1.Spatiotemporal distribution characteristics of and trends in disease burden of dengue fever in China from 2005 to 2024
Lianfang FENG ; Meng SHANG ; Jiarong REN ; Xiaoxu WANG ; Haoqiang JI ; Xinning HAO ; Jing LI ; Qiyong LIU
Chinese Journal of Schistosomiasis Control 2026;38(2):137-147
Objective To analyze the spatiotemporal distribution characteristics of and trends in the disease burden of dengue fever in China from 2005 to 2024, so as to provide insights into formulation of dengue fever control strategies. Methods Data pertaining to dengue fever cases in China from 2005 to 2024 were retrieved from the Infectious Disease Reporting Information System of Chinese Center for Disease Control and Prevention, and city population, gross domestic product (GDP), GDP per capita, and consumer price index in China were captured from the China Statistical Yearbook, National Bureau of Statistics of China, the China City Statistical Yearbook, and bureaus of statistics in each city. The disability-adjusted life years (DALYs), years of life lost (YLLs), and years lived with disability (YLDs) due to dengue fever were calculated in China from 2005 to 2024. The direct and indirect economic burdens of dengue fever were estimated to calculate the total economic burden. The trends in the disease burden of dengue fever were estimated in China from 2005 to 2024 using a Joinpoint regression model with the software Joinpoint 4.9.0.0, and the average annual percent change (AAPC) and its 95% confidence interval (CI) were calculated. In addition, the DALYs rate and economic burden of dengue fever in China were subjected to global and local spatial autocorrelation analyses using the software ArcGIS 10.8. Results The gross DALYs due to dengue fever were 5 558 person-years in China from 2005 to 2024, and the DALYs of dengue fever increased from 36 person-years in 2005 to 899 person-years in 2024, with an increase of 23.97 folds. The average annual DALYs rate of dengue fever was 0.02 person-years/105 in China during the 20-year study period from 2005 to 2024, and the DALYs rate peaked in 2014 (0.13 person-years/105) and reduced during the COVID-19 pandemic from 2020 to 2022. YLDs were the main contributor of DALYs due to dengue fever in China from 2005 to 2024, with a total of 5 354 person-years, accounting for 96.33% (5 354 person-years/5 558 person-years) of the gross DALYs. The gross DALYs of dengue fever were 2 982 person-years among men (53.66%) and 2 575 person-years among women (46.34%) in China from 2005 to 2024, and high DALYs of dengue fever were measured among residents at ages of 15 to 30 years (1 639 person-years), 30 to 45 years (1 857 person-years), and 45 to 60 years (1 204 person-years), respectively, accounting for 84.56% (4 700 person-years/5 558 person-years) of total DALYs due to dengue fever in China. The total economic burden of dengue fever was estimated to be 612 million Yuan in China from 2005 to 2024, with an average annual economic burden of 30.584 million Yuan. The economic burden of dengue fever increased from 196 000 Yuan in 2005 to 121 million Yuan in 2024 in China, with an increase of 616.35 folds, and the per capita economic burden increased from 3 322.21 Yuan in 2005 to 4 940.01 Yuan in 2024, with an increase of 48.70%. Dengue fever cases were reported in 274 cities (counties) across 31 provinces (autonomous regions, municipalities) in China from 2005 to 2024, with relatively higher DALYs in Guangdong Province and Yunnan Province. Spatial autocorrelation analysis revealed that the disease burden of dengue fever appeared positive aggregation in Chinese cities (counties) from 2005 to 2024 (global Moran’s I = 0.045, Z = 2.24, P < 0.05), with high-high clusters mainly concentrated in the Pearl River Delta region in Guangdong Province and Xishuangbanna Dai Autonomous Prefecture and Pu’er City in Yunnan Province, and the total economic burden (global Moran’s I = 0.032, Z = 9.55, P < 0.001), per capita economic burden (global Moran’s I = 0.208, Z = 27.34, P < 0.001), and the proportion of total economic burdens in GDP in 2024 (global Moran’s I = 0.017, Z = 5.91, P < 0.001) all presented positive aggregation, with relatively higher total economic burdens mainly concentrated in Guangdong Province and Yunnan Province. Joinpoint regression analysis showed that the gross DALYs rates of dengue fever appeared an overall tendency towards a rise in China from 2005 to 2024 (AAPC = 16.24%, P = 0.029), and the DALYs rate presented an overall tendency towards a rise among both men (AAPC = 14.75%, P = 0.028) and women (AAPC = 14.93%, P = 0.037) during the study period. The per capita direct economic burden appeared an overall tendency towards a rise among dengue fever patients in China from 2005 to 2024 (AAPC = 2.16%, P = 0.012); however, there was no significant difference in the trends in the per capita indirect economic burden (AAPC = 0.46%, P = 0.470). In addition, the DALYs rate of dengue fever appeared a tendency towards a rise in 84.67% (232/274) of cities (counties) in China from 2005 to 2024, and the per capita economic burden appeared a tendency towards a rise in 85.40% (234/274) of cities (counties), while the DALYs rate and per capita economic burden of dengue fever appeared a tendency towards a rise in 77.01% (211/274) of cities (counties). Conclusions The disease burden of dengue fever significantly increased in China from 2005 to 2024. It is recommended to reinforce integrated dengue fever control in high-risk areas and among high-risk populations, and to improve the surveillance of imported dengue fever cases and vector control.
2.Evaluation value of tissue doppler imaging Tei index on myocardial injury degree and right cardiac function after neonatal asphyxia
Jianwei JI ; Lianfang YANG ; Xiangying GONG
Chinese Journal of Primary Medicine and Pharmacy 2020;27(15):1845-1848
Objective:To evaluate the clinical value of tissue doppler imaging Tei index in evaluating the degree of myocardial injury, right cardiac function after neonatal asphyxia.Methods:From March 2018 to May 2019, 62 cases of neonatal asphyxia hospitalized in the undergraduate department of Yiwu Central Hospital were classified as asphyxia group.According to Apgar score of birth, they were further divided into 41 cases of mild asphyxia group, 21 cases of severe asphyxia group.And 30 healthy full-term neonates delivered in our Hospital during the same period were selected as normal control group.The Newborn's Tei index, as well as the different severity asphyxia neonatal serum myocardial injury indicators[amino terminal brain natriuretic peptide(NT-proBNP), troponin(cTn-Ⅰ), creatine kinase isoenzyme(CK-MB), lactate dehydrogenase(LDH)], ultrasonic right heart function parameters[right ventricular ejection fraction(RVEF), E, A value and E/A ratio] were compared.Pearson test was used to evaluate the correlation between Tei index, myocardial injury indicators and right cardiac function parameters in neonatal asphyxia cases.Results:The Tei index of the asphyxiation group was (0.38±0.05), which was higher than (0.27±0.04) of the control group ( t=10.521, P<0.05), and the Tei index of the severe asphyxiation group was (0.43±0.06), which was higher than (0.34±0.05) of the mild asphyxiation group ( t=6.264, P<0.05). In neonatal asphyxia cases, the NT-proBNP, cTnI, CK-MB, LDH levels in the severe asphyxia group were (1 164.27±231.64)ng/L, (0.33±0.05)μg/L, (27.11±3.65)U/L, (298.20±37.57)U/L, respectively, which were higher than those in the mild asphyxia group [(590.38±73.91)ng/L, (0.25±0.04)μg/L, (18.36±2.34)U/L, (200.71±24.39)U/L] ( t=14.576, 6.839, 11.463, 12.338, all P<0.05). The ultrasonic RVEF level, E/A ratio in the severe asphyxia group were (52.94±6.10)%, (0.94±0.11), respectively, which were lower than those in the mild asphyxia group [(56.83±5.97)%, (1.02±0.13)] ( t=2.411, 2.547, all P<0.05). Correlation analysis found that Tei index was positively correlated with NT-proBNP, cTn-Ⅰ, CK-MB, LDH levels, and negatively correlated with RVEF level, and positively correlated with E/A ratio in neonatal asphyxia cases( r=0.745, 0.598, 0.703, 0.665, -0.711, -0.692, all P<0.05). Conclusion:Abnormal increasing of Tei index in neonatal asphyxia cases can objectively reflect the extent of myocardial injury and right heart function decline in children.
3.Analysis and thinking of the test papers of neurology for five-year program clinical medicine education
Lianfang YUAN ; Jing YANG ; Hua WANG ; Xiubo FAN ; Zhi JI ; Yuxin LI
Chinese Journal of Medical Education Research 2011;10(3):261-264
In order to understand the students'knowledge mastery,assess teaching effects and improve the quality of teaching,this article analyzed the test papers of Neurology among the five-year program clinical medicine students of Grade 2006 in our College.The results indicated that the mean score of the exam was 87.29 with a standard deviation of 7.90.The distribution was negatively skewed.The degree of difficulty was 0.78 and the discrimination is 0.19.The reliability was 0.59.It demonstrated that the test papers had a good reliability,the design of the test papers was too easy and could not reasonablely discriminate the degree in evaluating the students'mastery of the course.Therefore,we shoud pay attention to appropriate difficulty and ensare quality in preparing test papers to scientifically evaluate teaching quality.
4.Percutaneous transhepatic stent angioplasty for portal vein stenosis after liver transplant
Guang CHEN ; Haijun GAO ; Yingxiu LIU ; Lianfang WEN ; Chenghong TONG ; Ji QI
Chinese Journal of Radiology 2009;43(11):1170-1172
Objective To evaluate the therapeutic results of percutaneous transhepatic stent angioplasty for portal vein stenosis following liver transplant.Methods From 2005 to 2007,7 patients developed portal vein stenosis following liver transplant.Percutaneous transhepatic stent angioplasty of the portal vein was performed in all patients.The therapeutic results were monitored by clinical follow-up and imaging examination.Results In seven patients,the percutaneous transhepatic stents were placed successfully.The follow up period ranged from 3 months to 34 months.Portal venous patency Was maintained in six patients(one patient died due to hepatic arterial thrombosis and ischemic insult to bile duct at three months following the stent placement).No complications due to stent angioplasty occurred.Conclusion Percutaneous transhepatic stent angioplasty is an effective and safe method for treatment of portal vein stenosis following liver transplant.
5.Pharmacognostic Studies on Jinxianlian Ⅰ. Bencaologic Review, Resource Survey and Taxonomic Identification
Chun ZLLENG ; Yizhong HUANG ; Lianfang JI
Chinese Traditional and Herbal Drugs 1994;0(03):-
Result of the present study showed that Anoectochilus roxburghii (Wall. )I,indl. is the genuine speciescurrently used as folk medicine, while A, formosanus Hayata. is a different species with the same name ofJinxianlian. trhe distribution and ecological environment of Jinxianlian were described and an index of eightspecies of Anoectochilus Bl. were listed to distinguish their maln eharacteristic differences.

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