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Objective: To analyze the current status of work-related musculoskeletal disorders (WMSDs), work fatigue and musculoskeletal pain in Chinese occupational population, and to study the relationship between work fatigue and musculoskeletal pain and WMSDs. Methods: A total of 66 961 employees from 323 enterprises in 15 key industries in China were selected as the study subjects using stratified cluster sampling method. The incidence of WMSDs in the past year was investigated using the Chinese version of the Musculoskeletal Disorders Questionnaire, and the work fatigue and musculoskeletal pain were investigated using Borg 6-20 Rating of Perceived Exertion Scale and visual analogue scale. The data were standardized using the age composition data of 18 to 60 years from the seventh national population census. Results: The standardized annual incidence of WMSDs was higher in the front-line workers than that in the administrative and other supportive staff (38.82% vs 36.30%). The detection rates of work fatigue and musculoskeletal pain in the study subjects were 44.54% and 63.08%, respectively. The result of S-curve fitting showed that the risk of WMSDs increased with the level of work fatigue (P<0.01). Among the front-line workers, the average of monthly fatigue frequency in the neck, shoulder, lower back, upper back, wrist/hand, foot and ankle, knee, leg, and elbow were higher in the group with WMSDs compared to those without WMSDs (all P<0.01). The pain degree of musculoskeletal pain was higher in all nine sites in the fatigued group than in the no-fatigue group (all P<0.01). The standardized detection rate of musculoskeletal pain was higher in the fatigued group than in the non-fatigued group (80.38% vs 25.71%). The work fatigue was moderate and positively correlated with musculoskeletal pain in all seven sites except the lower back and elbow, with Kendall Tau-b correlation coefficients ranging from 0.423 to 0.546 (all P<0.01). Conclusion: There is a good correlation between work fatigue and local musculoskeletal pain, work fatigue and WMSDs in Chinese occupational population. Implementing ergonomic interventions to control the development of work fatigue can be an effective measure for preventing WMSDs.
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Background Prolonged awkward postures during occupational activities can lead to excessive musculoskeletal load on the wrist of workers and symptoms such as wrist pain or discomfort. Objective To survey the prevalence of wrist pain among workers in 10 key industries and analyze its correlation with wrist working postures. Methods By using stratified cluster sampling method, workers from 10 key industries, such as footwear manufacturing industry, shipbuilding manufacturing industry, and automobile manufacturing industry, were selected from seven regions in North China, East China, Central China, South China, Southwest China, Northwest China, and Northeast China. The demographic information, wrist working postures, pain in wrist of the workers were collected through a cross-sectional survey. Pearson χ2 test was used to compare prevalence by selected factors, trend χ2 test for between group comparison, and unconditional logistic regression models for the association of wrist working postures with wrist pain. Results There were 64052 workers enrolled in this survey, and 56286 provided valid questionnaires (the effective rate was 87.8%). According to the survey, the prevalence of wrist pain was 23.3% (13112/56286), and the industries with higher prevalences were footwear manufacturing (27.1%, 1927/7106), automobile manufacturing (24.9%, 5378/21560), and shipbuilding and related equipment manufacturing (24.4%, 850/3488) industries. Finger pinching (OR=2.09, 95%CI: 1.95-2.24), frequent wrist bending (OR=2.03, 95%CI: 1.92-2.15), fixed wrist bending (OR=1.77, 95%CI: 1.69-1.85), wrist on hard edge (OR=1.34, 95%CI: 1.28-1.40), and arms over shoulders (OR=1.11, 95%CI: 1.05-1.17) increased the risk of reporting wrist pain. Conclusion Awkward postures are related to wrist pain among workers in selected 10 key industries. The related factors are wrist on hard edge, frequent wrist bending, finger pinching, fixed wrist bending, and arms over shoulders.
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Objective:To evaluate and analyze elderly health on the physical, psychological and social dimensions, so as to understand the health status and care needs of community-dwelling elderly residents.Methods:A cross-sectional study was carried out in the Meiyuan community, Malianwa Street, Haidian District of Beijing during July 22 to August 26, 2021.A total of 404 people aged 60 and above(70.6±8.6 years old)including 169 men and 235 women were enrolled through cluster sampling.All information about community-dwelling elderly residents was collected with face-to-face interviews and a standardized structured questionnaire for the evaluation and analysis of their physical, mental, social and overall health.Results:The rate of overall healthy residents was 21.3%(86), and the rates of physically, mentally and socially healthy residents were 66.8%(270), 86.6%(350) and 24.3%(98), respectively, in this community.There was a sex difference in social health in the whole group( χ2=9.008, P=0.011)and a higher proportion of men than women were considered generally healthy( χ2=8.963, P=0.003). People in the three age groups(224 in the 60-69 group, 109 in the 70-79 group and 71 in the ≥80 group)showed statistically significant differences in overall, physical, mental and social health( χ2=18.473, 61.186, 43.026 and 18.310, P<0.001), which declined with increasing age( χ2=13.172, 23.515, 26.806 and 10.068, P<0.001 or 0.01). Conclusions:s The overall healthy rate is not high among community-dwelling elderly residents in Beijing.The health status of the elderly gradually deteriorates with age.Health assessment for the elderly should be emphasized and targeted health education and prevention should be provided to promote disease prevention and mental health.
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Objective:To analyze the early risk warning factors of clinical characteristics in children with acute lymphoblastic leukemia (ALL) complicated with acute pancreatitis (AP).Methods:Retrospective study.A total of 39 children with ALL complicated with AP admitted to the Hematology Center of Beijing Children′s Hospital, Capi-tal Medical University from May 2018 to December 2020 were selected as the case group, and 78 ALL patients were randomly selected as the control group according to the exact matching of 1∶2 of the same age and sex.The measurment data and counting data were analyzed by Rank sum test ( Mann Whitney U test) and χ2 test between the 2 groups, respectively, and further multivariate Logistic regression analysis was performed to find out the risk factors of ALL complicated with pancreatitis.At the same time, the relationship between each index and severity was explored. Results:The incidence of ALL complicated with AP was 8.55% (39/456 cases). The high incidence age was 3-10 years old.Sixty-four point nine percent (24/37 cases) of the pancreatitis occurred in the early stage of chemotherapy, and 66.7% (26/39 cases) was associated with asparaginase.There were significant differences in ALL risk stratification ( χ2=21.404, P<0.001), C-reactive protein (CRP)( U=232.000, P<0.001), procalcitonin (PCT)( t=3.950, P<0.001), hematocrit( t=3.981, P<0.001), serum calcium( t=-9.609, P<0.001), indirect bilirubin( U=1 142.000, P<0.05), triglyceride( t=3.600, P=0.001) and albumin( t=-6.296, P<0.001) between the 2 groups.The sensitivity of abdominal CT, abdominal ultrasound and pancreatic magnetic resonance imaging in the case group were 70.8%, 81.6% and 100.0%, respectively.Multivariate Logistic regression analysis showed that differences between albumin( OR=11.444, 95% CI: 3.240-40.423), triglyceride( OR=18.047, 95% CI: 5.020-65.074) and risk stra-tification( OR=8.894, 95% CI: 1.889-41.885) were statistically significant, and there were obvious differences in PCT( U=3.000, 2.000, all P<0.05) and serum calcium( U=4.500, 8.500, all P<0.05) between patients with severe pancreatitis and patients with mild or moderate severe pancreatitis. Conclusions:ALL complicated with AP often occurs in the early stage of chemotherapy, mainly caused by asparaginase.In imaging examination, the sensitivity of pancreatic magnetic resonance imaging is the highest, followed by abdominal ultrasound.Risk stratification, decreased albumin and elevated triglyceride are risk factors of ALL complicated with AP, which are helpful for early identification of high-risk patients with ALL complicated with AP.PCT and serum calcium may play an important role in severe pancreatitis.
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Objective To investigate the health status of high-radon exposure miners in a typical non-uranium mine in Jiangxi Province, China. Methods A general survey was conducted to investigate the basic situation and awareness rate of radon among underground miners aged ≥ 40 years, and the occupational health examination and low-dose lung computed tomography scan were carried out. Results The awareness rate of radon among miners working down the mine was only 3.70%. The peripheral blood lymphocyte chromosome aberration analysis showed an aberration rate of 0% per 100 cells. The peripheral blood lymphocyte micronucleus test showed an abnormal rate of 0.02‰. Ophthalmic examinations (slit-lamp examination of the lens, the vitreous body, the fundus) showed no abnormality. The abnormal rate of leukocyte count was 3.70%, and the detection rate of small lung nodules was 48.15%. Conclusion The high-radon exposure minors had a high detection rate of small lung nodules, and lack knowledge of radon. It is urgent to strengthen the publicity and education on the hazards of radon and the prevention and control of occupational diseases.
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Objective:To analyze the levels of individual doses to radiation workers receiving medical radiation exposure in hospitals in Jiangxi province, so as to provide reference for radiation protection.Methods:The radiation workers of different types in medical institutions in Jiangxi were investigated from 2014 to 2018, involving diagnostic radiology, radiotherapy, nuclear medicine and interventional radiology. Statistical analyses were made of the individual doses to medical radiation workers in the province.Results:The total number of monitored workers were 23 833 with average annual individual effective dose of 0.316 mSv. NR1 and NR5, the ratios of the number of workers receiving annual individual doses exceeding 1 and 5 mSv to the total monitored workers were 4.32% and 0.10%, respectively. During the five-year period, the average annual individual effective dose showed a upward and then downward trend, with peak appearing in 2017. A total of 17 909 diagnostic radiologists were monitored, accounting for 75.14% of the total number of monitored workers. The average annual individual effective dose received by workers was 0.329 mSv, the highest, in interventional radiology, followed by diagnostic radiology 0.318 mSv, nuclear medicine 0.283 mSv, and radiotherapy 0.269 mSv, respectively. There were statistically significant differences among radiation workers of different types ( χ2=489.39, P<0.001). Conclusions:The average annual individual effective dose to the radiation workers in medical institutions in Jiangxi province meets the relevant national standards, but with an upward trend in nuclear medicine. The higher levels of individual doses to radiation workers are seen in primary and secondary hospitals. It should be strengthen the oversight of radiation workers in nuclear medicine and in primary and secondary hospitals.
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Objective To investigate the reasons why the routine monitoring of personal dose of occupational external exposure of some radiological workers in our province reached the investigation level in 2018, so as to provide technical support for the correct decision making of administrative departments. Methods The registration forms for monitoring and verifying the personal dose of occupational external exposure were issued to radiation workers whose periodic dose reached or exceeded 1.25 mSv/ cycle. Results A total of 102 person-times were sent out in 53 verification forms, and 95 person-times were collected in 47 copies. The recovery rate was 88.68%, and 7 person-times did not feedback the verification forms. There were 15 cases of actual exposure, accounting for 15.79%, including 5 cases of radiological diagnostic staff, who did not close the protective door when operating exposure. Among them, the other 80 cases, accouting for 84.21% didn't receive actual exposure. Conclusion The vast majority of radiological workers who reached the survey level didn't receive actual exposure. 5 person-time radiological diagnostic staff, during the work did not close the protective door, subjected to abnormal radiation. Interventional medicine, nuclear medicine and industrial mobile flaw detection workers are at higher risk of abnormal exposures during their work. The suspicious results of the questionnaires without feedback were all less than the annual dose limit and the requirements of audit management. We will strengthen supervision of radiation health protection, raise the awareness of radiation protection among radiation workers, and improve radiation protection management and protection conditions for radiation workers in interventional medicine, nuclear medicine and industrial mobile flaw detection furtherly.
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OBJECTIVE: To understand the exposure of occupational hazards, occupational and mental health status of high-speed railway locomotive drivers. METHODS: A total of 150 male high-speed railway locomotive drivers from Nanchang Railway administration were selected as experimental group, and 80 male ordinary train drivers were selected as control group by using a judgment sampling method. The occupational disease hazard testing and occupational health examinations were conducted in drivers of these two groups. The mental health status survey was conducted using the Symptom Checklist 90(SCL-90). RESULTS: The noise, power frequency electric field, formaldehyde, benzene, toluene, xylene and carbon dioxide in all the work place of these two groups were in line with the national occupational health standards. The exposure noise intensity of the experimental group was lower than that of the control group [(70.5±3.7) vs(77.4±4.1) dB(A), P<0.05]. The detection rates of hypertension and chronic gastritis were higher in the experimental group(18.7% vs 34.7%, 26.2% vs 42.0%, P<0.05). The detection rate of high frequency hearing loss decreased in the experimental group compared with the control group(22.5% vs 10.7%, P<0.05). The total score of SCL-90 in the experimental group was higher than that in the control group [(169.5±6.1) vs(148.0±6.0) score, P<0.01]. The positive rate of psychological symptoms was higher in the experimental group than that of the control group(41.3% vs 23.8%, P<0.01). CONCLUSION: The concentration/intensity of occupational disease hazards in the workplace of high-speed railway locomotives drivers is within normal limit. The occupational health status of high-speed railway locomotive drivers is generally good, but attention should be paid to their occupational mental health hazards.
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Since the reform and opening up, a large number of migrant workers to enter into the mining enterprises of the town, due to poor working conditions and lack of awareness of labor protection, a large number of workers at that time were diagnosed with occupational diseases such as pneumoconiosis, the lack of effective treatment and compensation mechanisms, it faces many difficulties of life, health care, employment and marriage, becoming more vulnerable, need access to national and social support and assistance. Currently, the patient's occupation of social assistance there are some flaws, and for the growing demand for professional rescue patients, China is still not established specifically for the social assistance system of the patient career, but also lack of systematic research. The paper combing through social assistance in the form and content of the existing occupation for patients and found deficiencies and problems of the current social assistance vocational patient exists, and proposed a framework for the establishment of vocational social assistance system of the patient, specific measures and means.
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OBJECTIVE: To establish a simultaneously detecting method for 9 kinds of anion in workplace air by ion chromatography. METHODS: Nine kinds of anions in workplace air include fluoride ion,chloride ion,nitrite ion,bromide ion,nitrate ion,sulfate ion,phosphate ion,oxalate denominationbl and iodide ion were sampled with sodium carbonatesodium bicarbonate( concentration 3. 2,1. 1 mmol/L respectively),separated by the anion column,detected by the conductivity detector and quantified by external standard method. RESULTS: The linearity of the 9 anions in the corresponding mass concentration range was good( correlation coefficient > 0. 999). The detection limit was 0. 02-0. 18mg/L and the marking recovery was 96. 0%-100. 5%. The within-run relative standard deviation( RSD) was 0. 3%-2. 5%,and the between-run RSD was 0. 4%-3. 1%. All the sampling efficiencies were > 96. 8%,and the samples could be stored at room temperature for 5 days. CONCLUSION: The method has good accuracy,high sensitivity,with simple and rapid operation,and can simultaneously measure various anions in the air of workplace.
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Objective:To investigate the association patterns of chronic disease-relevant risk factors for the adults in Haidian District.Methods:Data for chronic disease-relevant risk factors for 3 219 adults in Haidian District in 2014 were collected and analyzed.SPSS 18.0 was used for statistical description and logistic regression.SPSS Modeler 14.1 was used to explore the association among the chronic disease-relevant risk factors.Results:Among men,5 patterns of chronic disease-relevant risk factors were identified,which suggested that heavy drinking,inadequate intake of fruit and vegetables,and physical inactivity were associated with smoking while inadequate intake of fruit and vegetables and smoking were associated with physical inactivity.Among women,one pattern of chronic disease-relevant risk factor was identified,which suggested that inadequate intake of fruit and vegetables was associated with physical inactivity.Conclusion:Chronic disease-relevant risk factors are intercorrelated among the adults in Haidian District.Information on patterns of chronic disease-relevant risk factors could assist interventions targeting multiple behaviors simultaneously.
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Objective To assess the effect of nicotinic acid on hyperphosphatemia in maintenance hemodialysis (MHD) patients.Methods Twenty-six MHD patients with stable disease condition and hyperphosphatemia that could not be successfully controlled by conventional methods were selected.All patients were treated with oral nicotinic acid for 20 weeks.The changes of serum calcium,high sensitivity Creactive protein (hs-CRP),albumin (ALB),aspartate aminotransferase (AST),alanine aminotransferase (ALT),gamma-glutmyltransferase (GGT),total bilirubin (TBIL),derect bilirubin (DBIL),high density lipoprotein cholesferol (HDL-C),low density lipoprotein cholesferol (LDL-C),triacylglycerol (TG),total cholesterol (TC),intact parathyroid hormone,hemoglobin,platelet count,etc were observed before and after treatment.Results Two patients withdrew from this study because.of pruritus and diarrhea after two weeks of oral nicotinic acid.In 24 cases,compared with that before treatment,the serum phosphate,calcium-phosphorus product was decreased [(1.49 ± 0.19) mmol/L vs.(2.13 ± 0.16) mmol/L,(4.40 ± 0.49)mmol2/L2 vs.(5.45 ± 0.36) mmol2/L2] and HDL-C was increased [(1.45 ± 0.14) mmol/L vs.(1.18 ± 0.15)mmol/L] after treatment,and there was significant difference (P ＜ 0.05).There was no significant difference in the serum calcium,iPTH,LDL-C,TG,TC,ALB,AST,ALT,GGT,TBIL,DBIL,hs-CRP,platelet count,hemoglobin between before and after treatment (P ＞ 0.05).Conclusions Nicotinic acid is effective as all adjuvant measure in control of hyperphosphatemia in patients on MHD and can increase HDL-C.It provides a new approach for the treatment of hyperphosphatemia.
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Objective To investigate the current situation and influencing factors of overweight and obesity in the elderly from Changsha city.Methods Using stratified sampling,2500 elderly in Changsha were included for the investigation by questionnaire and physical examination.The influencing factors were analyzed with univariate analysis and two-level models.Results Among 2500 persons,the valid questionnaires were 2254,the effective rate was 90.16％.About 39.71％ (895/2254) of Changsha's elderly were in overweight and obesity (BMI≥ 24 kg/m2).Univariate analysis showed that there were significant differences in BMI among different area,education degree,income,marital status,drinking wine,drinking tea,physical exercises and occupation (x2＝ 304.17,18.39,19.35,12.93,13.29,11.77,12.87,12.84,all P＜0.05).The results of two-level models indicated that the independent influencing factors were income,physical exercises,drinking wine,age and occupation.Conclusions It is necessary to take interventional measures against elderly obesity and to encourage the elderly taking physical exercises and keeping reasonable diets.
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Objective To study the impact of different insulin levels on the conversion from impaired glucose tolerance (IGT) to type 2 diabetes mellitus (T2DM),through analysis of different glycometabolism condition among quinquagenarian population.Methods Subjects enrolled were Beijing habitants who received annual physical examination [ including oral glucose tolerance test (OGTI) ] in the Chinese PLA General Hospital from 2005-2007.According to the OGTT results,the subjects were divided into three groups,including normal glucose tolerance-non-hyperinsulinemia group (NGT-NHIns),IGT-hyperinsulinemia group (IGT-Hins) and IGT-non-hyperinsulinemia group (IGT-NHINS).The prognosis between the year 2009 and 2010 of the three groups was observed.Hyperinsulinemia was diagnosed with fasting serum insulin ≥ 15 mU/L and/or 2-hour serum insulin ≥ 80 mU/L after glucose loading.Results The rate of case number of conversion to T2DM in IGT-NHIns group (42/133) was higher than that in IGT-Hins group (24/154) or NGT-NHIns group (12/126).The HOMA insulin resistance index (HOMAIR) of individuals with IGT-NHIns was lower than that of IGT-Hins [ 0.96 (0.40,3.53 ) vs 2.04 (0.59,23.20),P ＜ 0.05 ],while whole body insulin sensitivity index (WBISI) was higher than that of IGT-Hins [ 7.48 (3.20,31.35 ) vs 3.28 ( 0.86,7.67 ),P ＜ 0.05 ].Modified β-cell function index ( MBCI ) and insulin secretion index (ISI) in IGT-NHIns was poorer than that of IGT-Hins respectively [ 2.57 (0.58,10.98) vs5.17(1.04,65.09); 7.66 (0.99,28.40) vs 17.56 (4.18,96.46),allPvalues ＜0.01].Conclusions The risk of IGT-NHIns progressing into T2DM is higher than that of IGT-Hins. For the prevention of T2DM,individuals with IGT-NHIns should be paid more attention than keeping an eye on IGT-Hins patients.Early control of risk factors could protect β cell function and prevent the progression to T2DM.
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<p><b>OBJECTIVE</b>To observe the effect of basic fibroblast growth factor (bFGF) on neovascularization and prefabricated flap survival.</p><p><b>METHODS</b>Male New-Zealand rabbits weighting 2.0-2.5 kg were used in this study. The experimental model used a prefabricated neck flap, supplied by the transferred and implanted central vascular bundle of the ear. 9 micrograms bFGF and 0.2 ml of normal saline was instilled in the vascular pedicle of the experimental and the control group respectively. After 1, 2, 3 weeks of operation, the neovascularization was studied by confocal laser scanning microscope (CLSM) and flap survival was observed.</p><p><b>RESULTS</b>The neovascularization and survival of the prefabricated flap was different in the experimental and the control groups. The experimental group was better than the control group.</p><p><b>CONCLUSION</b>bFGF treatment improved sprouting of the implanted vessel and the prefabricated flap survival.</p>
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Animales , Masculino , Conejos , Factor 2 de Crecimiento de Fibroblastos , Farmacología , Supervivencia de Injerto , Fisiología , Microscopía Confocal , Neovascularización Fisiológica , Colgajos Quirúrgicos , Fisiología , Factores de TiempoRESUMEN
Aim To clone and express the 1.2kb cDNA fragment (1/753-2 934bp) of human integrin α 4 subunit. Methods The 1.2 kb cDNA fragment of human integrin α 4 subunit was amplified from HL-60 total RNA by RT-PCR, then it was subcloned into expression vector pGEX-3X and induced with IPTG. Results The 1.2 kb cDNA fragment of human integrin α 4 subunit was cloned. The sequencing indicated that there was only one missense mutation (Arg→ Gln) among the fragment, and this mutation won't affect antigenicity after analysed by GOLDKEY. Then the 1.2 kb cDNA was subcloned into expression vector pGEX-3X. The α 4 fragment was highexpressed in E.coli after induced with IPTG. Conclusion The 1.2kb cDNA fragment of α 4 subunit was obtained, and it was highexpressed in E.coli, it might be important for study on the function of α 4 integrins.
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Objective To explore the basic health state of the hotels in Haidian District. Methods 736 hotels were chosen to investigate on the hygiene state, in Haidian District, Beijing, during Feb.-Jul., 2006, based on the tables for the hygienic quantified and classified management of hotel health supervision. Results The hygienic quantified and classified standard score of 736 hotels was 53.7?22.6, and the standard score of the common hotels, one or two stars hotels and three or more stars hotel were 50.9?21.5, 58.9?24.7, 76.4?17.1. 50 households (6.8%) within them were A degree, 144 households (19.6%) were B degreee, 121 households(16.4%) were C degree and 421 households(57.2%) were D degree. Conclusion The general hygienic state of the hotels should be paid more attention to. The hygienic state changes with the level of the hotels.
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Objective To explore the health inspector effect on the score of hygienic degree of hostels. Methods Using the scale for hygienic degree of hostels, 38 health inspectors from 9 sections in the Bureau for Health Inspection and Supervision of Haidian District in Beijing, scored 621 hostels in the district. The multilevel statistics model has been used to analyze the health inspector effect, of which the index is intra-class correlation (ICC), in the double level model structured by hostels as the level 1 unit and inspectors as the level 2 unit, and in the triple level model structured by hostels as the level 1 unit, inspectors as the level 2 unit and the sections as the level 3 unit. Results In the double level model, ICC of the level 2 unit is 0.142 8. In the triple level model, ICC of the level 2 unit is 0.0000 and ICC of the level 3 unit is 0.154 1. Conclusion There is inspector effect influencing the score of hygienic degree. And the effect seems to be more similar in one section comparing with the other ones.
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Objective:To explore the effect of liposomal transfection of survivin siRNA on the proliferation and apoptosis of lung adenocarcinoma cell lines A549.Method:Survivin siRNA was synthetized and transfected into A549 cell by liposome.Cell morphological change was observed with inverted fluorescent microscope,cell proliferation was examined by MTT assay at 24h 48h and 72h after transfection.cell proliferation and apoptotic index detected by flow cytometry and survivin mRNA expression determined by RT-PCR.Results:For the A549 cell transfected with siRNA cell proliferation was ihibited significantly,cell apoptosis appeared obvious and the expression of survivin mRNA significantly decreased.Conclusion:Survivin siRNA is able to inhibit the proliferation of lung adenocarcinoma cell lines A549 and induce the cell apoptosis.Survivin might become a new target for lung carcinoma gene therapy.