Objective:To describe the secular trends of premarital medical examination ( PME ) in China during 1996 and 2013 and to assess the impacts of national health policies on the PME rate. Methods:The information on marriage and PME for districts and counties in 31 provinces of China was annually collected by the Office for National Maternal & Child Health Statistics of China, and the infor-mation on the health policies was from official governmental websites. According to the main health poli-cies, the calendar years were categorized into 3 periods:1996 to 2003 was mandatory PME period;2004 to 2008 was encouraged voluntary PME period; and 2009 to 2013 was free-paid voluntary PME period. Results: During the 18-year period, 284 242 719 people were registered for a marriage in which 107 198 795 were examined, giving the PME rate of 37. 7%. During the mandatory PME period, the rate ranged 52 . 7% -67 . 7% with an average of 60 . 9% ( urban 71 . 5%, and rural 51 . 7%) . In 2004 , the first year when the PME became voluntary, the rate was abruptly dropped to 2. 6%, and thereafter gradually increased to 11 . 5% in 2008 . As the policies of the free-paid voluntary PME were subsequently issued, the rate was quickly increased to 52. 3% (urban 49. 8%, and rural 54. 6%) in 2013. The in-creasing trend was consistently observed both in urban and rural areas, and across East, Middle, West, and Northeast economical regions. However, the rates differed greatly among provinces. In 2013, 5 pro-vinces had rates of >90% ( Guangxi 97 . 5%, Fujian 96 . 0%, Ningxia 95 . 4%, Zhejiang 93 . 4% and Anhui 90. 1%), whereas some provinces were stuck at a low rate, including developed and underdeve-loped provinces/cities. The PME rate in 2013 was 27. 4% for Shanghai, 25. 5% for Guangdong, 12. 4%for Chongqing, 5. 8% for Beijing and 4. 6% for Tianjin. Underdeveloped provinces were Guizhou (6. 4%) and Qinghai (1. 8%). Conclusion:As various national policies to promote voluntary PME were issued, the PME rate was significantly increased after a sharp decline, though it varied greatly by provinces. For provinces with high PME rate, PME-related health benefits need to be evaluated;for provinces with low rate, it is of important practical significance to explore a cost-effective health service model that is likely incorporated with pre-pregnancy examination.

Objective To study the risk factors of delayed gastric emptying (DGE) after pancreaticoduodenectomy (PD).Methods Between Ja(n)uary 1st 2013 and December 31st 2013,data from 196 consecutive patients who underwent PD at the Chinese PLA General Hospital were studied retrospectively.17 factors were examined.Univariate analysis and multivariate logistic regression analysis were used to determine the relative risks.Results DGE occurred in 71 patients (36.2％).The incidences of grade A,grade B and grade C DGE were 22.4％ (44/196),6.1％ (12/196) and 7.7％ (15/196) respectively.There were three postoperative deaths.The overall mortality rate was 1.5％.BMI,Braun anastomosis,clinically relevant postoperative pancreatic fistula (CR-POPF) and intra-abdominal collection were significantly correlated with DGE on univariate analyses.BMI ≥25 kg/m2,CR-POPF,and intra-abdominal collection were independent risk factors on univariate and multivariate regression analyses.Conclusions Post-operative complications were associated with DGE.Early diagnosis and timely treatment for pancreatic fistula and abdominal collection were helpful to decrease morbidity and to promote recovery of DGE.

Objective For decreasing the infected rate,the prevention and cure methods of intracranial infections following posterior fossa craniotomy were study. Methods Twenty-eight patients with the intracranial infections following posterior fossa craniotomy were examined by lumbar puncture,and analyzed cerebrospinal fluid with routine examination and reference to the bacteriological data and drug sensitive tests. All the patients were treated with high dosage sensitive antibiotics, and draining continually the infected cerebrospinal fluid by lumbar puncture catheterization and injected small dosages of antibiotics into intraspinal for most cases. Results Twenty-eight patients had intracranial hypertension by lumbar puncture examination, outcome of cerebrospinal fluid culture indicated that 17 cases had bacteria growth and 11 cases had no bacteria. The intracranial infection was controlled effectively,and 96.4%(27 cases) were cured, 1 case dead of systemic failure. Conclusions Strict aseptic techniques,reduce operative time,decrease intracranial place of foreign matters, such as gelfoam, hemostatic gauze and artificial implants, could reduce the possibilities of intracranial infections. Appropriate antibiotics selection,lumbar puncture catheterization and intraspinal administration of antibiotics can cure intracranial infections effectively.

Epidemiology is a discipline characterized by complicated theory and practice.How to make the practice course function better is a topic worthy of exploring in educational reform for clinical students.The article explored the‘Student-Dominated’ Model based on ‘Problem-Based Learning ’ and ‘Team Based Learning ’ in teaching process and compared the model with the traditional one ( Teacher-Dominated Model) .Suggestions were given to further improve effectiveness of epidemiology practice courses.

[ABSTRACT]OBJECTIVETo study of the relationship of age and climate with the nasal mucosa lesions.METHODSAll the patients met with the inclusive criteria were registered and followed-up once a month and their nasal mucosal lesions were observed through nasal speculum and/or nasal endoscope. The recording data was analyzed by SPSS17.0 software.RESULTSA total of 259 patients, 555 person-times and 957 lesion spots were observed. The nasal mucosa was injured by airflow with the highest incidence rate from October to next year April. Patients numbers gradually increased after August, and significantly increased at November, December (P<0.05). Children aged from 2 to 12 years old and the adults aged from 40 to 80 years old were susceptible population (P<0.05), the incidence rate had a negative relation with humidity (P<0.05). The susceptible spots of the lesion were ranked as follows: Little area, inferior turbinate, mucosa of the both side of the deviated nasal septum, inferior meatus, middle meatus, middle turbinate and olfactory area. CONCLUSIONNasal mucosal injury relates to age and seasons. The nasal cavity airflow may be a factor of these lesions.

OBJECTIVE: To explore the organ damage character and complications of blunt trauma in the neck, and the advantage and disadvantage of CT and ultrasound for blunt trauma in the neck. METHOD: The data of 7 neck blunt trauma cases was analyzed. Cricoarytenoid joint reduction, tracheotomy, exploratory surgery of neck were performed respectively for these cases. RESULT: Of the 2 cases with vocal cord paralysis, one had his vocal cords fixed in the the para-median position. one had his vocal cords move freely. 2 cases of epiglottis edema had been cured. Among the 2 cases of thyroid area swelling and congestion, one died from respiratory failure, one was cured. One case died of carotid artery embolism. CONCLUSION Circulation of the head should be noticed as well as keeping respiratory tract clear and anti-shock treatment. Some patient with negative laryngeal examinations might get worse in the following hours, and swelling of the neck, dyspnea, obnubilation may appear in these cases. Dynamic monitoring could be helpful for the diagnosis and treatment of neck blunt trauma.
Adult ; Humans ; Male ; Middle Aged ; Neck Injuries ; complications ; diagnosis ; therapy ; Retrospective Studies ; Wounds, Nonpenetrating ; complications ; diagnosis ; therapy ; Young Adult

Objective: To investigate the relationship between the epidemic of Coronavirus Disease in 2019 (COVID-19) in China and population migration from Wuhan before the city implemented strict migration restrictions. Methods: We collected the cumulative number of confirmed cases with COVID-19 up to January 31, 2020 from the official website of the health administrative departments, and information on population migration out of Wuhan during January 10, 2020 and January 24, 2020, approximately half months prior to the implementation of strict migration restrictions by the city, from Baidu population-migration big data platform. Population migration data were provided for the top 100 cities in the form of percentage values, calculated as the number of migrants from Wuhan into these cities divided by the total number of migrants out of Wuhan during the same period multiplied by 100%. The two-independent sample non-parametric Wilcoxon rank-sum test was used to compare the distribution of cumulative number of cases between the top 100 cities and the remaining 205 non-top 100 cities of China. The relationship between the cumulative number of cases and the percentage of migrants from Wuhan into the top 100 cities were further assessed by Pearson correlation and by multiple linear regression with adjustment for population size, population density, and GDP per capita. Results: The top 100 cities accounted for 91.6% of total migrants out of Wuhan, and the top 14 cities were all in Hubei province. There were a total of 5,869 cases in the top 100 cities, with a median (interquartile range) of 21.5 (12~55) cases, whereas in the 205 non-top 100 cities there were a total of 1,063 cases, with a median (interquartile range) of 4 (2~7) cases. The median cumulative number of cases differed significantly between the two types of cities (P<0.001). Among the top 100 cities, there was a strong correlation between the percentage of migrants from Wuhan and the cumulated number of cases (Pearson correlation coefficient=0.92), and for every 1 percentage point increase in migrants from Wuhan the cumulative number of cases increased by approximately 42 (95%CI, 39 to 45). The number of cumulative number of cases in Wenzhou and Chongqing was detected as potential outliers in regression diagnosis (P<0.001, corresponding standardized residuals were 5.2 and 3.5, respectively), suggesting that the number of cases in these two cities was substantially higher than others with similar amount of migrants from Wuhan. Conclusions There is a strong positive association between the percentage of migrants from Wuhan and the epidemic status of COVID-19 infections in cities in China.

Objective: To analyze the factors related to dual use of traditional cigarettes and e-cigarettes among middle school students in Beijing, in order to provide a scientific basis for adapting to the new situation and carrying out tobacco control among adolescents. Methods: A multi stage cluster random sampling method was used to select 15 688 and 13 607 junior and senior middle school students from 16 districts in Beijing from April to June in 2019 and 2023, respectively. Online self administered questionnaires among middle school students in Beijing were completed, including use of traditional cigarettes and e-cigarettes, exposure to second hand smoke, attitudes and perceptions towards tobacco, etc. The Chi-square test was used to compare rates, and a multiple factors Logistic regression model was used to analyze related factors of traditional cigarettes and e-cigarettes dual use among middle school students. Results: The dual use rate of traditional cigarettes and e-cigarettes in 2023 had decreased to 2.46% from 4.88% in 2019 among middle school students in Beijing. The results of the multiple Logistic regression model analysis showed that among middle school students, tobacco control anywhere at home (boys: OR =0.47, girls: OR =0.34), without anyone smoking on campus in the past month (boys: OR =0.43, girls: OR =0.26) had lower risks of dual use ( P <0.05); and middle school students strongly or slightly agreeing that smoking could bring happiness (boys: OR =4.11, 2.22, girls: OR =5.32, 3.87), believing that smoking could increase attractiveness of young people (boys: OR =3.13, girls: OR =5.81), smoking cigarettes handed over by good friends (boys: OR =4.24, girls: OR =7.21), thinking smoking in the next year (boys: OR =5.77, girls: OR =7.74) had higher risks of dual use ( P <0.05).Among boys, junior middle school students ( OR =0.50), excellent academic performance ( OR =0.36), no acceptance of free tobacco products from tobacco companies ( OR =0.38), believing that smoking couldn t refresh oneself ( OR =0.37) and smoking still could pose a health hazard though not yet addictive ( OR =0.32) had lower risks of dual use ( P <0.05);and boys with a history of secondhand smoke exposure indoor outside home ( OR =2.19), believing that quitting smoking without difficulty ( OR =2.57),smoking e-cigarettes handed over by good friends ( OR =11.27) had higher risks of dual use ( P <0.05). Among girls, no acceptance of using tobacco product labeled items ( OR =0.28) had lower risks of dual use ( P <0.05); and girls whose parents both smoke ( OR =5.53), believing that quitting smoking might not be difficult ( OR =4.44) had higher risks of dual use ( P < 0.05 ). Conclusions The dual use rate of traditional cigarettes and e-cigarettes among middle school students in Beijing has decreased. It is recommended to take the construction of smoke free families as the starting point, so as to reduce indoor second hand smoke exposure and control tobacco promotions, and promote the formation of correct tobacco control culture and moral constraints among secondary school students.

OBJECTIVE: To improve the diagnostic and therapeutic efficiency for secondary laryngeal tuberculosis through an analysis on the clinical features of patients with this disease. METHOD: A retrospective study was made among 49 cases with laryngeal tuberculosis treated in Tibetan General Hospital of Chinese PLA, and the clinical data were carefully analyzed to summarize the clinical experience of this disease. RESULT: Of 49 patients, 24 cases had 1 year history, 11 cases had 1 to 3 years, 9 cases had 3 to 5 years, 5 cases had 5 years or more. Thirty-eight patients had the history of tuberculosis and 11 had none. Thirty-four patients had taken anti-tuberculosis drugs but none had standard therapy as demanded. All cases had mild general symptoms (mild fever, night sweats, weight loss, et al) and atypical local symptoms (hoarseness, sore throat). Therefore, 42 cases were misdiagnosed as non-specific chronic laryngitis, of which 15 cases got worse after oral administration or inhaling of steroid hormones. Seven persons were misdiagnosed as laryngeal cancer. All patients were confirmed pulmonary tuberculosis by X ray exam or CT scanning. Twelve cases had strong positive PPD tests and 2 cases were detected positive by sputum smear. All patients was treated by standard systematic and local chemical therapy against tuberculosis (inhaling of antituberculosis drugs for 1 to 2 months). All were cured but one died in a road accident, and none had recurrence after 1- to 9- year follow-up. CONCLUSION All of those the patients with long period hoarseness and sore throat should take chest CT scan or X-ray exam for the highest incidence of pulmonary tuberculosis at high altitudes. CT scanning is the prefer for its high resolution. Pathological biopsy and diagnostic therapy should be taken to make accurate diagnosis. Usually steroid hormones should not be recommended.
Adolescent ; Adult ; Aged ; Altitude ; Child ; Female ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Tibet ; Tuberculosis, Laryngeal ; diagnosis ; drug therapy ; Young Adult

Objective: To compare the staining effect of coffee and red tea to the different denture base materials, and to investigate the cleaning efficacy of four denture cleansers. Methods : All samples were separately soaked in 1％NaClO、 Efferdent、 Polident partial and Polident overnight for 12 times within 12 days after staining by the coffee and red tea. Then, the color values of the samples were measured by the spectrocolorimeter. Results : The staining effect between coffee and red tea in the two materials was statistically significant (P < 0.05); the invisible denture materials are easily colored than heat-curing denture base resins (P < 0.05); there was also a statistical difference in the cleaning effect of the denture cleaning agents at each cycle stage (P < 0.05); the trend is different in different phases of color difference (ΔE) (P < 0.05). Conlusion Compared with the Polident partial, the cleaning efficacy of 1％NaClO、Efferdent and Polident overnight were better.