1.Comparison of the prediction effects of LSTM, SARIMA and SARIMAX models on the incidence of hand, foot, and mouth disease
ZHANG Xiaoqiao ; ZHANG Xiaodie ; ZHAO Zhenxi ; XIE Pengliu ; DAI Min
Journal of Preventive Medicine 2025;37(3):280-284,287
Objective:
To compare the effects of seasonal autoregressive integrated moving average (SARIMA) , seasonal autoregressive integrated moving average with exogenous regressors (SARIMAX) and long short-term memory neural network (LSTM) models in predicting the incidence of hand, foot, and mouth disease (HFMD).
Methods:
Monthly incidence data of HFMD in Kunming City from 2010 to 2019 were collected. SARIMA, SARIMAX and LSTM models were established using the monthly incidence of HFMD from 2010 to 2018 to predict the monthly incidence of HFMD from January to December 2019. The prediction performance of the three models was compared using mean squared error (MSE), root mean squared error (RMSE), mean absolute error (MAE) and mean absolute percentage error (MAPE). The optimal prediction model was selected based on the principle of minimizing MSE, RMSE, MAE and MAPE.
Results:
The HFMD cases were reported every month in Kunming City from 2010 to 2019, with the incidence fluctuating between 188.27/105 and 363.15/105. The disease exhibited a biennial high-incidence bimodal distribution. Among the four evaluation indicators for the training and testing sets, the LSTM model had the smaller values: MSE was 63.182 and 102.745, RMSE was 7.949 and 10.136, MAE was 6.535 and 7.620, and MAPE was 46.726% and 31.138%. The LSTM model performed the better, followed by the SARIMA model, while the SARIMAX model had the relatively poorest performance.
Conclusion
The LSTM model outperforms the SARIMA and SARIMAX models in predicting the incidence of HFMD.
2.Clinical application and experimental studies of the pulsed inhaled nitric oxide flow controlling instrument.
Xu-ming MO ; En-chun ZHAO ; Min-sheng WANG ; Xinglin GU ; Zhenxi WANG ; Chunsheng WANG
Chinese Journal of Medical Instrumentation 2002;26(1):33-35
A flow controlling system for pulsed inhaled nitric oxide has been developed and tested, and here its features and initial animal experiments and clinical applications are described. The physical characteristic test indicates that the practical released dose of NO gas is very close to the theoretical flow of NO gas at variant pressures. Animal experiments demonstrate that inhaled NO gas concentration is lower than the concentration of theoretical inhalation, but the variance is not remarkable (p>0.05). When sixteen cases with CHD and PH were chosen to inhale NO gas (15 ppm, 15 min) PAP and PVR of all cases were reduced after inhalation of NO gas from 617 +/-51.3 dyn x s x cm(-5), 54.4+/-13.1 mmHg to 417+/-36.9 dym x s x cm(-5), 33.8+/-12.3 mmHg (PVR, p<0.01; PAP, p<0.01) respectively. When gas inhalation was stopped, these values returned to their base lines after a short period of time. All these show that the pulsed inhaled NO flow controlling instrument in accordance with the requirements of the designing, can be widely used in clinical diagnoses and treatments and will be a new tool offered for the treatments of the patients with PH.
Administration, Inhalation
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Animals
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Blood Pressure
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Cardiac Output
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Child
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Equipment Design
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instrumentation
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Female
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Heart Defects, Congenital
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physiopathology
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therapy
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Humans
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Hypertension, Pulmonary
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physiopathology
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therapy
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Male
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Nebulizers and Vaporizers
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Nitric Oxide
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administration & dosage
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analysis
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Rabbits
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Vascular Resistance
3.SOX12 Promotes Thyroid Cancer Cell Proliferation and Invasion by Regulating the Expression of POU2F1 and POU3F1
Zhenxi SU ; Wenqing BAO ; Guanghua YANG ; Jianping LIU ; Bin ZHAO
Yonsei Medical Journal 2022;63(6):591-600
Purpose:
SOX12 is overexpressed in many cancers, and we aimed to explore the biological function and mechanism of SOX12 in thyroid cancer.
Materials and Methods:
We first analyzed the expression of SOX12 in thyroid cancer using data in The Cancer Genome Atlas. Immunohistochemistry and qRT-PCR were performed to identify SOX12 expression in thyroid cancer tissue and cells. Thyroid cancer cells were transfected with small interfering RNA targeting SOX12, and cellular functional experiments, including CCK8, wound healing, and Transwell assays, were performed. Protein expression was examined by Western blot analysis. A xenograft model was developed to evaluate the effect of SOX12 on tumor growth in vivo.
Results:
SOX12 expression was increased in thyroid cancer tissue and cells. SOX12 promoted cell proliferation, migration, and invasion and accelerated tumor growth in vivo. The expression of PCNA, Cyclin D1, E-cadherin, Snail, MMP-2, and MMP-9 was affected by SOX12 knockdown. Bioinformatic analysis showed that SOX12 could interact with the POU family. SOX12 knockdown inhibited the expression of POU2F1, POU2F2, POU3F1 and POU3F2, and SOX12 expression showed a positive correlation with POU2F1, POU3F1, and POU3F2 expression in clinical data. POU2F1 and POU3F1 were able to reverse the effect of SOX12 knockdown on thyroid cancer cells.
Conclusion
SOX12 affects the progression of thyroid cancer by regulating epithelial-mesenchymal transition and interacting with POU2F1 and POU3F1, which may be novel targets for thyroid cancer molecular therapy.
4.Correlation analysis of muscle mass and functional mobility in patients with cerebral small vessel disease
Hongyang XIE ; Cuiqiao XIA ; Zhenxi XIA ; Nan ZHANG ; Jie SHEN ; Hongyi ZHAO ; Yonghua HUANG
Chinese Journal of Cerebrovascular Diseases 2024;21(8):514-524
Objective To investigate the correlation between muscle mass and gait parameters in patients with cerebral small vessel disease(CSVD),as well as the impact of reduced muscle mass on the occurrence of falls in CSVD patients.Methods This study was employed a cross-sectional design.Ninety-five inpatients with CSVD confirmed by the Department of Neurology of the Seventh Medical Center of Chinese People's Liberation Army General Hospital from January 1,2022 to June 1,2023 were included consecutively.The 95 patients with CSVD were divided into two groups,namely the reduced muscle mass group and the normal muscle mass group,based on the criteria of appendicular skeletal muscle mass(ASM)≤7.0 kg/m2 for males and ASM ≤5.7 kg/m2 for females as reduced muscle mass.Baseline data(sex,age,years of schooling,number of accompanying diseases[hypertension,hyperlipidemia,diabetes,angina pectoris,myocardial infarction,and migraines]),cognitive function assessment results(mini-mental status examination[MMSE],verbal fluency test[VFT],clock drawing test[CDT],and trail-making test part-B[TMT-B]),gait characteristics(basic gait parameters[gait speed,stride time,stride length,stride frequency]and reanalysis gait parameters[variation coefficient of gait speed,stride time,stride length,stride frequency,and time-phase coordination index,gait asymmetry index]),CSVD imaging findings(cerebral microbleeds,lacunar infarcts,and white matter hyperintensities),and history of falls.The differences in baseline data,cognitive function assessment results,and gait characteristics between the reduced muscle mass group and the normal muscle mass group were compared and analyzed.Linear regression was used to analyze the correlation between muscle mass and gait parameters.The 95 CSVD patients were divided into fall group and non-fall group,and the differences in baseline data,cognitive function assessment results,gait characteristics,CSVD imaging findings,and muscle mass between the two groups were compared.Binary Logistic regression analysis was used to evaluate the impact of reduced muscle mass on falls.Results(1)The majority of patients in the reduced muscle mass group were females(67.7%[21/31]).There was a statistically significant difference in the sex distribution between the reduced muscle mass group and the normal muscle mass group(x2=6.143,P=0.013).There were no statistically significant differences in the other baseline characteristics and cognitive function between the two groups(all P>0.05).(2)Compared to the normal muscle mass group,patients in the reduced muscle mass group had slower gait speed([0.72±0.16]m/s vs.[0.94±0.15]m/s),longer stride time([1.22±0.12]s vs.[1.08±0.08]s),shorter stride length([0.84±0.19]m vs.[1.00±0.14]m),and lower step frequency([100±9]steps/min vs.[112±8]steps/min).The coefficients of variation for gait speed(11.579[8.163,15.870]%vs.7.304[5.873,9.959]%),stride time(3.876[2.778,5.769]%vs.2.480[1.874,3.001]%),stride length(7.800[5.400,10.700]%vs.5.600[4.100,7.950]%),step frequency(5.313[3.568,7.272]%vs.3.674[3.099,5.082]%),and time-phase coordination index(5.894[4.392,9.080]%vs.3.828[3.031,5.972]%)were all increased,and the differences were statistically significant(all P<0.05).There was no statistically significant difference in gait asymmetry index between the two groups(P>0.05).Further analysis with sex and lacunar infarction as potential confounding factors showed that there were statistically significant differences in baseline gait parameters between the normal muscle mass group and the reduced muscle mass group(all P<0.01).In the reanalysis of gait parameters,only the differences in the coefficients of variation for gait speed and stride time were statistically significant(both P<0.05).(3)When analyzing ASM as a continuous variable,age and CDT as potential confounders,and stratifying by sex,the results showed that in male patients,baseline gait parameters(gait speed,stride time,stride length,and step frequency with 95%CI ranging from 0.057 to 0.152,-0.105 to-0.023,0.013 to 0.097,and 1.686 to 8.854,respectively),as well as coefficients of variation for stride time(95%CI-0.016 to-0.003)and stride length(95%CI-0.026 to-0.006),were correlated with muscle mass reduction(all P<0.05).In female patients,gait speed(95%CI0.034 to 0.166)and coefficient of variation for gait speed(95%CI-0.059 to-0.010),stride time(95%CI-0.110 to-0.011),coefficient of variation for stride time(95%CI-0.025 to-0.001),and stride length(95%CI 0.018 to 0.163)were correlated with muscle mass reduction(all P<0.05).(4)Muscle mass reduction was an independent risk factor for falls(OR,5.044,95%CI 1.840 to 13.827,P=0.002).Conclusions The preliminary analysis of this study suggests that there is a certain correlation between muscle mass and gait parameters in patients with CSVD.Additionally,the study indicates that a decrease in muscle mass among CSVD patients may increase the risk of falls.Therefore,it is important to prioritize the management of muscle mass in CSVD patients.