Background::At present, a large number of chronic obstructive pulmonary disease (COPD) patients are undiagnosed in China. Thus, this study aimed to develop a simple prediction model as a screening tool to identify patients at risk for COPD.Methods::The study was based on the data of 22,943 subjects aged 30 to 79 years and enrolled in the second resurvey of China Kadoorie Biobank during 2012 and 2013 in China. We stepwisely selected the predictors using logistic regression model. Then we tested the model validity through P-P graph, area under the receiver operating characteristic curve (AUROC), ten-fold cross validation and an external validation in a sample of 3492 individuals from the Enjoying Breathing Program in China.Results::The final prediction model involved 14 independent variables, including age, sex, location (urban/rural), region, educational background, smoking status, smoking amount (pack-years), years of exposure to air pollution by cooking fuel, family history of COPD, history of tuberculosis, body mass index, shortness of breath, sputum and wheeze. The model showed an area under curve (AUC) of 0.72 (95% confidence interval [CI]: 0.72-0.73) for detecting undiagnosed COPD patients, with the cutoff of predicted probability of COPD=0.22, presenting a sensitivity of 70.13% and a specificity of 62.25%. The AUROC value for screening undiagnosed patients with clinically significant COPD was 0.68 (95% CI: 0.66-0.69). Moreover, the ten-fold cross validation reported an AUC of 0.72 (95% CI: 0.71-0.73), and the external validation presented an AUC of 0.69 (95% CI: 0.68-0.71).Conclusion::This prediction model can serve as a first-stage screening tool for undiagnosed COPD patients in primary care settings.

OBJECTIVE：To struc turally modify shikimic acid ，and to investigate the reversal effects of its derivatives on paclitaxel-resistant human breast cancer cells MCF- 7/PTX. METHODS ：Using shikimic acid as the lead structure ，1-position carboxyl group was structurally modified to synthesize a series of shikimic acid derivatives through esterification ，amidation， hydrogenation and reduction ，etc. Using non-drug resistant cells MCF- 7 as reference ，MTT assay was used to screen derivatives with inhibitory activity as well as half-inhibitory concentration （IC50）and reversal index （RI）of derivatives to MCF- 7/PTX. With the drug resistance-related transgelin 2 as the target ，the molecular docking of the active derivatives with the drug resistance-related protein was carried out by using Glide 1.0 computer-aided design software. RESULTS ：Totally 15 derivatives were obtained （T1-T15）， of which T 4-T15 were obtained for the first time. MTT assay showed that （3R， 4S， 5R） -N-benzyl-3， 4， 5-trihydroxy-1-cyclohexene-1-formamide（T7），（3R，4S，5R）-N-（3，4，5-trihydroxy-1-cyclohexenylmethyl）-benzylamine（T14）， （3R，4S，5R）-3，4-O-isopropyl-5-O-acetyl-1-cyclohexene-1-methyl formate （T15）inhibited MCF- 7 and MCF- 7/PTX cells to a certain extent ；IC50 values of T 7，T14 and T 15 combined with pacliaxel to MCF- 7/PTX cells were significantly lower than that in negative control （Paclitaxel alone ）group（P＜0.05）. RIs of T 14 and T 15 were higher ，and RIs of the highest dose were 8.8 and 9.3， which were equivalent to positive control verapamil （10.8）. Th e results of molecular docking showed that the hydroxyl groups at positions 3，4 of T 7 could form multiple hydrogen bonds with ； Arg625 and Asp 627 in the catalytic region of transgelin 2. In addition to the hydrogen bond mentioned above at T 7，the mail：batistuta28@126.com secondary amine side chain at position 1 of T 14 could also form hydrogen bond with Glu 657 of transgelin 2. When the hydroxyl group on the T 15 mother nucleus was derived from the donor group ，the binding of the hydroxyl group to transgelin 2 was closer and the inhibition was enhanced. CONCLUSIONS ： The derivatives T 7，T14 and T 15 have certain reverse activity to paclitaxel-resistant human breast cancer cells. The polyhydroxy structure of the mother nucleus is the main structural region of the hydrogen bond between shikimic acid and its derivatives and transgelin 2. The derivation of its power supply group or the introduction of secondary amines and hydrophobic groups into the 1-carboxyl group of shikimic acid is benifit for enhancing the drug resistance reversal effect of derivative .

OBJECTIVE: To investigate the risk factors and clinical outcome for carbapenems-resistant Pseudomonas aeruginosa (CRPA) infection, and to provide reference for the prevention and treatment of CRPA infection.METHODS: In retrospective investigation, medical records of CRPA and carbapenems-sensitive Pseudomonas aeruginosa (CSPA) infection were collected from our hospital during 2013-2016. CRPA infection risk factors were judged by single factor analysis. The relationship of CRPA risk factors and death was judged by multivariate Logistic regression analysis. RESULTS: A total of 556 cases of P. aeruginosa infection were collected, including 96 cases of CRPA injection, accounting for 17. 3％. Multivariate Logistic regression analysis of related factors of CRPA infection showed that independent risk factors of CRPA infection included admission to ICU for more than 3 days before the isolation of P. aeruginosa [OR= 2. 691, 95％ CI (1. 348, 5. 373), P=0. 005], the use of third-generation or fourth-generation cephalosporin [OR= 0. 386, 95％ CI (0. 200, 0. 742), P=0. 004], complicated with other pathogenic bacteria infection [OR= 1. 892, 95％ CI (1. 132, 3. 164), P=0. 015], combined with 2 kinds of antibiotics or above [OR=5. 631, 95％ CI (2. 556, 12. 407), P=0. 000]. Clinical outcome analysis, mortality rate of CRPA infection were 12. 5％, significantly higher than CSPA infection (2. 8％), Logistic regression analysis, there is a correlation between death rate [OR=5. 003, 95％CI (1. 975, 12. 675), P=0. 001] and CRPA infection. CONCLUSIONS: For the prevention of CRPA nosocomial infection, it is necessary to reduce the time of ICU stay and rationally select antibiotics according to pathogenic bacteria so as to reduce the occurrence of CRPA infection.

OBJECTIVE:To study risk factors for carbapenem-resistant Acinetobacter baumannii(CRAB)infection,and to provide reference for its clinical prevention. METHODS:In retrospective study,302 A. baumannii(AB)infection patients were collected from our hospital during Dec. 2012 to Jun. 2017. According to the results of drug sensitivity test,those patients were divided into CRAB group(116 cases)and non-CRAB group(186 cases). Risk factors for CRAB infection were analyzed by using univariate analysis. Multivariate Logistic regression analysis was performed for variables with significant difference between 2 groups. RESULTS:Univariate analysis showed that the factors of significant difference in 2 groups including patients suffering from septic shock(P=0.003),sepsis(P=0.000),combined with other infection(P=0.006),diabetes(P=0.029),malignant tumors(P=0.036),patients suffering from infection of other site except for pulmonary infection,intraabdominal infection and skin infection(P=0.009)before AB isolation,patients given carbapenems(P=0.002)and antifungal drugs 28 d before AB isolation(P=0.002). Multivariate Logistic regression analysis showed that the factors of significant difference in 2 groups including patients suffering from sepsis(P=0.033)or diabetes(P=0.011)before AB isolation. CONCLUSIONS:Independent risk factors for CRAB infection include patients suffer from sepsis or diabetes before AB isolation.

Objective To explore the influence of agricultural mechanization progress on epidemic intensity of hemorrhagic fever with renal syndrome (HFRS) so as to provide reference for prevention and control of HFRS in rural areas.Methods Data of HFRS epidemics and agricultural mechanization progress of Qingdao City and five main epidemic areas of HFRS were collected by retrospective analysis methods.Agricultural mechanization progress,time distribution,incidence rate of HFRS and capture rate of rats were compared,respectively.Risk factors were analyzed by case-control study using simple random sampling method.Cases of case group were selected from HFRS cases of Jiaonan County recovered between 2012 and 2013.The control group was healthy residents with a equal number of the case group.Residential locations,work ways,rodent infestation at work locations and in residential areas and skin injury conditions were surveyed by a household questionnaire survey.Results Agricultural machinery gross power of Qingdao City was developed from 174.76 megawatts of electricity (mwe) in 1985 to 854.00 mwe in 2015.The comprehensive mechanization degree marched from 60.0％ in 1994 to 90.2％ in 2015.HFRS incidence in Qingdao City declined from the first epidemic peak (1986) of 32.97/100 000 to the third peak (2012) of 3.54/100 000.HFRS incidence in Jiaonan,Jiaozhou,Pingdu,Laixi,Jimo cities reduced from the first epidemic peak (1985 or 1986) of 101.25/100 000,86.37/100 000,35.80/100 000,11.55/100 000,8.13/100 000 to the third peak(2012) of 14.68/100 000,4.43/100 000,2.33/100 000,6.02/100 000,3.26/100 000.The platform stage of epidemic peak in autumn and winter shortened from 4 or 5 months to 2 months.The capture rate of rats fluctuated around 2％.The infection risk of small farm implements or handwork was greater than huge mechanization (OR =0.01,P ＜ 0.01).Conclusions Agricultural mechanization changes the agricultural activity patterns to a large extent and lowers the HFRS epidemic by minimizing the risk of infection and shortening the platform stage of epidemic peak.The higher the degree of mechanization,the lower the epidemic intensity.

Objective To investigate the effects of perioperative parecoxib sodium on serum surfactant protein A and inflammatory response in elderly patients undergoing video-assisted thoracoscopic pneumonectomy,Methods Sixty-two ASA Ⅰ or Ⅱ elderly patients,aged 65-78 years,weighing 51-79 kg,scheduled for elective video-assisted thoracoscopic pneumonectomy under general anesthesia,were randomly divided into 3 groups:0.3 mg/kg parecoxib sodium group (group P1,n=21),0.6 mg/kg parecoxib sodium group (group P2,n =21) and control group (group C,n =20).The patients were given intravenous parecoxib sodium of 0.3 mg/kg immediately before induction of anesthesia and at 12 h after operation in group P1,and also parecoxib sodium of 0.6mg/kg immediately before induction of anesthesia and at 12 h after operation in group P2,while the equal volume of normal saline was given in group C.Blood samples were taken from the central vein before the induction of anesthesia(T0),after operation(T1),12 h after operation(T2) and 24 h after operation(T3).The concentration of serum surfactant protein A (SP-A),TNF-α,IL-6 and IL-8 were determined by ELASA.The incidence of pulmonary complications at 72 h after operation were also recorded.Results Compared with T0,the concentration of serum SP-A,TNF-α,IL-6 and IL-8 increased significantly in all groups at T1-T3 (P＜0.05).Compared with C group,the concentration of serum SP-A,TNF-α,IL-6 and IL-8 in groups P1 and P2 decreased significantly at T1-T3 (P＜0.05),there were no significant differences between groups P1 and P2.The incidence of postoperative pulmonary complications had no statistically significant differences between the three groups.Conclusion Parecoxib sodium can significantly reduce the concentration of serum SP-A and alleviate the inflammatory response in elderly patients undergoing video-assisted thoracoscopic pneumonectomy.

Objective To evaluate the relationship between anterior chamber angle and intraocular pressure (IOP) after laser peripheral iridotomy (LPI) treatment.Methods A retrospective cases control study was adopted.Fifty-eight patients (58 eyes) who were diagnosed as primary angle closure (PAC) were included in this study.Ultrasound biomicroscopy (UBM) parameters in angle opening distance (AOD),trabecular iris area (TISA) and angle recess area (ARA) examination were performed before LPI.The changes of intraocular pressure (IOP) were compared between different time-points (before and 1 hour,2 hours,8 hours,24 hours,2 weeks,6 months and 12 months after LPI).The patients were divided into IOP≤21 mmHg group (41 eyes) and IOP＞21 mmHg group (17 eyes) after LPI.Relationship between anterior chamber angle and IOP after LPI treatment was explored.This study was approved by Ethic Committee of the Henan Eye Institute and informed consent was obtained from each patient.Results The IOPs were increased in 1 hour,2 hours after LPI and lowered in 2 weeks,6 months,12 months after LPI compared with IOP before LPI,with significant differences between them (all at P＜0.01).Twelve patients suffered transient elevated IOP and recovered by self-healing or treatment.IOP of 4 patients were elevated after 6 months to 1 year follow-up.The IOPs in 2 weeks,6 months and 12 months after LPI were lowered compared with IOP before LPI,with significant differences between them (all at P＜0.01).The UBM parameters were significantly increased in 2 weeks,6 months,12 months after LPI in comparison with IOP before IPL (all at P＜0.01).IOP and UBM parameters values were significantly different between IOP＞21 mmHg group and ≤21 mmHg group after LPI.Regression analysis indicated that ARA750 (OR =0.75,P＜0.05) was correlated to the IOP after LPI rather than IOP before operation,AOD and TISA (P＞0.05).Conclusions ARA750 value is correlated with the IOP variations after LPI.UBM structured observation can improve the surgical successful rates and safty and prevent complications.

OBJECTIVE:To explore the risk factors for nosocomial infection of multidrug-resistant organism (MDRO) in ICU,and to provide reference for preventing and controlling MDRO in ICU. METHODS:In retrospective study,246 patients with nosocomial infection from ICU of Xi'an Aerospace General Hospital (hereinafter referred to asour hospital) during Jan. 2011-Dec. 2015 were selected and divided into non-MDRO infection group (140 cases) and MDRO infection group (106 cases). The detection and drug resistance of MDRO were analyzed in MDRO group. Univariate analysis and binary Logistic regression anal-ysis were used to explore risk factors for nosocomial infection of MDRO. RESULTS:During 2011-2015,435 strains of MDRO were isolated from 106 MDRO infection patients,in which Gram-negative bacteria accounted for 89.43%,showing severe drug re-sistance. Univariate analysis showed that the following 13 factors were related to nosocomial infection of MDRO,such as ICU ad-mission time,hypoproteinemia,acute cerebrovascular diseases,renal abnormalities,mechanical ventilation time,arterivenous cath-eterization time,urethral catheterization time,indwelling gastric tube time,type and time of using antibiotics,combined use of an-tibiotics,application of carbapenems and the third generation caphalosporins(P<0.05). Binary Logistic regression analysis showed that acute cerebrovascular diseases,type and time of using antibiotics were the independent risk factors for nosocomial infection of MDRO in ICU [odds ratios were 2.816,1.582,1.265,95%CI were (1.540,5.151),(1.085,2.306),(1.131,1.415)]. CONCLU-SIONS:Some prevention and control measures should be taken actively for high-risk MDRO infection patients in ICU to reduce the incidence of nosocomial infection of MDRO and improve the quality of health care.

Objective According to analyse SCI papers published by hospital faculties during the period of 2010-2015,this paper discussed influential factors and strategies for paper publishing from the perspective of hospital scientific research management,proposed suggestions to administrative department and leaderships for decision making.Methods Taking SCI database developed by Institute for Scientific Information (ISI) as data resource.Literature analysis method was used to analyze the SCI papers during 2010 2015 in terms of publishing amount,subject development,periodical distribution,foundation support,citation analysis,etc.Results The amount of the SCI papers increased sharply each year with a wide spread of extensive subjects which reveals the development of the medical research.However,the average Impact Factor of the paper is still struggling behind that of the top medical institutes.Most papers published in the hospital is supported by National Science Foundation of China (NSFC).Conclusions This paper proposed that the hospital needs to establish a series of policies to strengthen the project management and talent training in the long run,encourage publishing high quality papers to promote the development of disciplines,increasing the investment for constructing research platforms and also making good use of administration for better research.

OBJECTIVE:To provide reference for the formulation of correct antifungal treatment strategy,and to promote stan-dard use of antifungal agent. METHODS:A retrospective survey was conducted for 138 haematologic patients from May 2013 to May 2014 in a third grade class A hospital,of whom all had used antifungal drugs during hospitalization. We collected all patients' information and analyzed it statistically. RESULTS:Of 138 haematologic patients,3 were proven IFD (all were Candida infec-tion),6 were probable IFD,12 were possible IFD,and 117 were undefined IFD. The positive rates of fungi pathogenic detection, fungal smear,G-test,and GM-test were 15.3%,9.4%,6.4% and 23.4% respectively. 6 kinds of antifungal were used,and vori-conazole had the highest frequency,followed by fluconazole,itraconazole,amphotericin B,caspofungin and micafungin. 62.3%patients used only one kind of antifungal,but 15.9% patients used 2 or more kinds of antifungal. The average medication course was 20.5 days(1 day to 125 days). Irrational drug use showed improper drug selection,unreasonable dose,and replacing antifun-gal with insufficient basis. CONCLUSIONS:The antifungal use in haematologic patients in the hospital is consistent with the re-quirements of guidelines,but there are still some issues as insufficient antifurgal drug treatment course to be further standardized.