Objective The aim of this study was to investigate the prospective association between physical activity (PA),independently or in conjunction with other contributing factors,and osteoporosis (OP) outcomes. Methods The Physical Activity in Osteoporosis Outcomes (PAOPO) study was a community-based cohort investigation. A structured questionnaire was used to gather the participants' sociodemographic characteristics. Bone mineral density (BMD) measurements were performed to assess OP outcomes,and the relationship between BMD and OP was evaluated within this cohort. Results From 2013 to 2014,8,471 participants aged 18 years and older were recruited from Tangshan,China's Jidong community. Based on their PA level,participants were categorized as inactive,moderately active,or very active. Men showed higher physical exercise levels than women across the activity groups. BMD was significantly higher in the very active group than in the moderately active and inactive groups. Individuals aged>50 years are at a higher risk of developing OP and osteopenia. Conclusion The PAOPO study offers promising insights into the relationship between PA and OP outcomes,encouraging the implementation of PA in preventing and managing OP.

On January 22, 2020, China National Center for Bioinformation (CNCB) released the 2019 Novel Coronavirus Resource (2019nCoVR), an open-access information resource for the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). 2019nCoVR features a comprehensive integra-tion of sequence and clinical information for all publicly available SARS-CoV-2 isolates, which are manually curated with value-added annotations and quality evaluated by an automated in-house pipeline. Of particular note, 2019nCoVR offers systematic analyses to generate a dynamic landscape of SARS-CoV-2 genomic variations at a global scale. It provides all identified variants and their detailed statistics for each virus isolate, and congregates the quality score, functional annotation,and population frequency for each variant. Spatiotemporal change for each variant can be visualized and historical viral haplotype network maps for the course of the outbreak are also generated based on all complete and high-quality genomes available. Moreover, 2019nCoVR provides a full collection of SARS-CoV-2 relevant literature on the coronavirus disease 2019 (COVID-19), including published papers from PubMed as well as preprints from services such as bioRxiv and medRxiv through Europe PMC. Furthermore, by linking with relevant databases in CNCB, 2019nCoVR offers data submission services for raw sequence reads and assembled genomes, and data sharing with NCBI. Collectively, SARS-CoV-2 is updated daily to collect the latest information on genome sequences, variants, hap-lotypes, and literature for a timely reflection, making 2019nCoVR a valuable resource for the global research community. 2019nCoVR is accessible at https://bigd.big.ac.cn/ncov/.

Objective: To validation and optimization the indicator system of risk assessment for mechanical cuts. Methods: The risk assessment index system of mechanical cutting injury established earlier was used to assess the risk of mechanical cutting injury in 40 cases of mechanical cutting injury registered from January 2015 to December 2017 and 40 similar positions without accidents in the same period. The multiple stepwise regression analysis was used to screen the indicator system, and to adjust the weight coefficient of each index. The total coincidence rate and Kappa value were compared between before and after optimization respectively. Results: The new index system has 3 first-class indicators, 10 second-class indicators and 14 three-class indicators, fewer than the old index system which has 3 first-class indicators, 10 second-class indicators, 34 three-class indicators. There three indicators have revamped in the first-class. The total of coincidence rates of the new and old indicator systems were 67.50% and 90.00%, the difference was statistically significant (P<0.01). The Kappa value were 0.35 and 0.80, respectively. Conclusion The evaluation results with new indicator systems is more consistent with the actual hazard detection the the old indicator systems, and scientific, reasonable and practical, and the indicator system of risk assessment for mechanical cuts can be used for the risk assessment of mechanical cutting injuries.

The hospital effectively improved the accuracy of data acquisition in performance appraisal of medical equipment, by means of better basic data management architecture, full-course supervision, clarified responsibility system, and intelligent new technologies. It holds that the information system and application of new technologies can help ensure the collection of basic data in a timely and effective manner, while orchestrated work of sections can ensure the authenticity and accuracy of performance appraisal and improve the using efficiency of medical equipments.

BACKGROUND: Measuring result of the lower limb alignment is often influenced by various factors, such as femoral bowing angle (FBA) in different positions.OBJECTIVE: To measure the FBA and femoral valgus correction angle (VCA) in different positions after CT reconstruction of lower limb model, and simulating X-ray examination, and to explore the rule of FBA affecting lower limb alignment.METHODS: Twenty patients undergoing CT angiography of lower extremity artery were enrolled, three-dimensional reconstruction of low limb was established on Mimics13.0 software based on CT data, and the FBA in standard posture was determined. All patients were divided into groups A (FBA > 2°), B (2° > FBA > 0°), C (0° > FBA > -2°) and D (FBA <-2°) (n=5 per group). Then each model was revolved through the vertical axis from 20° of internal rotation to 20° of external rotation by 2° for one motion, and 21 three-dimensional images were transformed into two-dimensional images to obtain the X-ray images of low limb. FBA and VCA in different positions were measured.RESULTS AND CONCLUSION: (1) The outcome measurements showed that FBA tended to be decreased in internal rotation and increased in external rotation. (2) VCA tended to be increased in external rotation and decreased in internal rotation. (3) FBA was positively correlated with VCA in the different positions (P < 0.01). (4) These results suggest that FBA can be altered with rotation and even expose influence on VCA. The bigger FBA is, the more influence on the lower limb alignment. Therefore, it is advisable to conduct the full length X-ray of lower limb in a standard posture, especially for the patients with larger FBA.

This paper summarized that the treatments of nourishing lung yin and Tonifying Qi, promoting blood circulation and removing blood stasis and the method of Chinese medicine iontophoresis could work on lung function of the patients with idiopathic pulmonary fibrosis. The review suggested that traditional Chinese medicine compound for treating pulmonary fibrosis mainly by Nourishing Yin, Qi and promoting blood circulation. In the treatment of IPF, the combination of traditional Chinese medicine and Western medicine showed more benefit than western medicine treatment alone.

OBJECTIVE:To study the effect and its mechanism of carvedilol on leptin-induced activation and proliferation of LX2 human hepatic stellate cells(HSC-LX2). METHODS:HSC-LX2 with logarithmic growth periods were divided into blank con-trol group,leptin-stimulated group and carvedilol low-concentration,medium-concentration,high-concentration groups(5,10,20μmol/L). Except for the blank control group,other groups were added 0.1 g/L leptin and corresponding concentration of carvedilol. After 24 h,MTT method was used to detect the optical density(OD)value of cells and calculate the proliferation rate. Flow cytom-etry was used to detect the cell cycle and apoptosis. Real-time fluorescence quantitative polymerase chain reaction method was used to detect the α-smooth muscle actin (α-SMA),matrix metalloproteinase inhibition factor 1 (TIMP-1),leptin,leptin receptor mRNA expressions. Western blot method was used to detect phosphorylated Janus kinase 2(p-JAK2),phosphorylated signal trans-duction and transcriptional activator 3 (p-STAT3) protein expressions. RESULTS:Compared with blank control group,OD value of cell was increased in leptin-stimulated group;apoptotic rate was decreased;cells of G0/G1 were decreased;α-SMA,TIMP-1, leptin,leptin receptor mRNA expressions and p-JAK2,p-STAT3 protein expressions were increased (P<0.05). Compared with leptin-stimulated group,OD values of cells were decreased in carvedilol concentration groups;apoptotic rate was increased,and the cells were mainly blocked in G0/G1 phase;α-SMA,TIMP-1,leptin,leptin receptor mRNA expressions and p-JAK2,p-STAT3 protein expressions were decreased(P<0.05)and was concentration-depended(P<0.05). CONCLUSIONS:Carvedilol can inhibit the activation and proliferation of leptin-induced HSC-LX2,promote its apoptosis. The mechanism may associate with down-regulat-ing leptin,leptin receptor gene expression and blocking JAK2/STAT3 signal pathway activation by leptin in cells.

OBJECTIVE: To study the intervention effects of participatory training on the occupational health in polishing workers. METHODS: By the stratified random sampling method,930 front-line polishing workers were selected from 50 manufacturing enterprises in Guangzhou,467 workers in the intervention group and 463 workers in the control group. The intervention group adopted participatory training and the control group adopted the traditional training. We evaluated the changes of occupational health knowledge,attitude and practice( KAP) in workers of these two groups using the questionnaire table of occupational health KAP for polishing workers. Data of before intervention,immediately after intervention and 3 months after intervention were collected. RESULTS: The workers 'knowledge,attitude and practice scores at the time point of immediately after intervention were higher than those before intervention in the same group( P <0. 05). The workers' knowledge and practice scores of 3 months after intervention in intervention group were higher than those before intervention( P < 0. 05). The knowledge and practice scores of 3 months after intervention in the intervention group were higher than that in the control group( P < 0. 05). The evaluation scores on protection measure and warning signs of workers in the intervention group were lower than those in workers of control group 3 months after the intervention( P < 0. 05). Three months after the intervention,the workers in intervention group believed that the training was more effective than that in the control group in the following 6 aspects: improving the knowledge of occupational health,improving the ability of identifying risk factors, learning to use the personal protective equipment, helping other workmates,having confidence to make suggestions and introducing other workmates to participate in training( P < 0. 05).CONCLUSION: The participatory training is an effective intervention model in improving the workers ' awareness of occupational health KAP.

Objective To analyze the setup errors of external?beam and intracavitary radiotherapy for cervical cancer based on the data of cone?beam computed tomography ( CBCT) , and to provide a basis for clinical practice. Methods Sixty patients with stage ⅡA?ⅢB cervical cancer who were admitted to our hospital and underwent external?beam and intracavitary radiotherapy from March to June, 2015 were enrolled as subjects. Sixty patients with stage ⅡA?ⅢB cervical cancer undergoing conventional external?beam radiotherapy within the same period were also enrolled. The CBCT?based setup errors, containing setup errors in x, y, and z directions and three?dimensional vector deviation, in the initial treatment were obtained from each patient. Comparison of errors between the two treatment approaches was made by independent?samples t test. Results Fitting the data to a linear model revealed that the setup errors in x, y, and z directions increased with the increase in the distance between the position reference point and the center point of the target volume. External?beam radiation combined with intracavitary radiation had significantly reduced setup errors in x, y, and z directions than the conventional external?beam radiation ( 0.13± 0?12 vs. 0.31± 0?24, P=0?000;0.23±0?18 vs. 0.47±0?36, P=0?001;0.18±0?11 vs. 0.27±0?18, P=0?001). Conclusions In order to reduce the setup errors, CT scan needs not only a reference marker as close as possible to the center of the tumor, but also a reliable and accurate approach for postural fixation.

Objective To investigate the effect of different additional filtration thickness of DSA on image quality and radiation dose with cerebral angiography. Methods Prospective collected 90 patients with DSA examination of the whole cerebral artery, patients were divided into A, B and C group according to the time of the examination, each group included 30 cases. Patients underwent conventional DSA, the additional filtration of group A, B and C were (1.0 mmAl+0.1 mmCu), (1.0 mmAl+0.4 mmCu) and (1.0 mmAl+0.9 mmCu), respectively. Dose area product (DAP), air kerma (AK), tube current and tube voltage of anteroposterior and lateral radiography of the whole brain were recorded, and scored the image quality. Eye lens organ dose values were obtained by using simulation phantom and LiF dosemeter under A, B and C groups with three different additional filtrations for cerebral angiography. The image quality scores and the radiation dosewere analyzed by one-way ANOVA tests or Kruskal-Wallis tests. Results The image quality comprehensive score of three groups showed significant difference (F=40.07,P<0. 01), which were (3.8±0.4), (3.6 ± 0.5) and (3.0 ± 0.6), respectively. The DAP and AK value of anteroposterior and lateral radiography of three groups also showed significant difference (P<0.05), B and C group were lower than the A group. Left and right eye lens organ dose were decreased along with the increase of the additional filtration thickness, and the difference between the 3 groups also had significant difference (P<0.01). Conclusion Both the image quality and radiation dose can acquire when conducted the whole brain DSA with 1.0 mmAl+0.4 mmCu additional filtration.