1.Development and validation of nomogram and neural network prediction models for stroke-associated pneumonia in patients with acute stroke
Fengchen GAO ; Haimei SUN ; Fuqiang ZHOU ; Weixiang LI ; Siting HUA ; Xuejun LONG ; Ruifei WANG
International Journal of Cerebrovascular Diseases 2025;33(3):173-179
Objectives:To investigate the predictive factors of stroke associated-pneumonia (SAP) in patients with acute stroke, develop nomogram and neural network prediction models and verify their predictive performance.Methods:Patients with acute stroke admitted to the First Affiliated Hospital of Kunming Medical University and Zhenxiong County People's Hospital were included retrospectively. Multivariate logistic regression analysis was used to determine the independent predictive factors of SAP, and develop nomogram and neural network prediction models. Receiver operating characteristic curve (ROC) curves were used to validate and compare the predictive performances. Results:A total of 450 patients with acute stroke were enrolled, including 286 males (63.6%), aged 64.28±13.24 years; 344 patientss (76.4%) had ischemic stroke and 106 (23.6%) had hemorrhagic stroke; 128 patients (28.4%) experienced SAP. According to the random number method, they were divided into a modeling cohort ( n=300) and a validation cohort ( n=150). Multivariate logistic regression analysis in the modeling cohort showed that a higher baseline National Institutes of Health Stroke Scale (NIHSS) score, gastric tube placement, use of proton pump inhibitors, heart failure, and higher neutrophil/lymphocyte ratio (NLR) were the independent predictive factors of SAP. ROC curve analysis showed that the area under the ROC curve of the nomogram model for predicting SAP in the modeling cohort and validation cohort was 0.841 (95% confidence interval [ CI] 0.795-0.880) and 0.863 (95% CI 0.798-0.914), respectively. The sensitivity for predicting SAP were 75.00% and 70.45%, respectively, and the specificity was 81.94% and 92.45%, respectively. The area under the ROC curve of the neural network model for predicting SAP in the modeling cohort and validation cohort was 0.847 (95% CI 0.802-0.866) and 0.862 (95% CI 0.796-0.913), respectively. The sensitivity for predicting SAP were 76.19% and 72.73%, and the specificity was 79.17% and 89.62%, respectively. Conclusions:Higher NIHSS score, gastric tube placement, use of proton pump inhibitors, heart failure, and higher NLR are the independent risk factors for SAP in patients with acute stroke. The nomogram and neural network prediction model developed using the above risk factors have higher predictive value for SAP.
2.The Construction of A Predictive Model for Clinical Pregnancy Outcome in Frozen-thawed Embryo Transfer Cycles in Women with Advanced Maternal Age
Junqiang WANG ; Ying CHEN ; Fengchen GAO ; Wenxiu ZHAO ; Shuxuan CAO ; Yixi LI ; Limei HE ; Zexing YANG
Journal of Kunming Medical University 2025;46(8):51-57
Objective To construct a predictive model for clinical pregnancy outcomes in frozen-thawed embryo transfer(FET)cycles in women with advanced maternal age(age≥35 years)and to analyze its influencing factors.Methods A retrospective analysis was conducted on the clinical data of 2717 older patients who underwent FET treatment at the First Affiliated Hospital of Kunming Medical University from January 2018 to December 2023.These Patients were divided into a clinical pregnancy group(n=851)and a non-clinical pregnancy group(n=1866)based on whether the clinical pregnancy had occurred.The general characteristics and transplantation details of the two groups were compared,and a logistic regression analysis model was constructed.Results The clinical pregnancy rate(CPR)was 31.32%.The CPR for women aged 35-40 years(40.06%)was higher than that for women aged≥40 years(19.35%),with a statistically significant difference(χ2=133.371,P<0.05).The model results showed that the higher anti-Mullerian hormone(AMH)levels(OR=1.053,95%CI:1.012-1.095),the more high-quality blastocysts were transferred(OR=1.704,95%CI:1.143-2.542;OR=2.861,95%CI:1.921-4.262);the more high-quality blastocysts were transferred(OR=2.033,95%CI:1.077-3.836;OR=3.886,95%CI:2.035-7.420),the thicker the endometrial lining on the day of transfer(OR=1.150,95%CI:1.092-1.212)and it could increase the probability of clinical pregnancy.However,for women over 40 years of age(OR=0.551,95%CI:0.437-0.694)and secondary infertility(OR=0.704,95%CI:0.552-0.896),the probability of clinical pregnancy would be reduced;ROC curve analysis results showed that the AUC for predicting clinical pregnancy occurrence in the training set and validation set of the predictive model were 0.723(95%CI:0.699-0.748)and 0.726(95%CI:0.689-0.764),respectively,with cutoff values of 0.262 and 0.260 and the model fit was good(P>0.05).Conclusion Female age,AMH level,type of infertility,number of high-quality embryos(cleavage embryos,blastocysts)transferred,and endometrial thickness on the day of transfer are important factors affecting FET cycles in advanced maternal age women.The constructed prediction model based on these factors has a certain predictive ability for clinical pregnancy.
3.Effect of interpersonal and social rhythm therapy on first-episode adolescents with depressive disorder
Fengchen GAO ; Wei LUO ; Yan CHEN ; Fan PENG
Sichuan Mental Health 2021;34(3):235-238
ObjectiveTo explore the efficacy of Interpersonal and Social Rhythm Therapy (IPSRT) on first-episode adolescent depressive disorder, so as to provide references for the treatment. MethodsA total of 310 first-episode adolescents with depressive disorder who met the International Classification of Diseases, tenth edition (ICD-10) were included as the research objects. They were randomly divided into research group (n=155) and control group (n=155). The research group received IPSRT, while the control group received conventional psychological intervention. Before and 2 weeks after the intervention, all participants were asked to complete Hamilton Anxiety Scale (HAMA), Hamilton Depression Scale-24 item (HAMD-24) and Interpersonal Competence Questionnaire (ICQ). The sleep quality was evaluated by portable monitoring devices. ResultsAfter intervention, compared with the control group, HAMA score [(5.92±1.04) vs. (10.23±1.09), t=-10.310, P<0.01], time to fall asleep [(0.26±0.09)h vs. (1.29±0.78)h, t=-4.701, P<0.01] and time in bed[(10.19±0.99)h vs. (11.30±1.38)h, t=-2.353, P=0.027] in research group were significantly lower. In research group, active social interaction [(20.23±1.59) vs. (17.38±1.33), t=4.959, P<0.01], appropriate rejection [(14.77±1.17) vs. (11.77±1.48), t=5.740, P<0.01], self-disclosure [(20.92±1.66) vs. (16.15±1.46), t=7.780, P<0.01] and affective support [(21.00±1.53) vs. (18.85±1.99), t=3.092, P<0.01] of ICQ were significantly higher than those in control group. ConclusionThe implementation of IPSRT in first-episode adolescents with depressive disorder may help to improve sleep quality, adjust inappropriate psychological state and improve interpersonal skills.

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