Objective To establish an autoregression moving average (ARMA) model for predicting general traffic accidents and analyzing distributional difference on time series and frequency of common traffic accident so as to provide certain basis for a prediction model with better stability and accuracy. Methods The data of road traffic accidents in one newly developed zone of Chongqing in 2000-2005 were collected. The monthly distribution regularity of road traffic accidents was analyzed with descriptive epidemiologic method. ARMA model was set up for retrospective and prospective prediction. The predicted data were compared. Results Based on the characteristics of monthly distribution, the frequency of general traffic accidents in this area showed a cyclic fashion. The frequency of general traffic accidents predicted by ARMA model had over 80% of coincidence with the actual value. Conclusion The ARMA model can be used to predict the frequency of general traffic accidents, with better accuracy of short-term prediction than the long-term prediction.

OBJECTIVETo compare the diagnostic value of (18)F-FDG PET-CT with abdomen contrast CT in the diagnosis of peritoneal metastases.

METHODSBetween January 2008 and May 2011, imaging results of 97 patients with suspicious peritoneal metastases were retrospectively reviewed, and all the patients underwent both abdomen contrast CT and (18)F-FDG PET-CT imaging. Final diagnosis was made by histopathology or follow up.

RESULTSSeventy-seven patients were verified as peritoneal metastases after pathological examination(n=88) or follow up(n=9), while the other 20 patients were absent. The sensitivity of (18)F-FDG PET-CT was 90.9%(70/77), the specificity 85.0%(17/20), and the accuracy 89.7%(87/97). There were 3 false positive and 7 false negative. The sensitivity of contrast CT was 66.2%(51/77), the specificity 80.0%(16/20), and the accuracy 69.1%(67/97). There were 4 false positive and 26 false negative. The difference in diagnostic accuracy was statistically significantly between these two methods(P<0.05).

CONCLUSIONThe diagnostic value of (18)F-FDG PET-CT is significantly higher than that of abdominal enhanced CT for peritoneal metastases.

Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Male ; Middle Aged ; Peritoneal Neoplasms ; diagnostic imaging ; secondary ; Positron-Emission Tomography ; Retrospective Studies ; Sensitivity and Specificity ; Tomography, X-Ray Computed ; Young Adult

Objective To provide data for the control and prevention of hepatitis B and HBV surface antigen(HBsAg)status among the appliances and practitioners working in the public service places.Methods 63 beauty parlors,barber shops and bathing centers selected under stratified randomization sampling method and 682 workers were investigated through questionnaire.HBsAg from the appliances of the public service places and employee was detected by RIA.Results Two main sanitizing modes that including alcohol cleaning(34.60%)and ultraviolet light disinfection(30.79%)were used.The rates of testing on HBsAg among the appliances were 2.13% at the public service places,and were 0.63%,2.67% and 3.70% in large-.medium-and small-sized appliances respectively.The rate of testing on HBsAg on large-,medium-and small-sized appliances were statistically different(χ2=6.68,P＜0.05).The positive rates of HBsAg on the appliances of beauty parlors,barbering shops and footbath inns were 2.97%,0.61% and 3.42% respectively.People working in different service sites had different rates of HBsAg:those who worked at the‘acne needle'and the forceps were 5.13% and 4.17%.The positive rate of HBsAg among the workers in the public service places was 7.13%.The rates of HBsAg among the workers in large-,medium-and small-sized public service places were 7.34%,8.33% and 2.94% respectively.The rates of HBsAg among the workers in beauty parlors,barbering shops,footbath inns and bathing centers were 9.01%,6.37%,4.35% and 7.29% respectively.HBsAg positive rates were different among the workers working at different service sites:13.33% at tattoo business.12.68% in pedicures workers and 8.03% in massagists.Conclusion It is important to improve the sanitizing management of the appliances used in the public service places and to improve the knowledge,attitude,as well as practice of vaccination on hepatitis B among those populations.

OBJECTIVES: To investigate the clinical treatment outcomes and the changes of the outcomes over time in extremely preterm twins in Guangdong Province, China. METHODS: A retrospective analysis was performed for 269 pairs of extremely preterm twins with a gestational age of <28 weeks who were admitted to the department of neonatology in 26 grade A tertiary hospitals in Guangdong Province from January 2008 to December 2017. According to the admission time, they were divided into two groups: 2008-2012 and 2013-2017. Besides, each pair of twins was divided into the heavier infant and the lighter infant subgroups according to birth weight. The perinatal data of mothers and hospitalization data of neonates were collected. The survival rate of twins and the incidence rate of complications were compared between the 2008-2012 and 2013-2017 groups. RESULTS: Compared with the 2008-2012 group, the 2013-2017 group (both the heavier infant and lighter infant subgroups) had lower incidence rates of severe asphyxia and smaller head circumference at birth (P<0.05). The mortality rates of both of the twins, the heavier infant of the twins, and the lighter infant of the twins were lower in the 2013-2017 group compared with the 2008-2012 group (P<0.05). Compared with the 2008-2012 group, the 2013-2017 group (both the heavier infant and lighter infant subgroups) had lower incidence rates of pulmonary hemorrhage, patent ductus arteriosus (PDA), periventricular-intraventricular hemorrhage (P-IVH), and neonatal respiratory distress syndrome (NRDS) and a higher incidence rate of bronchopulmonary dysplasia (P<0.05). CONCLUSIONS There is a significant increase in the survival rate over time in extremely preterm twins with a gestational age of <28 weeks in the 26 grade A tertiary hospitals in Guangdong Province. The incidences of severe asphyxia, pulmonary hemorrhage, PDA, P-IVH, and NRDS decrease in both the heavier and lighter infants of the twins, but the incidence of bronchopulmonary dysplasia increases. With the improvement of diagnosis and treatment, the multidisciplinary collaboration between different fields of fetal medicine including prenatal diagnosis, obstetrics, and neonatology is needed in the future to jointly develop management strategies for twin pregnancy.
Bronchopulmonary Dysplasia/epidemiology* ; Female ; Gestational Age ; Humans ; Infant ; Infant, Extremely Premature ; Infant, Newborn ; Pregnancy ; Respiratory Distress Syndrome, Newborn/epidemiology* ; Retrospective Studies ; Treatment Outcome

Heme/metabolism* ; Cryoelectron Microscopy ; Membrane Transport Proteins ; Escherichia coli Proteins/metabolism*