Literature analysis of hot topics on occupational noise-induced hearing loss / 中华劳动卫生职业病杂志

Objective: To analyze the literature of related research reports on occupational hearing loss (ONIHL) , study the characteristics of the subject and determine the research hotspots. Methods: In December 2020, PubMed database was searched by bibliometrics for ONIHL published in PubMed database from January 1971 to December 2020. Bicomb 2.03 software was used to extract the subject. The publication year, publication country, source magazine and subject words were summarized and analyzed. Results: A total of 1 473 papers were included in this study, and the number of papers was 66 from 1971 to 1980, and 628 from 2011 to 2020, an increase of nearly 10 times. The top three countries were the United States, China and Germany, with 31.5% (464/1473) , 11.5% (171/1473) and 6.2% (91/1473) ; The cross-sectional study was the most applied type; The top five words for 2011-2020: Mental Illness, polymorphism, cardiovascular disease, high frequency hearing impairment and standards and regulations. Conclusion: Susceptibility Genes, Psychological Disorders, Cardiovascular Diseases and Risk Assessment are hot areas in ONIHL at present. Researchers should focus on major fields and grasp future trends as a whole.

The influence of subjective comfort of working environment on occupational stress of railway station workers / 中华劳动卫生职业病杂志

Objective: To explore the influential factors of job stress suffered by workers in railway stations, the level of job stress of were measured and subjective comfort of employees targeting to working environment were reported. Methods: In March 2019, a cluster sampling study was designed to collect the personal characteristics, job characteristics and subjective comfort degree of working environment of 432 employees in Chongqing railway stations. Meanwhile, job stress was assessed using the effort-reward imbalance scale. Chi-square test was used to compare the difference of occupational stress detection rate among different stratified factors such as occupational characteristics. Logistic regression was applied to analyze the influential factors of occupational stress. Results: The detection rate of job stress of workers in the railway stations was 31.02% (134/432) . The detection rate of job stress was higher among the divorced workers in railway stations, those earning less than 5, 000 yuan per month, those with 10-20 years' length of service, those who worked as a conductor and other workers including baggageman, station master on duty and assistant engineer (χ(2)=9.61, 14.76, 23.28, 11.06, P=0.008, 0.002, 0.000, 0.011) . The detection rate of job stress was higher among those whose working environment subjective feelings were uncomfortable, the differences were statistically significant (P<0.001) . The results showed that the occupational stress of the staff in the railway stations was influenced by their subjective feeling of air quality, noise and Space Layout (P<0.05) . The risk factors of occupational stress were air quality, noise and uncomfortable space layout (OR=0.571, 0.068, 0.441, P=0.051, 0.054, 0.007) . Conductor, other (Bellboy, Duty Station Master, assistant engineer) were the risk factors of occupational stress (OR=1.884, 2.703, P=0.065, 0.019) . The employees of station A and station B were the risk factors of occupational stress (OR=4.681, 1.811, P=0.002, 0.067) . Conclusion: The higher detection rate of job stress of workers in the railway stations is correlated with the subjective comfort degree of the working environment of the workers.

Activity of serum superoxidein in patient with thyroid associate diseases / 中国现代普通外科进展

Objective:To study the activity of superoxide dismutase (dismutase superoxide,SOD) in peripheral blood of patients with thyroid associated diseases.Methods:84 cases of patients with thyroid cancer,21 cases of patients with nodular goiter,75 cases of patients with hyperthyroidism,56 cases of patients with hypothyroidism and 63 cases of normal control were collected,serum enzyme activity of SOD was detected by enzyme method,FT3,FT4 and TSH levels were detected by electrochemiluminescence assay.Student-t,Mann-whitney-U or Kruskal-Wallis was applied to analyse the different of SOD activity in different groups.Pearson correlation analysis were applied to analyze the correlation of SOD activity with thyroid hormone levels.Results:SOD activity in thyroid cancer group (164.536 ± 18.095) U/ml was significantly lower than that in hyperthyroidism group (173.376 ± 15.942) U/ml,hypothyroidism group (174.827 ± 19.895) U/ml and normal control group(179.529 ±11.625) U/ml(P＜0.05),SOD activity in nodular goiter group(157.667 ± 15.189) U/ml was significantly lower than that in hyperthyroidism group (173.376 ± 15.942) U/ml,hypothyroidism group (174.827 ± 19.895) U/ml and normal controls (179.529 ± 11.625) U/ml (P＜0.05).There were positive correlation of FT3,FT4 levels respectively with SOD activity in thyroid cancer group(r=0.346 P＜0.05,r=0.3278,P＜0.05),and there was positive correlation of FT3 level with SOD activity in normal control group (r=-0.5522.P＜0.05).Conclusions:SOD activity decreased in nodular goiter and thyroid cancer,so it could be used to observe the damage of thyroid tissue.Furtherly,it might be used as an auxiliary index in the diagnosis of thyroid tumors.