1.Study on the association between systemic immune-inflammation index and metabolic types and characteristics of obesity in children and adolescents
Jiayi WAN ; Shiyun LUO ; Jie HUANG ; Wanzhen ZHONG ; Guixian TAO ; Chunzi ZENG ; Jiaying GUO ; Weiwei ZHANG ; Jing GU ; Yan LI
Chinese Journal of Preventive Medicine 2025;59(11):1916-1923
Objective:To explore the association between the systemic immune-inflammation index (SII) and obesity metabolic phenotypes, as well as metabolic features in children and adolescents.Methods:A cross-sectional study was conducted using the random cluster sampling method from March 2023 to May 2024. Children and adolescents aged 9-17 years in Guangzhou were surveyed through questionnaires, physical measurements, and blood tests. According to BMI and metabolic status, participants were classified into normal-weight groups [metabolically healthy normal weight (MHNW) and metabolically unhealthy normal weight (MUNW)] and overweight/obese groups [metabolically healthy overweight/obese (MHO/O) and metabolically unhealthy overweight/obese (MUO/O)]. After natural log-transformation of SII values (lnSII), multinomial logistic regression was used to assess the association between SII and obesity metabolic phenotypes, while binary logistic regression was applied to assess the relationship between SII and metabolic phenotypes in the overweight/obese subgroup. Linear regression model and restricted cubic spline (RCS) were employed to examine the relationship between SII and metabolic features among the entire population.Results:A total of 3 749 participants were included. After adjusting for covariates, for every unit increase in lnSII, the risk of MHO/O and MUO/O increased by 93% ( OR=1.93, 95% CI: 1.56-2.40, P<0.001) and 156% ( OR=2.56, 95% CI: 2.02-3.25, P<0.001), respectively. In the overweight/obesity subgroup, for every unit increase in lnSII, the risk of MUO/O increased by 37% ( OR=1.37, 95% CI: 1.01-1.87, P=0.045). Linear regression model and RCS showed that lnSII was positively correlated with systolic blood pressure (SBP) and diastolic blood pressure (DBP) (SBP: β=1.39, 95% CI: 0.67-2.11, P<0.001; DBP: β=1.27, 95% CI: 0.79-1.75, P<0.001). lnSII also had a non-linear relationship with triglyceride ( Pnonlinear=0.032) and high-density lipoprotein cholesterol ( Pnonlinear=0.002). Conclusion:Elevated SII levels are associated with unfavorable obesity metabolic phenotypes, higher blood pressure, and altered lipid profiles in children and adolescents. SII may be a potential driving factor for metabolic heterogeneity in children and adolescents.
2.Retrospective analysis of respiratory virus detection methods and epidemiological features in outpatient and emergency departments of Beijing hospitals
Xinlong WANG ; Jiaying ZHANG ; Jun LI ; Jian LIU ; Danying CHEN ; Zhixia GU ; Gang WAN ; Xiaoqin LIU ; Menghan LIU ; Ronghua JIN ; Rui SONG
Chinese Journal of Infectious Diseases 2025;43(10):606-614
Objective:To characterize the epidemiology of respiratory syndrome across healthcare facilities of different types and tiers in Beijing City, to compare pathogen-testing modalities and their associations with adverse outcomes, and to identify key factors associated with progression to severe illness, thereby informing regional prevention, control, and clinical optimization.Methods:The multicenter observational cohort study was performed using outpatient and emergency department data from five sentinel hospitals in Beijing (Beijing Xiaotangshan Hospital, Beijing Chaoyang District Shuangqiao Hospital, Beijing Haidian Hospital, Beijing You′an Hospital, Capital Medical University (Beijing You′an Hospital), and Beijing Ditan Hospital, Capital Medical University (Beijing Ditan Hospital)) from October 1st, 2023 to April 9th, 2025. Dual-target (two-plex) and triple-target (three-plex) respiratory specimens were collected. Demographic characteristics, visit information, pathogen-testing modalities and results were collected, and the epidemiologic features of patients who progressed to severe illness between the influenza high-incidence season (December to May) and the non-influenza season (June to November) were compared. Categorical variables were analyzed using the chi-square test. Multivariable logistic regression was used to estimate associations between covariates and risk of progression to severe illness.Results:Among the 192 131 cases, patients visited at Beijing You′an Hospital were concentrated in the 16 to 44 year age group, accounting for 66.79%(32 532/48 708). Beijing Xiaotangshan Hospital had a broad age distribution, with older adults comprising up to 22.35% (885/3 960). Of the 47 349 respiratory specimens across the five hospitals, Beijing You′an Hospital had the highest positivity rate for dual-target testing (46.76%(1 585/3 390)), while Beijing Haidian Hospital conducted the largest number of this tests ( n=12 514). For triple-target testing, Beijing You′an Hospital again had the highest positivity rate (45.03%(2 835/6 296)), whereas Beijing Ditan Hospital tested the most specimens ( n=12 011; positivity rate was 29.73%(3 571/12 011)). The influenza season within the same period (November 2023 to January 2024) exhibited a bimodal pattern, with alternating circulation of influenza viruses and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Among 32 744 outpatients/emergency patients who progressed to severe illness, significant seasonal differences were observed by sex, age, comorbidity status, and infection type ( χ2=6.60, 189.24, 32.71 and 189.99, respectively; all P<0.05). After adjustment for sex, age group, comorbidities, and infection type, testing modality remained significantly associated with risk of progression (dual-target testing, odds ratio ( OR)=0.116, 95% confidence interval ( CI) 0.111 to 0.122, P<0.001); no testing, OR=0.063, 95% CI 0.060 to 0.065, P<0.001). Conclusions:The epidemiological pattern of respiratory pathogens undergo significant changes after October 2023, which is characterized by alternating waves of influenza viruses and SARS-CoV-2 with pronounced seasonality and diversity. Substantial inter-hospital differences are observed in testing modalities and positivity rates. Risk of progression to severe illness varies significantly by sex, age, comorbidity burden, and infection type, and is closely associated with the testing modality. These findings support strengthening multiplex pathogen testing and targeted surveillance of high-risk groups to improve early identification and precise control of febrile-respiratory syndromes.
3.Bibliometric analysis and reflections on the current status of traditional Chinese medicine systematic reviews and Meta-analysis in the past decade
Jiaying WANG ; Yi ZHAO ; Ru DUAN ; Jingting LIU ; Yun WU ; Jisheng ZHANG ; Xuemei XIANG ; Yifei GU ; Yu TIAN ; Yawen CAO ; Bin LI ; Xianliang WANG ; Jingyuan MAO
Chinese Journal of Pharmacoepidemiology 2025;34(1):57-68
Objective To understand the current status of traditional Chinese medicine(TCM)systematic reviews/Meta-analysis over the past 10 years.Methods Cochrane Database of Systematic Reviews,PubMed,Web of Knowledge,CNKI,SinoMed,WanFang Data,VIP databases,as well as the Cochrane Register and PROSPERO registration platform were searched to collect TCM-related systematic reviews/Meta-analysis published between January 2015 and December 2024.Literature was screened,and standardization of institutions,countries,and journals was performed.Data cleaning was conducted,and trends in publication years,high-frequency diseases,journals,institutions,and highly cited papers were analyzed.Results A total of 11,174 papers were included,involving approximately 56,656 authors from 1,422 institutions across 44 countries,covering 1,300 journals and 1,070 diseases.The top five institutions in terms of publications were Beijing University of Chinese Medicine(954 papers),Guangzhou University of Chinese Medicine(928 papers),China Academy of Chinese Medical Sciences(537 papers),Tianjin University of Chinese Medicine(460 papers),and Chengdu University of Chinese Medicine(393 papers).Foreign institutions with the highest publication volumes were concentrated in South Korea,Iran,and Australia.The most frequently published Chinese journal was Zhongyi Clinical Research with 332 papers,while the most published English journal was Evidence-Based Complementary and Alternative Medicine with 311 papers.There were 282 single-author papers involving 271 authors,and the most cited paper was referenced 323 times,The three most frequently studied diseases were diabetes(267 papers,2.39%),angina pectoris(214 papers,1.92%),and osteoarthritis(210 papers,1.88%).Non-pharmacological interventions such as acupuncture(1,265 papers,11.32%),auricular therapy(101 papers,0.90%),and Tai Chi(98 papers,0.88%)were most frequently reported.In pharmacological interventions,studies on Tripterygium wilfordii tablets(76 papers,0.68%)and Danhong injection(54 papers,0.48%)were more common.Conclusion The systematic reviews/Meta-analysis method is widely used in the field of TCM,and the field continues to grow.Active academic teams,institutions,and journals have emerged.Over the past decade,there has been a considerable body of evidence in Chinese systematic reviews on TCM for chronic diseases such as diabetes,angina pectoris,and osteoarthritis.In English-language studies,non-pharmacological therapies like acupuncture have been more widely reported,and some high-impact studies have emerged.However,challenges remain,such as issues with research transparency and methodological standardization.Future efforts should focus on establishing transparent systems and quality control mechanisms to further enhance the reliability,accuracy,and dissemination of TCM evidence-based research.
4.Survival analysis of female breast cancer in Shanghai:a population-based study from 2002 to 2017
Chunxiao WU ; Yi PANG ; Kai GU ; Jiaying YAN ; Chunfang WANG ; Yongmei XIANG ; Yan SHI
China Oncology 2025;35(3):291-297
Background and purpose:The Shanghai Municipal Center for Disease Control and Prevention provides annual updates on cancer statistics in Shanghai.Breast cancer is one of the common malignant tumors among women.In recent years,the incidence of female breast cancer was increasing,while its trend of mortality showed declining.This study aimed to investigate the survival rates of new female breast cancer cases in Shanghai from 2002 to 2017.Methods:Data of new cases and deaths of female breast cancer patients with follow-up information from 2002 to 2017 were obtained from the Population-based Cancer Registry and Vital Statistics System of Shanghai Municipal Center for Disease Control and Prevention.Numbers,proportions,and survival rates were stratified by year of diagnosis,age,histological type and stage at diagnosis for analysis.The 5-year observed survival rates were calculated based on the life table method.The probabilities of surviving from 0 to 99 years were estimated with the Elandt-Johnson model,and then cumulative expected survival rates were calculated using the Ederer Ⅱ method.Finally,the 5-year relative survival rates were calculated.The annual percent change(APC)of survival rates was estimated by Joinpoint Regression Program.Results:A total of 73 600 new female breast cancer cases were diagnosed from 2002 to 2017 in Shanghai.Among them,67 681 cases were morphological verification,accounting for 91.96%.By December 31,2022,23 745(32.26%)cases had died,and 19 466(26.45%)cases had died of cancer.A total of 68 332(92.84%)cases,who were either dead or followed for over 5 years,were considered to have complete follow-up.The remaining 5 268(7.16%)cases were lost to follow-up.73 538(99.92%)cases were included in the observed cohort for survival analysis.The number of observed cases nearly doubled from 3330 in 2002 to 6095 in 2017.The 5-year observed survival rate changed from 78.77%in 2002 to 84.55%in 2017 dynamically,showed a low increasing trend with an average rate of 0.50%per year(APC=0.50%,t=8.75,P<0.001).The 5-year relative survival rate also increased from 83.46%to 89.24%slowly,with an average rate of 0.47%(APC=0.47%,t=9.80,P<0.001).The overall 5-year observation survival rate of female cancer was 83.24%(82.96%-83.52%),and the 5-year relative survival rate was 87.58%(87.29%-87.87%)in Shanghai from 2002 to 2017.It was increasing over time,decreasing with aging and advanced stage at diagnosis continuously.There was no significant difference in the 5-year relative survival rates between the groups aged 15 to 64(P>0.05).The group with an unknown stage had the highest number of cases,followed by the stage Ⅱ group,and then the stage Ⅰ group.The 5-year relative survival rate of cases with stage Ⅰ disease reached 99.10%(98.78%-99.42%),but these cases only accounted for 25.51%of the total.The 5-year relative survival rate of cases with stage Ⅳ disease was 52.54%(50.98%-54.11%),and these cases accounted for 6.13%of the total.The 5-year relative survival rate of cases with s unknown stage was 82.04%(81.42%-82.65%),and these cases accounted for 31.05%of the total.Conclusion:The diagnostic levels and survival rates of female breast cancer in Shanghai were relatively high and continue to improve.However,the proportions of cases with unknown histological type and unknown stage remain relatively high,and the proportion of stage Ⅰ cases is not very large.The survival rates of stage Ⅳ cases are relatively low.This study provides evidence for further research,prevention and control efforts for female breast cancer.
5.A qualitative study of obstructive and facilitative factors in NICU nurses postural management of mechanically ventilated premature infants
Yiwei LI ; Li WANG ; Meibian GU ; Jiaying GUO ; Yu GUO
Modern Clinical Nursing 2025;24(9):43-48
Objective To analyze the obstacles and promoting factors of NICU nurses postural management of mechanically ventilated premature infants,and to provide reference for improving the postural management quality of mechanically ventilated premature infants.Methods From March to May 2024,12 nurses in NICU of 4 Grade A hospitals in were subjected by objective sampling during the period of phenomenological study,and investigated by semi-structured in-depth interviews.Colaizzi seven-step analysis was used for sorting out the interview data and analyzing the topics.Results The promoting factors for position management of premature infants on mechanical ventilation include empirical management,sense of responsibility,empathy,professional identity and reflection and summary;the hindering factors include nurses'lack of cognition of position management,lack of knowledge of position management,existence of risks and hidden dangers,improper allocation of human resources,difficulty in transforming scientific research achievements and lack of position management plans.Conclusion NICU nurses have obstacles and promoters to posture management of premature infants with mechanical ventilation,and intervention can improve posture management quality of premature infants with mechanical ventilation.
6.A qualitative study of obstructive and facilitative factors in NICU nurses postural management of mechanically ventilated premature infants
Yiwei LI ; Li WANG ; Meibian GU ; Jiaying GUO ; Yu GUO
Modern Clinical Nursing 2025;24(9):43-48
Objective To analyze the obstacles and promoting factors of NICU nurses postural management of mechanically ventilated premature infants,and to provide reference for improving the postural management quality of mechanically ventilated premature infants.Methods From March to May 2024,12 nurses in NICU of 4 Grade A hospitals in were subjected by objective sampling during the period of phenomenological study,and investigated by semi-structured in-depth interviews.Colaizzi seven-step analysis was used for sorting out the interview data and analyzing the topics.Results The promoting factors for position management of premature infants on mechanical ventilation include empirical management,sense of responsibility,empathy,professional identity and reflection and summary;the hindering factors include nurses'lack of cognition of position management,lack of knowledge of position management,existence of risks and hidden dangers,improper allocation of human resources,difficulty in transforming scientific research achievements and lack of position management plans.Conclusion NICU nurses have obstacles and promoters to posture management of premature infants with mechanical ventilation,and intervention can improve posture management quality of premature infants with mechanical ventilation.
7.Survival analysis of female breast cancer in Shanghai:a population-based study from 2002 to 2017
Chunxiao WU ; Yi PANG ; Kai GU ; Jiaying YAN ; Chunfang WANG ; Yongmei XIANG ; Yan SHI
China Oncology 2025;35(3):291-297
Background and purpose:The Shanghai Municipal Center for Disease Control and Prevention provides annual updates on cancer statistics in Shanghai.Breast cancer is one of the common malignant tumors among women.In recent years,the incidence of female breast cancer was increasing,while its trend of mortality showed declining.This study aimed to investigate the survival rates of new female breast cancer cases in Shanghai from 2002 to 2017.Methods:Data of new cases and deaths of female breast cancer patients with follow-up information from 2002 to 2017 were obtained from the Population-based Cancer Registry and Vital Statistics System of Shanghai Municipal Center for Disease Control and Prevention.Numbers,proportions,and survival rates were stratified by year of diagnosis,age,histological type and stage at diagnosis for analysis.The 5-year observed survival rates were calculated based on the life table method.The probabilities of surviving from 0 to 99 years were estimated with the Elandt-Johnson model,and then cumulative expected survival rates were calculated using the Ederer Ⅱ method.Finally,the 5-year relative survival rates were calculated.The annual percent change(APC)of survival rates was estimated by Joinpoint Regression Program.Results:A total of 73 600 new female breast cancer cases were diagnosed from 2002 to 2017 in Shanghai.Among them,67 681 cases were morphological verification,accounting for 91.96%.By December 31,2022,23 745(32.26%)cases had died,and 19 466(26.45%)cases had died of cancer.A total of 68 332(92.84%)cases,who were either dead or followed for over 5 years,were considered to have complete follow-up.The remaining 5 268(7.16%)cases were lost to follow-up.73 538(99.92%)cases were included in the observed cohort for survival analysis.The number of observed cases nearly doubled from 3330 in 2002 to 6095 in 2017.The 5-year observed survival rate changed from 78.77%in 2002 to 84.55%in 2017 dynamically,showed a low increasing trend with an average rate of 0.50%per year(APC=0.50%,t=8.75,P<0.001).The 5-year relative survival rate also increased from 83.46%to 89.24%slowly,with an average rate of 0.47%(APC=0.47%,t=9.80,P<0.001).The overall 5-year observation survival rate of female cancer was 83.24%(82.96%-83.52%),and the 5-year relative survival rate was 87.58%(87.29%-87.87%)in Shanghai from 2002 to 2017.It was increasing over time,decreasing with aging and advanced stage at diagnosis continuously.There was no significant difference in the 5-year relative survival rates between the groups aged 15 to 64(P>0.05).The group with an unknown stage had the highest number of cases,followed by the stage Ⅱ group,and then the stage Ⅰ group.The 5-year relative survival rate of cases with stage Ⅰ disease reached 99.10%(98.78%-99.42%),but these cases only accounted for 25.51%of the total.The 5-year relative survival rate of cases with stage Ⅳ disease was 52.54%(50.98%-54.11%),and these cases accounted for 6.13%of the total.The 5-year relative survival rate of cases with s unknown stage was 82.04%(81.42%-82.65%),and these cases accounted for 31.05%of the total.Conclusion:The diagnostic levels and survival rates of female breast cancer in Shanghai were relatively high and continue to improve.However,the proportions of cases with unknown histological type and unknown stage remain relatively high,and the proportion of stage Ⅰ cases is not very large.The survival rates of stage Ⅳ cases are relatively low.This study provides evidence for further research,prevention and control efforts for female breast cancer.
8.Bibliometric analysis and reflections on the current status of traditional Chinese medicine systematic reviews and Meta-analysis in the past decade
Jiaying WANG ; Yi ZHAO ; Ru DUAN ; Jingting LIU ; Yun WU ; Jisheng ZHANG ; Xuemei XIANG ; Yifei GU ; Yu TIAN ; Yawen CAO ; Bin LI ; Xianliang WANG ; Jingyuan MAO
Chinese Journal of Pharmacoepidemiology 2025;34(1):57-68
Objective To understand the current status of traditional Chinese medicine(TCM)systematic reviews/Meta-analysis over the past 10 years.Methods Cochrane Database of Systematic Reviews,PubMed,Web of Knowledge,CNKI,SinoMed,WanFang Data,VIP databases,as well as the Cochrane Register and PROSPERO registration platform were searched to collect TCM-related systematic reviews/Meta-analysis published between January 2015 and December 2024.Literature was screened,and standardization of institutions,countries,and journals was performed.Data cleaning was conducted,and trends in publication years,high-frequency diseases,journals,institutions,and highly cited papers were analyzed.Results A total of 11,174 papers were included,involving approximately 56,656 authors from 1,422 institutions across 44 countries,covering 1,300 journals and 1,070 diseases.The top five institutions in terms of publications were Beijing University of Chinese Medicine(954 papers),Guangzhou University of Chinese Medicine(928 papers),China Academy of Chinese Medical Sciences(537 papers),Tianjin University of Chinese Medicine(460 papers),and Chengdu University of Chinese Medicine(393 papers).Foreign institutions with the highest publication volumes were concentrated in South Korea,Iran,and Australia.The most frequently published Chinese journal was Zhongyi Clinical Research with 332 papers,while the most published English journal was Evidence-Based Complementary and Alternative Medicine with 311 papers.There were 282 single-author papers involving 271 authors,and the most cited paper was referenced 323 times,The three most frequently studied diseases were diabetes(267 papers,2.39%),angina pectoris(214 papers,1.92%),and osteoarthritis(210 papers,1.88%).Non-pharmacological interventions such as acupuncture(1,265 papers,11.32%),auricular therapy(101 papers,0.90%),and Tai Chi(98 papers,0.88%)were most frequently reported.In pharmacological interventions,studies on Tripterygium wilfordii tablets(76 papers,0.68%)and Danhong injection(54 papers,0.48%)were more common.Conclusion The systematic reviews/Meta-analysis method is widely used in the field of TCM,and the field continues to grow.Active academic teams,institutions,and journals have emerged.Over the past decade,there has been a considerable body of evidence in Chinese systematic reviews on TCM for chronic diseases such as diabetes,angina pectoris,and osteoarthritis.In English-language studies,non-pharmacological therapies like acupuncture have been more widely reported,and some high-impact studies have emerged.However,challenges remain,such as issues with research transparency and methodological standardization.Future efforts should focus on establishing transparent systems and quality control mechanisms to further enhance the reliability,accuracy,and dissemination of TCM evidence-based research.
9.Study on the association between systemic immune-inflammation index and metabolic types and characteristics of obesity in children and adolescents
Jiayi WAN ; Shiyun LUO ; Jie HUANG ; Wanzhen ZHONG ; Guixian TAO ; Chunzi ZENG ; Jiaying GUO ; Weiwei ZHANG ; Jing GU ; Yan LI
Chinese Journal of Preventive Medicine 2025;59(11):1916-1923
Objective:To explore the association between the systemic immune-inflammation index (SII) and obesity metabolic phenotypes, as well as metabolic features in children and adolescents.Methods:A cross-sectional study was conducted using the random cluster sampling method from March 2023 to May 2024. Children and adolescents aged 9-17 years in Guangzhou were surveyed through questionnaires, physical measurements, and blood tests. According to BMI and metabolic status, participants were classified into normal-weight groups [metabolically healthy normal weight (MHNW) and metabolically unhealthy normal weight (MUNW)] and overweight/obese groups [metabolically healthy overweight/obese (MHO/O) and metabolically unhealthy overweight/obese (MUO/O)]. After natural log-transformation of SII values (lnSII), multinomial logistic regression was used to assess the association between SII and obesity metabolic phenotypes, while binary logistic regression was applied to assess the relationship between SII and metabolic phenotypes in the overweight/obese subgroup. Linear regression model and restricted cubic spline (RCS) were employed to examine the relationship between SII and metabolic features among the entire population.Results:A total of 3 749 participants were included. After adjusting for covariates, for every unit increase in lnSII, the risk of MHO/O and MUO/O increased by 93% ( OR=1.93, 95% CI: 1.56-2.40, P<0.001) and 156% ( OR=2.56, 95% CI: 2.02-3.25, P<0.001), respectively. In the overweight/obesity subgroup, for every unit increase in lnSII, the risk of MUO/O increased by 37% ( OR=1.37, 95% CI: 1.01-1.87, P=0.045). Linear regression model and RCS showed that lnSII was positively correlated with systolic blood pressure (SBP) and diastolic blood pressure (DBP) (SBP: β=1.39, 95% CI: 0.67-2.11, P<0.001; DBP: β=1.27, 95% CI: 0.79-1.75, P<0.001). lnSII also had a non-linear relationship with triglyceride ( Pnonlinear=0.032) and high-density lipoprotein cholesterol ( Pnonlinear=0.002). Conclusion:Elevated SII levels are associated with unfavorable obesity metabolic phenotypes, higher blood pressure, and altered lipid profiles in children and adolescents. SII may be a potential driving factor for metabolic heterogeneity in children and adolescents.
10.Retrospective analysis of respiratory virus detection methods and epidemiological features in outpatient and emergency departments of Beijing hospitals
Xinlong WANG ; Jiaying ZHANG ; Jun LI ; Jian LIU ; Danying CHEN ; Zhixia GU ; Gang WAN ; Xiaoqin LIU ; Menghan LIU ; Ronghua JIN ; Rui SONG
Chinese Journal of Infectious Diseases 2025;43(10):606-614
Objective:To characterize the epidemiology of respiratory syndrome across healthcare facilities of different types and tiers in Beijing City, to compare pathogen-testing modalities and their associations with adverse outcomes, and to identify key factors associated with progression to severe illness, thereby informing regional prevention, control, and clinical optimization.Methods:The multicenter observational cohort study was performed using outpatient and emergency department data from five sentinel hospitals in Beijing (Beijing Xiaotangshan Hospital, Beijing Chaoyang District Shuangqiao Hospital, Beijing Haidian Hospital, Beijing You′an Hospital, Capital Medical University (Beijing You′an Hospital), and Beijing Ditan Hospital, Capital Medical University (Beijing Ditan Hospital)) from October 1st, 2023 to April 9th, 2025. Dual-target (two-plex) and triple-target (three-plex) respiratory specimens were collected. Demographic characteristics, visit information, pathogen-testing modalities and results were collected, and the epidemiologic features of patients who progressed to severe illness between the influenza high-incidence season (December to May) and the non-influenza season (June to November) were compared. Categorical variables were analyzed using the chi-square test. Multivariable logistic regression was used to estimate associations between covariates and risk of progression to severe illness.Results:Among the 192 131 cases, patients visited at Beijing You′an Hospital were concentrated in the 16 to 44 year age group, accounting for 66.79%(32 532/48 708). Beijing Xiaotangshan Hospital had a broad age distribution, with older adults comprising up to 22.35% (885/3 960). Of the 47 349 respiratory specimens across the five hospitals, Beijing You′an Hospital had the highest positivity rate for dual-target testing (46.76%(1 585/3 390)), while Beijing Haidian Hospital conducted the largest number of this tests ( n=12 514). For triple-target testing, Beijing You′an Hospital again had the highest positivity rate (45.03%(2 835/6 296)), whereas Beijing Ditan Hospital tested the most specimens ( n=12 011; positivity rate was 29.73%(3 571/12 011)). The influenza season within the same period (November 2023 to January 2024) exhibited a bimodal pattern, with alternating circulation of influenza viruses and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Among 32 744 outpatients/emergency patients who progressed to severe illness, significant seasonal differences were observed by sex, age, comorbidity status, and infection type ( χ2=6.60, 189.24, 32.71 and 189.99, respectively; all P<0.05). After adjustment for sex, age group, comorbidities, and infection type, testing modality remained significantly associated with risk of progression (dual-target testing, odds ratio ( OR)=0.116, 95% confidence interval ( CI) 0.111 to 0.122, P<0.001); no testing, OR=0.063, 95% CI 0.060 to 0.065, P<0.001). Conclusions:The epidemiological pattern of respiratory pathogens undergo significant changes after October 2023, which is characterized by alternating waves of influenza viruses and SARS-CoV-2 with pronounced seasonality and diversity. Substantial inter-hospital differences are observed in testing modalities and positivity rates. Risk of progression to severe illness varies significantly by sex, age, comorbidity burden, and infection type, and is closely associated with the testing modality. These findings support strengthening multiplex pathogen testing and targeted surveillance of high-risk groups to improve early identification and precise control of febrile-respiratory syndromes.

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