China ; epidemiology ; Humans ; Incidence ; Liver Neoplasms ; epidemiology ; mortality

Recent years, the development of medical devices kits is rapid. How to make the technical evaluation of medical devices kits more perfect bases on the two major principles of safe and effective, and to make kits in the market more normative and orderly, these issues for technical evaluation have to be considered. This article makes a study on current situation of production, classification of management and registration status, combined with existing regulations and related standards, and discusses technical evaluation related issues.
Equipment and Supplies ; standards

Objective:The aim of the current study is to understand the sleep disorders in children with autism and related factors.Methods:A case-control study method was conducted in this study which included 198 children autism who met the criteria of the Diagnostic and Statistical Manual of Mental Disorders,Fourth Edition (DSM-Ⅳ) and 233 cases of gender-and age-matched normal children.Their general demographic and sleep data were collected and the children with autism were assessed with Autism Behavior Checklist,Child Behavior Checklist and Autism Spectrum Screening Questionnaire.Correlation analysis and regression analysis were performed to compare sleep quality,sleep problems and the related factors of the two groups.Results:The scores of difficulty falling asleep,sleep restlessness,taking hold or shaking,restless sleep,interrupted sleep,nightmares,sleepwalking,night terrors,sleep snoring,nocturnal enuresis,sleep apnea,mouth breathing,sweating and sleep scores were higher in the autism group compared to the normal control group before falling asleep (P ＜ 0.05),while the proportion of daytime sleep time in the autism group was lower than the normal control group (P ＜0.05).With sleep status as dependent variable,linear regression analysis was conducted with children's birth weight,walking month age,speaking month age,father age,and autism spectrum as independent variables.The multiple linear regression analysis showed the scores of,sensory behaviors,body and object use behaviors,and self-help behaviors in Autism Behavior Checklist for autistic children were positively associated with their sleep (β =0.21,0.21,0.29,P ＜ 0.05).However,paternal age at birth in the autism group had negative associatin with the sleep of autistic children (β =-0.16,P ＜0.05).In the autism group,their total scores of Autism Behavior Checklist and the scores of language and social behavior in Autism Behavior Checklist were not associated with their sleep status score (P ＞ 0.05).Conclusion:It suggests that children with autism may have more sleep problems,and their sleep problems are related to autism symptoms including the scores of,sensory behaviors,body and object use behaviors,and self-help behaviors in Autism Behavior Checklist for autistic and their paternal age at birth.

OBJECTIVETo assess the impact of stomach cancer on the Chinese population by epidemiological analysis of its mortality distribution.

METHODS1990-1992 data on stomach cancer mortality collected by sampling survey involved one tenth of the total Chinese population.

RESULTSThe crude mortality rate of stomach cancer in China was 25.2 per 10(5) (32.8 per 10(5) for males and 17.0 per 10(5) for females), which comprised 23.2% of the total cancer deaths from 1990 to 1992, making stomach cancer the leading cause of cancer death. The stomach cancer mortality rate of males was 1.9 times of that of females. The Chinese mortality rates of stomach cancer adjusted by the world population were 40.8 per 10(5) and 18.6 per 10(5) of males and females, which were 4.2-7.9 (of males) and 3.8-8.0 (of females) times of those in the developed countries. Age-adjusted mortality rates of stomach cancer in China have distinct geographical difference: form the lowest 2.5 per 10(5) to the highest 153.0 per 10(5) in the 263 surveyed localities, 15.3 per 10(5) in urban areas and 24.4 per 10(5) in rural areas giving a difference of 1.9 times.

CONCLUSIONThe prevention and treatment of stomach cancer in China, especially in the countryside and the under-developed areas in the northwest, should be a long-term focus in control of cancers of the digestive system. Urgent measures for prevention and early detection of stomach cancer should be taken.

Adolescent ; Adult ; Age Distribution ; Aged ; Aged, 80 and over ; Child ; Child, Preschool ; China ; epidemiology ; Female ; Humans ; Infant ; Infant, Newborn ; Male ; Middle Aged ; Mortality ; Sex Factors ; Stomach Neoplasms ; epidemiology ; mortality

Objective To explore the differences between baduanjin and ninth set of broadcast gymnastics in their own pulse parameters before and after intervention for 12 weeks,and to provide objective indicators for the function of Baduanjin from the perspective of pulse diagnosis.Methods 60 healthy subjects were recruited,and 50 subjects were finally included according to the dropout criteria.The subjects were divided into the experimental group and the control group by the random number table method,and different interventions were adopted.Then,the pulse diagnosis of the two groups of subjects was collected,and the impact of the interventions on the viscera was judged by analyzing the Pulse Graph Parameters and contribution.Results The characteristic parameters of the experimental group include 8 time domain parameters(left Chi,left Guan,right Cun,etc.)and 9 frequency domain parameters(left Guan,left Chi,right Guan,etc.),which are mainly distributed in the left Cun,left Guan,left Chi,and right Guan;the characteristic parameters of the control group included 6 time domain parameters(left Cun,left Guan,right Chi,etc.)and 11 frequency parameters(left Guan,left Chi,right Guan,etc.),which were mainly distributed in left Chi,right Chi,and left Guan.Conclusion Practicing Baduanjin can significantly affect pulse diagram,and the accuracy and specificity after intervention are higher than those of the control group.Baduanjin has a certain influence on the circulation of qi and blood in the human meridians,and its mechanism of action may be related to affecting the overall circulation of qi and blood.In the experimental group,Baduanjin had a significant effect on the heart,liver,gallbladder,and kidneys,while the control group had the most obvious changes in the kidneys.For the overall intervention and coordination of the viscera,the Baduanjin group had better effects than the ninth broadcast gymnastics group.