28 (moderately differentiated) and MKN45 (poorly differentiated) cells were cultured in vitro in March 2022. Gastric cancer cells were treated with VES at different doses for 24 h, and cell viability was measured by CCK-8 method to determine VES dose for subsequent study. The experiment was set up with solvent control group (0.1% ethanol), VES dose groups, 100 nmol/L rapamycin (RAPA) as autophagy positive control group (RAPA group), 15 μg/ml tunicamycin (TM) was used as the endoplasmic reticulum stress (ERS) positive control group (TM group), 10 μmol/ml 2-aminoethyl diphenylborinate (2-APB group) was used to inhibit IP(3)R (2-APB group) and VES+2-APB group. The occurrence of autophagosomes in gastric cancer cells was observed by transmission electron microscopy, and microtubule associated protein 1 light chain 3 (LC3), Beclin1, IP(3)R, glucose-regulated protein 75 (Grp75), voltage-dependent anion channel 1 (VDAC1) protein expression was detected by western blotting. Fluo-4 AM was used to label intracellular calcium ions, Rhod-2 AM was used to label mitochondrial calcium ions, and the fluorescence intensity of calcium ions was observed by fluorescence microscope. One-way analysis of variance was used to compare the means among multiple groups, and LSD-&lt;i&gt;t&lt;/i&gt; method was used for pairwise comparison. &lt;b&gt;Results:&lt;/b&gt; CCK-8 results showed that compared with solvent control group, the proliferation rates of MKN28 cells in 10-100 μg/ml VES group and MKN45 cells in 20-100 μg/ml VES group were significantly decreased (&lt;i&gt;P&lt;/i&gt;&lt;0.05). Subsequent VES dosages were determined according to the growth curve, MKN28 was 5, 10, 20, 40 μg/ml, and MKN45 was 10, 20, 40, 80 μg/ml. The results of transmission electron microscopy and fluorescence showed that autophagosomes were formed in MKN28 cells in 5 and 20 μg/ml VES groups and MKN45 cells in 10 and 40 μg/ml VES groups, and the fluorescence intensity of calcium ions in cytoplasm and mitochondria was significantly higher than that in solvent control group (&lt;i&gt;P&lt;/i&gt;&lt;0.05). Compared with solvent control group, LC3, Beclin1, IP(3)R, Grp75 and VDAC1 protein expressions of MKN28 cells in 20 and 40 μg/ml VES groups and MKN45 cells in 40 and 80 μg/ml VES groups were significantly increased (&lt;i&gt;P&lt;/i&gt;&lt;0.05). After inhibiting IP(3)R with 2-APB, the expression levels of IP(3)R, Grp75 and VDAC1 in two kinds of gastric cancer cells in VES+2-APB group were significantly decreased compared with VES group (&lt;i&gt;P&lt;/i&gt;&lt;0.05). The fluorescence results showed that the fluorescence intensity of cytoplasmic and mitochondrial calcium ions in VES+2-APB groups was significantly lower than that in VES group (&lt;i&gt;P&lt;/i&gt;&lt;0.05). Compared with VES group, LC3 and Beclin1 prot","PeriodicalId":23958,"journal":{"name":"中华劳动卫生职业病杂志","volume":"43 3","pages":"180-188"},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Analysis of one-year inpatient service utilization and influencing factors of pneumoconiosis patients in Chongqing].","authors":"H J Shi, L Bai, S Zhou, X H Yang, T T Yang, D Luo","doi":"10.3760/cma.j.cn121094-20240731-00359","DOIUrl":"https://doi.org/10.3760/cma.j.cn121094-20240731-00359","url":null,"abstract":"<p><p><b>Objective:</b> To investigate the utilization of inpatient service and influencing factors among pneumoconiosis patients in Chongqing within one year, and to provide a reference basis for the formulation of relevant policies by health management departments. <b>Methods:</b> From October 2020 to October 2023, a multi-stage cluster random sampling method was adopted to select 2002 patients with confirmed pneumoconiosis as the research subjects. A questionnaire survey was conducted on their basic information, inpatient service utilization within one year, treatment for pneumoconiosis-related symptoms, and choice of medical service institutions. Chi-square test and logistic regression were used for statistical analysis. <b>Results:</b> All 2002 pneumoconiosis patients were male, with 40.16% (804/2002) aged 46-55 years old, and 83.32% (1668/2002) currently residing in rural areas. The monthly income of the patients was 833 (167, 2000) yuan, and 22.03% (441/2002) had no income. 30.97% (620/2002) of the patients spent more than 5001 yuan per year on treatment for pneumoconiosis, and 14.64% (293/2002) had debts of more than 5001 yuan. 42.06% (842/2002) had no work-related injury insurance. 21.68% (434/2002) of the patients self-assessed their health status as very poor or poor. The one-year inpatient rate of the patients was 51.25% (1026/2002), and the total inpatient time within one year was 18 (10, 51) days. The inpatient expenses were 6000 (1000, 16625) yuan. Through univariate analysis, the one-year inpatient rates of pneumoconiosis patients were statistically significantly different among different age groups, current employment status, annual household income levels, types of pneumoconiosis, stages of pneumoconiosis, presence or absence of work-related injury insurance, whether receiving minimum living allowances and social assistance related to pneumoconiosis, and different segments of self-assessed health status (<i>P</i><0.05). Patients with stage Ⅲ pneumoconiosis, those who received social assistance and minimum living allowances related to pneumoconiosis had higher one-year inpatient rates (<i>P</i><0.05), with <i>OR</i> values of 3.893, 1.859, and 2.589, respectively. <b>Conclusion:</b> The utilization of inpatient service by pneumoconiosis patients is influenced by demographic characteristics, social support, and disease factors. It is necessary to enhance the occupational disease diagnosis and treatment capabilities of primary health institutions, build a multi-level social support network, and ensure that patients can conveniently access medical services.</p>","PeriodicalId":23958,"journal":{"name":"中华劳动卫生职业病杂志","volume":"43 3","pages":"217-223"},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Analysis of the use of personal protective equipment and its influencing factors in the dust working population].","authors":"Z Zhang, J Y Lu, Y H Han, Y H Wang, S B Su, X D Li","doi":"10.3760/cma.j.cn121094-20240422-00182","DOIUrl":"https://doi.org/10.3760/cma.j.cn121094-20240422-00182","url":null,"abstract":"<p><p><b>Objective:</b> To observe the current status of the use of personal protective equipment (PPE) by the dust working population, and to analyze the factors affecting its use, so as to provide a reference basis for proposing scientific intervention methods. <b>Methods:</b> From October to December 2023, random sampling method was used to conduct a self-designed Questionnaire on the Use of Personal Protective Equipment by the Dust Working Population. A total of 1216 dust workers were randomly selected from each city in Guangdong Province, and their mask wearing status was evaluated. The Wilcoxon rank sum test was used for comparison between measurement data sets, and the Chi-square test or Fisher exact probability method was used for counting data. A binary logistic regression model was used to analyze the factors affecting the use of PPE in dust workers. <b>Results:</b> The correct rate of wearing PPE in dust working group was 66.12% (804/1216). In univariate analysis, there were statistical significances in different knowledge score, wearing PPE to reduce exposure to dust particles, wearing occupational health protective equipment such as masks was uncomfortable, wearing occupational health protective equipment such as masks reduced work efficiency, attending pre-employment occupational health examination, attending occupational health examination on a regular basis, receiving occupational health training during work in the enterprise, being urged or reminded by workmates, supervisors, or family members to use PPE, the correct use of PPE when workers or shift leaders were exposed to dust particles, second-hand smoke inhalation, smoking, and alcohol consumption (<i>P</i><0.05). Multiple logistic regression results showed that gender (<i>OR</i>=2.00, 95%<i>CI</i>: 1.48-2.72), knowledge score (<i>OR</i>=1.18, 95% <i>CI</i>: 1.11-1.26), neutral attitude towards the discomfort of wearing occupational health protective equipment such as masks during work (<i>OR</i>=1.64, 95%<i>CI</i>: 1.18-2.27), and participation in pre-job occupational health examination (<i>OR</i>=0.23, 95%<i>CI</i>: 0.10-0.54) were the main influencing factors on the use of PPE to be worn correctly (<i>P</i><0.05) . <b>Conclusion:</b> The rate of correct wearing of PPE for dust working population still needs to be improved. Factors such as gender, knowledge score, neutral attitude towards the discomfort of wearing masks during work, and participation in pre-job occupational health examination may be the influencing factors on the use of PPE for dust working population.</p>","PeriodicalId":23958,"journal":{"name":"中华劳动卫生职业病杂志","volume":"43 3","pages":"189-195"},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Study on the field protective effect of respiratory protective equipment for occupational population].","authors":"S B Su","doi":"10.3760/cma.j.cn121094-20250121-00034","DOIUrl":"https://doi.org/10.3760/cma.j.cn121094-20250121-00034","url":null,"abstract":"","PeriodicalId":23958,"journal":{"name":"中华劳动卫生职业病杂志","volume":"43 3","pages":"161-163"},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[One case of VAV-ECMO treatment of a patient with severe cardiopulmonary insufficiency caused by inhalation of dilute nitric acid liquid and aerosol].","authors":"X Yin, C Pan, J Dai","doi":"10.3760/cma.j.cn121094-20240313-00097","DOIUrl":"https://doi.org/10.3760/cma.j.cn121094-20240313-00097","url":null,"abstract":"<p><p>This article analyzed the use of veno-arterio-venous extracorporeal membrane oxygenation (VAV-ECMO) in the treatment of a patient with severe cardiopulmonary insufficiency caused by inhalation of dilute nitric acid liquid and aerosol. Combined with relevant literature, the pathogenesis was discussed and the treatment experience was summarized. The inhalation of a large amount of dilute nitric acid liquid and aerosol caused severe chemical pneumonia in the patient, which resulted in severe cardiac insufficiency due to the dysregulation of the ventricular artery coupling. After the administration of VAV-ECMO, the well-oxygenated blood was effectively supplied to the systemic circulation and pulmonary circulation, and the load of the heart was reduced, providing valuable time for the recovery of the patient's cardiopulmonary function.</p>","PeriodicalId":23958,"journal":{"name":"中华劳动卫生职业病杂志","volume":"43 3","pages":"232-236"},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[A study of the intervention effect of nose pads and elastic adjustment clasps on the fit of KN95 masks].","authors":"Y Y Zhang, Q F Huang, X T Su, X Zhong, Z P Li, X Luo, S B Su","doi":"10.3760/cma.j.cn121094-20240520-00227","DOIUrl":"https://doi.org/10.3760/cma.j.cn121094-20240520-00227","url":null,"abstract":"<p><p><b>Objective:</b> To investigate the fit of dust-exposed workers wearing KN95 masks in a city of Guangdong Province, and to discuss the intervention effect of nose pads and elastic adjustment clasps on the fit of KN95 masks. <b>Methods:</b> In January 2024, 145 dust-exposed workers from a stone processing enterprise in a city of Guangdong Province were selected as study subjects by convenience sampling, and 4 types of KN95 masks commonly used by dust-exposed workers were selected as test masks. The head and face dimensions of the study subjects were measured using a right-angle gauge and a curved-angle gauge, and the fit factor (FF) of the KN95 masks was tested using the quantitative fit test for respiratory protective equipment, and the intervention of adding nose pads or elastic adjustment clasps was given to those who failed the first fit test. The paired <i>t</i>-test was used to compare the changes of workers' FF before and after the intervention. <b>Results:</b> The coverage rate of the study population in the facial subsection of the Chinese Han population was 71.0% (103/145). Before intervention, the overall passing rate of the fit test of 4 types of KN95 masks was 16.6% (24/145), and the passing rate of 4 types of masks had statistical significance (<i>χ</i>(2)=19.73, <i>P</i><0.001). After intervention, the overall passing rate of the fit test of masks was 33.9% (41/121), and the geometric mean of the total FF after intervention increased from 15.9 to 62.7 (<i>t</i>=-13.53, <i>P</i><0.001), among which 88.4% (107/121) workers' FF improved after intervention, and 11.6% (14/121) of workers had reduced FF. <b>Conclusion:</b> Dust-exposed workers in a city of Guangdong Province have a low coverage rate of facial subsection among Chinese Han population, and the passing rate of KN95 mask fit test is low. Interventions using additional nose pads or elastic adjustment clasps can partially improve the fit of the mask, and it is still necessary to continue to explore interventions to improve the fit of mask wearers.</p>","PeriodicalId":23958,"journal":{"name":"中华劳动卫生职业病杂志","volume":"43 3","pages":"164-169"},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Study on influencing factors of lung function injury in workers exposed to carbon industry in a city].","authors":"X C Sun, H Shao, N Li, P Han, T Wang, F J Song, D H Su, F Cui","doi":"10.3760/cma.j.cn121094-20240122-00031","DOIUrl":"https://doi.org/10.3760/cma.j.cn121094-20240122-00031","url":null,"abstract":"<p><p><b>Objective:</b> To investigate the influential factors of lung function injury in occupational exposure workers in carbon industry. <b>Methods:</b> In January 2024, a judgment sampling method was employed, with 230 occupational exposure workers in the carbon industry as the study subjects. They were divided into abnormal group and normal group according to whether there was lung function injury in occupational health examination. The basic information of workers in carbon industry was collected by questionnaire, their lung function was measured, urine and blood samples were collected after work, and 1-hydroxypyrene, 1-hydroxynaphthalene and 2-hydroxynaphthalene concentrations and the percentage of DNA in the comet tail and Olive tail distance in peripheral blood lymphocytes were determined. The differences in indicators of lung function, urine and blood samples between the two groups were compared by Mann-Whitney test and <i>t-</i>test. The influencing factors of lung function injury were analyzed by logistic regression. <b>Results:</b> The forced vital capacity (FVC) %[88% (86%, 92%) ], forced expiratory volume in the first second (FEV(1)) %[92% (88%, 95%) ] and FEV(1.0)/FVC%[96% (91%, 102%) ] of occupational exposure workers in the carbon industry in the normal lung function group (<i>n</i>=118) were significantly higher than those in the abnormal lung function group [<i>n</i>=112, 83% (80%, 87%), 84% (80%, 88%), 86% (79%, 91%) ], the differences were statistically significant (<i>P</i><0.05). 1-Hydroxypyrene[9.28 (2.96, 25.94) μg/g], 1-hydroxynaphthalene[2.48 (1.47, 4.37) μg/g], percentage of DNA in the comet tail [11.83% (5.30%, 21.45%) ] and Olive tail distance [2.30 (0.82, 4.77) μm] in the abnormal lung function workers was significantly higher than those in the normal group[2.57 (1.17, 9.34) μg/g, 1.70 (0.94, 2.89) μg/g, 6.75% (2.55%, 12.60%), 1.25 (0.43, 2.34) μm], and the differences were statistically significant (<i>P</i><0.05). Logistic regression analysis showed that sex, working age, job type, percentage of comet tail DNA in peripheral blood, Olive tail distance and 1-hydroxypyrene were all factors influencing lung function injury in occupational exposure workers in carbon industry (<i>P</i><0.05) . <b>Conclusion:</b> The percentage of DNA in the comet tail, Olive tail distance in peripheral blood lymphocytes and 1-hydroxypyrene may be markers of lung function injury in workers exposed to carbon industry. Working age and job type are occupational factors affecting lung function injury. Occupational protection should be strengthened and a reasonable operating system should be established to ensure the health of occupational workers.</p>","PeriodicalId":23958,"journal":{"name":"中华劳动卫生职业病杂志","volume":"43 3","pages":"224-227"},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}