In this cross-sectional survey,2 682 traffic policemen in Tianjin were enrolled,and they were tested with Occupational Stress Inventory-Revised (OSI-R) and Symptom Checklist 90 (SCL-90).Body mass index,blood pressure,fasting blood glucose,triglycerides,and high-density lipoprotein-cholesterol ( HDL-C ) were also determined at the same time. Correlation analysis showed that body mass index was positively correlated with somatization ( r =0.039,P =0.045 ),hostility ( r =0.046,P =0.01 8 ),and psychoticism ( r =0.041,P =0.036).Systolic blood pressure was positively correlated to somatization (r =0.056,P =0.004 ),obsessive-compulsiveness ( r =0.044,P =0.023 ),interpersonal sensitivity ( r =0.041,P =0.034 ),depression ( r =0.039,P =0.043),anxiety ( r =0.055,P =0.004 ),and psychoticism ( r =0.051,P =0.009 ).Diastolic blood pressure was positively correlated to somatization ( r =0.047,P =0.015 ),interpersonal sensitivity ( r =0.042,P =0.030 ),anxiety ( r =0.050,P =0.010 ),and psychoticism ( r =0.047,P =0.014 ).Fasting blood glucose was positively correlated to somatization ( r=0.042,P=0.028 ).Multiple regression analysis showed that occupational stress factors were role boundary,physical environment,responsibility,recreation,role ambiguity,role overload,and cognitive coping.Among these factors,role ambiguity and cognitive coping reduced occupational stress while others increased the stress.The results of the unconditional logistical regression analysis showed that there is an independent association of metabolic syndrome with somatization,role insufficiency,and physical strain for the task and body tension ( P＜0.01).

High-density channels are often used to acquire electroencephalogram (EEG) spatial information in different cortical regions of the brain in brain-computer interface (BCI) systems. However, applying excessive channels is inconvenient for signal acquisition, and it may bring artifacts. To avoid these defects, the common spatial pattern (CSP) algorithm was used for channel selection and a selection criteria based on norm-2 is proposed in this paper. The channels with the highest M scores were selected for the purpose of using fewer channels to acquire similar rate with high density channels. The Dataset III a from BCI competition 2005 were used for comparing the classification accuracies of three motor imagery between whole channels and the selected channels with the present proposed method. The experimental results showed that the classification accuracies of three subjects using the 20 channels selected with the present method were all higher than the classification accuracies using all 60 channels, which convinced that our method could be more effective and useful.
Algorithms ; Brain-Computer Interfaces ; Electroencephalography ; Humans ; Pattern Recognition, Physiological

Objective To evaluate the predictive value of fracture risk assessment tool (FRAX) for determining fracture probabilities in middle-aged and elderly patients with type 2 diabetes.Methods Retrospective analysis was carried out on 153 type 2 diabetic patients aged over 50 years undergoing dual energy X-ray absorptiometry measurements.Fracture risk factors including age,gender,height,weight,body mass index,history of previous fragility fractures,parental history of hip fracture,history of smoking,excessive drinking,long-term use of steroid hormone,history of rheumatoid arthritis,the history of secondary osteoporosis diseases,and femoral neck T-score of bone mineral density (BMD) were recorded.FRAX scores with BMD (FRAX/BMD) and without BMD (FRAX/-) were calculated.Therapeutic interventions were recommended if the 10-year risk of fractures was more than 3％ for hip osteoporotic fractures and more than 20％ for other major fractures.Subjects were separated into the identical treatment recommendation group and the different treatment recommendation.Fracture risk factors were compared between groups.Results 133 (6.9 ％) patients had identical fracture risk predictions in the FRAX calculation,regardless of whether BMD join in or not.Age,gender and femoral neck T scores had significant differences between the two groups (all P＜0.001),while other risk factors had no statistical differences between the two groups (all P＞0.05).Conclusions In most middle-aged and elderly patients with type 2 diabetes,the FRAX/-provides the same prediction as FRAX/BMD value for predicting fracture risk,which shows that fracture risks can be predicted without bone density examination.The FRAX/-has higher predictive values on fracture for people who are younger,male,and has higher BMD.

Objective To evaluate the clinical performance of INNOVANCE D-Dimer,and provide information for clinical application.Methods 402 cases of sodium citrate anticoagulant blood were tested with INNOVANCE assay and PLUS assay on CA7000 analyzer to measure plasma D-Dimer levels.VIDAS-30 immunology analyzer was also used to validate the two assays.4 patients with elevated D-Dimer were monitored continuously during 5 days using INNOVANCE assay and PLUS assay respectively,then the consistency of trend between 2 assays was analyzed.Plasma specimens added with hemoglobin,bilimbin and triglyceride were used to verify the anti-interference capability of INNOVANCE D-Dimer assay.Results In 402 specimens,the result ranges of INNOVANCE D-Dimer and PLUS D-Dimer were [2.15 (0.33,8.63)]mg/L FEU and [325.50 (123.75,974.00)] μ,g/L DDU,respectively.The consistency between two assays was poor (Z =-17.375,P =0.000),especially the results in the range of PLUS D-Dimer (201-300) μg/L DDU and (301-400) μg/L DDU,the coincidence rates were only 25％ and 15％,respectively; the coincidence rate was up to 85％ during PLUS D-Dimer (500-600) μg/L DDU; the coincidence rate was close to 100％ when PLUS D-Dimer over 700 μg/L DDU.Totally 47 of 402 cases were unmatched between two assays.Verified by VIDAS 30,83.0％ (39/47) was false negative for PLUS assay,4.3％ (2/47) was false negative for INNOVANCE assay,12.7％ (6/47) was false positive for PLUS assay.There were 5 false positives and 39 false negative for PLUS assay,totally 45 cases; Two false negative for INNOVANCE assay.Four patients with elevated D-Dimer were monitored and the results showed similar trend between 2 assays.For INNOVANCE assay,the capacity of anti-interference to free bilirubin,unconjugated bilirubin,hemoglobin,and triglyceride was up to 217 μmol/L,337 μmol/L,41.04 g/L,18.35 mmol/L,respectively.Conclusions INNOVANCE assay can markedly reduce false negative results of D-Dimer compared with PLUS assay.INNOVANCE D-Dimer has good performance on anti-interference to jaundice,hemolysis and lipemia samples.

Objective To analyze the correlation between anterior circulation artery stenosis and lacune or lacunar infarct(LI) in elderly patients.Methods A retrospective analysis of data was performed in 111 patients with intracranial artery atherosclerosis,ischemic cerebral infarction or transient ischemic attack from January to December 2016 in our hospital.All the patients underwent non-contrast brain MRI or CT scan,as well as one-stop dynamic whole brain 4D CT angiography and CT perfusion scan(CTA-CTP/ perfusion).Imaging data were retrospectively analyzed.Intracranial 4D CTA was produced by using MIP and CPR post processing.The correlation of intracranial internal carotid artery(ICA)and middle cerebral artery (MCA)stenosis with lacunar infarct or lacune was analyzed by chi-square test using IBM SPSS Statistics 22.0 software.Results The average age of 111 patients was(68.4± 6.8)years.A total of 19 phases with 6080 images were obtained by one-stop scanning.The optimal phase of artery visualization was selected from 19 phases for evaluating artery stenosis.Intracranial ICA and/or MCA stenosis were revealed in 94 patients,including 73(65.8％)patients with LI or lacune and 21 patients(18.9％)without LI or lacune.17 patients without intracranial ICA or anterior circulation of MCA stenosis included 7 patients(6.3 ％)with LI or lacune and 10 patients(9.0％)without LI or lacune.Anterior circulation vessels stenosis was positively correlated with lacunar infarction or lacune(x2 =7.794,P=0.005).94 patients with anterior circulation vessels stenosis were further divided into 2 subgroups:unilateral and bilateral stenosis.39 cases showed unilateral vessels stenosis,including 25 cases (26.6 ％) with LI or lacunein,and 14 cases (14.9 ％) without LI or lacunein.And 55 cases showed bilateral vessel stenosis,including 48 cases (51.1％)with LI or lacune,and 7 case (7.4 ％) without LI or lacune.The risk for LI or lacunein was statistically higher in bilateral vessel stenosis than in unilateral vessel stenosis(x2 =7.061,P=0.008).Patients with anterior circulation vessels stenosis combined with LI or lacune were 73 cases,including 31 cases of grade Ⅰ,19 cases of grade Ⅱ,14 cases of grade Ⅲ,and 9 cases of grade Ⅳaccording to Trial criteria(NASCET)classification,with no significant difference between the different grades of anterior circulation vessels stenosis.Conclusions A correlation between ICA or MCA stenosis and lacunar infarction or lacune may exist.Risk for lacunar infarction or lacune is higher in patients with bilateral artery stenosis than in patients with unilateral artery stenosis.

As a new array processing technique, independent component analysis(ICA) is an effective means to resolve the blind source separation(BSS) problem. Based on the brief introductions of ICA theory and algorithm, we apply ICA to the removal of ocular artifacts from EEG recordings. The EEG data collected from the human scalp is actually the mixtures of some independent components. It is coincident with the basic assumptions of ICA. Compared with the traditional methods of artifacts elimination, ICA, a kind of spatial filter, is not restricted by the case of spectrum overlapping, and it has a good reservation of useful detail signals. In addition, the inverse weight matrix of ICA can be used to reflect the topographic structure of different independent sources of EEG.
Algorithms ; Artifacts ; Electroencephalography ; Eye Movements ; physiology ; Humans ; Signal Processing, Computer-Assisted

Objective To investigate the serum levels and clinical significances of microRNA-335 (miR-335) and microRNA-155 (miR-155) in patients with primary gallbladder cancer (PCG).Methods A total of 96 PCG patients (PCG group) and 50 healthy controls (control group) admitted to the Second People's Hospital of Hainan Province from January 2016 to October 2018 were selected.Real-time quantitative PCR (RT-PCR) was used to detect the serum levels of miR-335 and miR-155 in each group.The relationships between miR-335 and miR-155 levels and clinical pathological characteristics of PCG patients were analyzed.The diagnostic value of miR-335 and miR-155 in PCG was analyzed by ROC curve.Results The serum level of miR-335 in PCG group was significantly lower than that in the control group (1.50 ± 0.42 vs.3.65 ± 1.18,t =10.319,P ＜0.001).The serum level of miR-155 in PCG group was significantly higher than that in the control group (3.18 ±0.61 vs.0.74±0.12,t =13.627,P＜0.001).The serum levels ofmiR-335 and miR-155 in PCG patients were correlated with TNM stage (t =4.863,P =0.024;t =5.117,P =0.008) and lymph node metastasis (t =5.725,P ＜ 0.001;t =6.802,P ＜ 0.001).ROC curve analysis showed that the critical values of serum miR-335 and miR-155 for diagnosing PCG were 1.18 and 2.35,respectively.The area under the curve of the two combined diagnosis of PCG (0.920,95％ CI:0.863-0.977) was the largest,with sensitivity and specificity of 93.8％ and 85.7％.Conclusion The low serum level of miR-335 and high level of miR-155 are associated with the higher TNM stage and lymph node metastasis of PCG,and the combined detection of the two is helpful to improve the diagnostic rate of PCG.

In this paper an approach of time-window complexity sequence is applied to sleep EEG analysis. This approach can reduce the loss of state information due to the nonstationarity of EEG signal and the unevenness of state space, and can overcome certain limitations of the complexity itself to some extent. It will help to extract the state features of EEG in different sleep stages. In addition, we preprocess EEG by adopting ICA and wavelet transform (WT). The results show that some physiological artifact in EEG can be eliminated effectively by these methods, and the sleep staging based on sleep EEG data will be more exact.
Algorithms ; Brain ; physiology ; Electroencephalography ; Fourier Analysis ; Humans ; Nonlinear Dynamics ; Signal Processing, Computer-Assisted ; Sleep Stages ; physiology

Objective To analyze the clinical characters and identify the risk factors in patients diagnosed with systemic lupus erythematosus (SLE) and thrombotic thrombocytopenic purpura (TTP). Methods We retrospectively analyze the clinical features, laboratorial test results and treatment strategy of 20 SLE patients with TTP diagnosed in the First Affiliated Hospital of Zhengzhou University from 2011 to 2018. Multiple logistic regression model was used to determine risk factors for TTP. Results Among 20 SLE with TTP patients, 16 were female and 4 were male. The median age at diagnosis was 47 (14-74) years old. Three cases of TTP were diagnosed during the treatment of SLE, 16 cases were diagnosed after the diagnosis of SLE, while 1 case was diagnosed before SLE. Logistic analysis showed that the independent risk factors for TTP included Systemiclupus erythematosus disease activity index (SLEDAI)>10, renal and CNS involvement (P<0.05). Conclusion Patients with SLE who have moderate or high disease activity, renal and Central nervous system (CNS) involvement significantly increases the risk of TTP.

Objective To review the clinical characteristics and current management strategy and to examine the factors to be considered in the selection of treatment options for mitral regurgitation (MR) in elderly inpatients.Methods Elderly patients(≥60years old)who had been diagnosed with moderate to severe MR by transthoracic echocardiography and hospitalized from May 1,2014 to April 30,2015were included in this study (N=680).Patients were grouped according to therapy:the surgery group (n=372) and the medication group (n=308).Data at baseline including medical history and echocardiography were collected for comparison between the two groups and for analysis of factors associated with treatment choice.Results Of the 680 patients with moderate to severe MR,45.3％ were treated with medication.Compared with the surgery group,patients in the medication group were older,with a lower prevalence of primary MR,a higher prevalence of coronary heart disease and higher Euroscore-Ⅱ scores (all P＜0.01).Furthermore,the medication group had a lower prevalence of moderate MR(75/308 or 24.4％ vs.200/372 or 53.8％,P＜ 0.01),a lower left ventricular ejection fraction (47.8 ± 16.1) ％ vs (61.5 ± 9.2)％(P＜0.01),and a larger left ventricular end diastolic diameter(59.2±11.4)mmw (55.8±8.8)mm (P＜ 0.01).Besides,multivariable analysis revealed that regurgitation grade,left ventricular ejection fraction,multiple valve disease,age,and diabetes were correlated with therapy decisions(OR=62.067,1.089,4.791,0.879 and 0.414,respectively,P＜0.01 or P＜0.05).Conclusions Old age,impaired left ventricular ejection fraction,low regurgitation grade,diabetes,and absence of multiple valves are the most salientfactors for which surgery should not be selected.