1.Efficacy and safety of repetitive transcranial magnetic stimulation in the treatment of postpartum depression: a Meta-analysis
Shuang ZHENG ; Luping YANG ; Binyang HUANG ; Miao CAO ; Mengxiao LI ; Wenjun YANG ; Chunliang GUO ; Rongmei ZHENG ; Yuyang ZHANG ; Hua LI
Sichuan Mental Health 2025;38(6):568-576
BackgroundPostpartum depression (PPD) is a prevalent postpartum complications that significantly compromises women's psychological and physical well-being. Repetitive transcranial magnetic stimulation (rTMS), a conventional neuromodulation technique, has been increasingly used in the treatment of PPD. However, high-quality evidence regarding its efficacy and safety remains limited. ObjectiveTo evaluate the efficacy and safety of rTMS in the treatment of PPD, thereby providing references for clinical treatment. MethodsDatabases including Cochrane Library, PubMed, Embase, CNKI, Wanfang, VIP and China Biology Medicine disc (CBM) were electronically searched for randomized controlled trials (RCTs) on rTMS for PPD, with the search spanning from database inception to February 8, 2025. Study quality was assessed using the Cochrane Handbook for Systematic Reviews of Interventions 5.0.1, and the certainty of evidence was graded according to the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. Meta-analysis was conducted using RevMan 5.3 and Stata 12.0. The outcomes of the Meta-analysis included the total effective rate, Edinburgh Postnatal Depression Scale (EPDS) score, Hamilton Depression Rating Scale (HAMD) score, and adverse reactions (dizziness, headache, nausea, diarrhea, and the overall incidence of adverse reactions). ResultsA total of 11 studies involving 729 patients with PPD were included. Meta-analysis results showed that the total effective rate in the study group was significantly higher than that in the control group (OR=5.54, 95% CI: 3.07–10.01, P<0.01). Both EPDS score (SMD=-2.38, 95% CI: -3.39–-1.37, P<0.01) and HAMD score (SMD=2.53, 95% CI: 1.21–3.85, P<0.01) in the study group were significantly lower than those in the control group, with statistically significant differences. Comparisons between the study group and control group reveal no significant differences in the incidence of dizziness and headache (RR=1.47, 95% CI: 0.63–3.43, P>0.05), nausea (RR=1.46, 95% CI: 0.55–3.86, P>0.05), diarrhea (RR=0.71, 95% CI: 0.23–2.20, P>0.05), and overall adverse reactions (RR=1.30, 95% CI: 0.79–2.15, P>0.05). GRADE assessment rated the four indicators of dizziness and headache, diarrhea, overall incidence of adverse reactions, and EPDS score as "moderate-certainty evidence", and rated the total effective rate, nausea, and the HAMD score as "low-certainty evidence". ConclusionrTMS demonstrates certain therapeutic efficacy for PPD, with a safety profile comparable to conventional treatment. [Funded by Sichuan Psychological Society Research Planning Project (number, SCSXLXH202403099); Guiding Science and Technology Plan Project of Guangyuan (number, 23ZDYF0095)]
2.Comparative analysis of the efficacy of dienogest and LNG-IUS in the treatment of intrinsic and extrinsic subtypes of adenomyosis
Lu LIU ; Jing WANG ; Xinran GAO ; Molin WANG ; Meng LI ; Chunliang SHANG ; Hongyan GUO
Chinese Journal of Obstetrics and Gynecology 2025;60(4):281-288
Objective:To compare the efficacy of dienogest (DNG) and levonorgestrel-releasing intrauterine system (LNG-IUS) in the treatment of intrinsic and extrinsic subtypes of adenomyosis.Methods:Totally 232 patients were enrolled in the study who were diagnosed as adenomyosis by ultrasound or pelvic magnetic resonance imaging (MRI), and were classified into intrinsic and extrinsic subtypes according to different locations of lesions in MRI, treated with DNG (DNG group) or LNG-IUS (LNG-IUS group) in Peking University Third Hospital from July 2019 to December 2023. Clinical data of patients were retrospectively collected to analyze the clinical and imaging characteristics of different MRI subtypes of adenomyosis and whether there were differences in the therapeutic effects of DNG and LNG-IUS.Results:(1) Among the 232 patients enrolled, 129 were intrinsic subtype and 103 were extrinsic subtype. Among the 129 patients treated with DNG, the numbers of intrinsic and extrinsic subtype were 69 and 60, respectively. And among the 103 patients treated with LNG-IUS, the numbers of intrinsic and extrinsic subtype were 60 and 43, respectively. The mean age in DNG group [(37.5±5.6) years] was lower than that in LNG-IUS group [(40.3±4.3) years, P<0.001]. There were no significant differences in other clinical features (all P>0.05). (2) The visual analog scale (VAS) scores of dysmenorrhea and cancer antigen 125 (CA 125) levels in DNG group and LNG-IUS group were significantly decreased after treatment (all P<0.001), and hemoglobin levels were increased (both P<0.01). Compared between the two groups, the VAS score after treatment was lower in DNG group ( P<0.001), and the hemoglobin level was increased more significantly in DNG group ( P=0.016). The complete remission rates of dysmenorrhea in DNG group and LNG-IUS group were 73.0% (89/122) and 29.5% (28/95), respectively ( P=0.039). The incidence of irregular bleeding in DNG group was higher than LNG-IUS group, but there was no statistical significance [62.8% (81/129) vs 52.4% (54/103), P=0.112]. (3) Among patients with intrinsic adenomyosis, the incidence of menorrhagia was significantly higher than in those with extrinsic adenomyosis ( P<0.001), while the incidence and severity of dysmenorrhea were lower compared to extrinsic adenomyosis ( P=0.004, P=0.007, respectively). After treatment with DNG and LNG-IUS, there were no statistically significant differences in VAS scores between patients with intrinsic and extrinsic adenomyosis (all P>0.05). The incidence of irregular bleeding after DNG treatment was 78.3% (54/69) in intrinsic adenomyosis, which was higher than the 45.0% (27/60) observed in extrinsic adenomyosis ( P<0.01). Similarly, the incidence of irregular bleeding after LNG-IUS treatment was 63.3% (38/60) in intrinsic adenomyosis, higher than the 37.2% (16/43) in extrinsic adenomyosis ( P=0.009). (4) DNG treatment ( OR=19.163, 95% CI: 7.564-48.544; P<0.01) and duration of treatment ( OR=1.043, 95% CI: 1.012-1.075; P=0.007) were independent positive factors for complete remission of dysmenorrhea, while VAS score before treatment ( OR=0.654, 95% CI: 0.454-0.942; P=0.023) was negative factor. Intrinsic subtype was an independent risk factor for irregular bleeding ( OR=0.436, 95% CI: 0.235-0.811; P=0.009). Conclusions:DNG demonstrates greater advantages over LNG-IUS in terms of complete relief of dysmenorrhea and the degree of symptom alleviation. The incidence of irregular vaginal bleeding in patients with intrinsic adenomyosis is higher than in those with extrinsic adenomyosis. For patients with extrinsic adenomyosis, particularly those with prominent dysmenorrhea symptoms, DNG treatment offers greater benefits. However, for patients with intrinsic adenomyosis and those with significant menstrual disorders, a more cautious approach is required when selecting progestin therapy, along with enhanced monitoring and management.
3.Study on the association between heatwaves and fall-related mortality risk in seven provinces of China
Zhiying JIANG ; Ruilin MENG ; Ruoyi ZHANG ; Xuelong GU ; Jianxiong HU ; Min YU ; Yang CHEN ; Chunliang ZHOU ; Biao HUANG ; Ziyi LIANG ; Sujuan CHEN ; Jianhao LI ; Guanhao HE ; Tao LIU ; Hua GUO ; Wenjun MA
Chinese Journal of Epidemiology 2025;46(4):566-572
Objective:To evaluate the association between heatwaves and fall-related mortality.Methods:A total of 61 421 fall-related mortality from 2013 to 2022 in 7 provinces of China were included in a time-stratified case-crossover design, with daily meteorological data derived from the fifth generation European Reanalysis dataset produced by the European Centre for Medium-Range Weather Forecasts. Conditional logistic regression chimeric distributed lag nonlinear model was used to analyze the association between heatwaves and fall-related mortality and stratified analysis was conducted according to gender and age.Results:Heatwaves were associated with an increased risk of fall-related morality. The risk of fall-related mortality during heatwaves was higher than during non-heatwave periods ( OR=1.11, 95% CI: 1.05-1.18). The attributable fraction of fall-related motality due to heatwaves was 10.25% (95% CI: 4.49%-15.36%). For each 1 ℃ increase above the heatwave threshold, the risk of fall-related mortality increased by 34% ( OR=1.34, 95% CI: 1.02-1.76). The effect of heatwave duration on fall-related mortality was not statistically significant. Stratified analyses indicated that women experienced a higher risk of fall-related mortality during heatwaves ( OR=1.13, 95% CI: 1.04-1.22) compared to man ( OR=1.10, 95% CI: 1.04-1.17). Conclusions:Heatwave increases the risk of fall-related mortality, and the intensity of heatwaves modify this risk. Women are vulnerable populations.
4.The relationship between CT lung volume parameters and pulmonary function grade in patients with idiopathic pulmonary fibrosis and its prediction of acute exacerbation
Yafeng LIU ; Chunliang YAN ; Shaofei LI ; Xiyan REN ; Huijuan ZHANG ; Chunting TAN
Journal of Practical Radiology 2025;41(7):1215-1219
Objective To investigate the relationship between CT lung volume parameters(CT-LVP)and pulmonary function grade in patients with idiopathic pulmonary fibrosis(IPF)and its prediction of acute exacerbation.Methods A total of 204 patients with IPF were selected and divided into mild group(67 cases),moderate group(72 cases)and severe group(65 cases)according to the semi-quantitative scoring method of high-resolution computed tomography(HRCT).The correlation between CT-LVP and pul-monary function parameters(PFP)were analyzed.The predictive value of CT-LVP for acute exacerbation in severe IPF was ana-lyzed.Results The whole lung volume(WLV),normal lung volume(NLV)and normal lung volume percentage(NLV%)in severe group were lower than those in mild and moderate groups,whereas interstitial lung disease volume(ILDV)and interstitial lung disease volume percentage(ILDV%)were higher than those in mild and moderate groups,with statistical significance(P<0.05).WLV,NLV,ILDV,NLV%,ILDV%showed strong correlations with forced expiratory volume in 1 second percentage(FEV1%),forced expiratory volume in 1 second to forced vital capacity ratio(FEV1/FVC),diffusing capacity of the lung for carbon monoxide percent-age(DLCO%),and residual volume to total lung capacity ratio(RV/TLC).Receiver operating characteristic(ROC)curve analysis showed that the combination of WLV,NLV,ILDV,NLV%and ILDV%had higher accuracy in predicting acute exacerbation,area under the curve(AUC)>0.75(P<0.05).Conclusion CT-LVP is closely related to PFP,and the accuracy of CT-LVP combination in predicting acute exacerbation is high,which provides a theoretical basis for preventing acute exacerbation of IPF.
5.Heat-sensitive moxibustion robot for improving depressive state in methamphetamine addicts during withdrawal period: a randomized controlled trial.
Yuexia JIANG ; Haiyan LI ; Wei HE ; Jing ZHOU ; Chunliang ZOU ; Dingyi XIE ; Rixin CHEN
Chinese Acupuncture & Moxibustion 2025;45(8):1061-1067
OBJECTIVE:
To observe the clinical efficacy of heat-sensitive moxibustion robot for improving the depressive state of methamphetamine addicts during withdrawal period.
METHODS:
A total of 60 patients with methamphetamine addiction accompanied with depressive state were randomly divided into an observation group (40 cases, 4 cases dropped out) and a control group (20 cases, 2 cases dropped out). The control group received routine health education and addiction treatment in compulsory isolation drug rehabilitation center. On the basis of the treatment in the control group, in the observation group, the heat-sensitive moxibustion robot was used to locate sensitive points at the Shenque (CV8) and Danzhong (CV17), and dual-point sparrow-pecking moxibustion was delivered for 60 min per session. The moxibustion therapy was performed 4 times in the 1st week, 3 times in the 2nd and 3rd weeks respectively, and 2 times in the 4th week, for 12 times totally. The scores of Hamilton depression scale (HAMD), self-rating depression scale (SDS), visual analogue scale (VAS) for drug craving, Hamilton anxiety scale (HAMA), self-rating anxiety scale (SAS), and Pittsburgh sleep quality index (PSQI) were observed before treatment, at the end of the 2nd and 4th weeks of treatment, and 4 weeks after the treatment completion (follow-up) in the two groups.
RESULTS:
At each time point after treatment, in the observation group, the HAMD, VAS, HAMA and PSQI scores were decreased compared with those before treatment (P<0.01, P<0.001); at the end of the 4th week of treatment and in follow-up, the SDS and SAS scores were decreased compared with those before treatment (P<0.001, P<0.01). Compared before treatment, there were no significant differences in the above scores at each time point after treatment in the control group (P>0.05). In the observation group, at each time point after treatment, the HAMD and VAS scores were lower than those in the control group (P<0.01, P<0.001, P<0.05); at the end of the 4th week of treatment and in follow-up, the SDS and HAMA scores were lower than those in the control group (P<0.05, P<0.001); at the end of the 4th week of treatment, the PSQI score was lower than that in the control group (P<0.01).
CONCLUSION
Heat-sensitive moxibustion robot effectively improves depression, anxiety and sleep quality, and reduces drug craving in methamphetamine addicts during withdrawal period.
Humans
;
Moxibustion/methods*
;
Male
;
Adult
;
Female
;
Methamphetamine/adverse effects*
;
Depression/therapy*
;
Middle Aged
;
Robotics
;
Young Adult
;
Amphetamine-Related Disorders/psychology*
;
Acupuncture Points
;
Substance Withdrawal Syndrome/psychology*
6.Scutellarin inhibits proliferation and migration of human gastric cancer cell line MGC803
Chunliang JIA ; Lei LIANG ; Hansong LI ; Jian WANG ; Lei ZHANG ; Qingke LI ; Yuan YAO
Basic & Clinical Medicine 2025;45(8):1048-1053
Objective To explore the effect of scutellarin(SCU)through regulation of nuclear transcription factor kappa B(NF-κB)p65 signaling pathway on the proliferation and migration of gastric cancer cells line MGC803.Methods To select SCUs with concentrations of 100,250,and 500 nmol/L for subsequent experiments;MGC803 gastric cancer cells were separated into a control group,SCU-L group(100 nmol/L),SCU-M group(250 nmol/L),SCU-H group(500 nmol/L),SCU-H+PMA group(NF-κB activator,200 nmol/L PMA).Cell plate cloning experiments were applied to detect cell proliferation.Scratch healing experiment was used to detect the migration of MGC803 cells;Tran swell assay was used to detect the invasive ability of MGC803 cells;Enzyme linked immuno-sorbent assay(ELISA)was used to detect the level of IFN-γ,IL-4,and IL-10 in the supernatant of MGC803 cells;Western blot detection of NF-κB p65 pathway related protein expression.Results SCU inhibited proliferation of MGC803 in a concentration dependent manner.SCU concentrations of 100,250,and 500 nmol/L were selected for subsequent experiments.Compared with the control group,the number of cell clones formed,scratch healing rate,number of invasive cells,IL-10 level and p-p65/p65 ratio all decreased in SCU-L group,SCU-M group,and SCU-H group,while IFN-γ and IL-4 increased(P<0.05).Compared with the SCU-H group,the number of cell clones,scratch healing rate,number of in-vasive cells,IL-10 level,and p-p65/p65 ratio obviously increased in the SCU-H+PMA group,while IFN-γ and IL-4 level significantly reduced(P<0.05).Conclusions SCU may inhibit the proliferation and migration of gastric cancer cell line MGC803.
7.Study on the association between heatwaves and fall-related mortality risk in seven provinces of China
Zhiying JIANG ; Ruilin MENG ; Ruoyi ZHANG ; Xuelong GU ; Jianxiong HU ; Min YU ; Yang CHEN ; Chunliang ZHOU ; Biao HUANG ; Ziyi LIANG ; Sujuan CHEN ; Jianhao LI ; Guanhao HE ; Tao LIU ; Hua GUO ; Wenjun MA
Chinese Journal of Epidemiology 2025;46(4):566-572
Objective:To evaluate the association between heatwaves and fall-related mortality.Methods:A total of 61 421 fall-related mortality from 2013 to 2022 in 7 provinces of China were included in a time-stratified case-crossover design, with daily meteorological data derived from the fifth generation European Reanalysis dataset produced by the European Centre for Medium-Range Weather Forecasts. Conditional logistic regression chimeric distributed lag nonlinear model was used to analyze the association between heatwaves and fall-related mortality and stratified analysis was conducted according to gender and age.Results:Heatwaves were associated with an increased risk of fall-related morality. The risk of fall-related mortality during heatwaves was higher than during non-heatwave periods ( OR=1.11, 95% CI: 1.05-1.18). The attributable fraction of fall-related motality due to heatwaves was 10.25% (95% CI: 4.49%-15.36%). For each 1 ℃ increase above the heatwave threshold, the risk of fall-related mortality increased by 34% ( OR=1.34, 95% CI: 1.02-1.76). The effect of heatwave duration on fall-related mortality was not statistically significant. Stratified analyses indicated that women experienced a higher risk of fall-related mortality during heatwaves ( OR=1.13, 95% CI: 1.04-1.22) compared to man ( OR=1.10, 95% CI: 1.04-1.17). Conclusions:Heatwave increases the risk of fall-related mortality, and the intensity of heatwaves modify this risk. Women are vulnerable populations.
8.The relationship between CT lung volume parameters and pulmonary function grade in patients with idiopathic pulmonary fibrosis and its prediction of acute exacerbation
Yafeng LIU ; Chunliang YAN ; Shaofei LI ; Xiyan REN ; Huijuan ZHANG ; Chunting TAN
Journal of Practical Radiology 2025;41(7):1215-1219
Objective To investigate the relationship between CT lung volume parameters(CT-LVP)and pulmonary function grade in patients with idiopathic pulmonary fibrosis(IPF)and its prediction of acute exacerbation.Methods A total of 204 patients with IPF were selected and divided into mild group(67 cases),moderate group(72 cases)and severe group(65 cases)according to the semi-quantitative scoring method of high-resolution computed tomography(HRCT).The correlation between CT-LVP and pul-monary function parameters(PFP)were analyzed.The predictive value of CT-LVP for acute exacerbation in severe IPF was ana-lyzed.Results The whole lung volume(WLV),normal lung volume(NLV)and normal lung volume percentage(NLV%)in severe group were lower than those in mild and moderate groups,whereas interstitial lung disease volume(ILDV)and interstitial lung disease volume percentage(ILDV%)were higher than those in mild and moderate groups,with statistical significance(P<0.05).WLV,NLV,ILDV,NLV%,ILDV%showed strong correlations with forced expiratory volume in 1 second percentage(FEV1%),forced expiratory volume in 1 second to forced vital capacity ratio(FEV1/FVC),diffusing capacity of the lung for carbon monoxide percent-age(DLCO%),and residual volume to total lung capacity ratio(RV/TLC).Receiver operating characteristic(ROC)curve analysis showed that the combination of WLV,NLV,ILDV,NLV%and ILDV%had higher accuracy in predicting acute exacerbation,area under the curve(AUC)>0.75(P<0.05).Conclusion CT-LVP is closely related to PFP,and the accuracy of CT-LVP combination in predicting acute exacerbation is high,which provides a theoretical basis for preventing acute exacerbation of IPF.
9.Comparative analysis of the efficacy of dienogest and LNG-IUS in the treatment of intrinsic and extrinsic subtypes of adenomyosis
Lu LIU ; Jing WANG ; Xinran GAO ; Molin WANG ; Meng LI ; Chunliang SHANG ; Hongyan GUO
Chinese Journal of Obstetrics and Gynecology 2025;60(4):281-288
Objective:To compare the efficacy of dienogest (DNG) and levonorgestrel-releasing intrauterine system (LNG-IUS) in the treatment of intrinsic and extrinsic subtypes of adenomyosis.Methods:Totally 232 patients were enrolled in the study who were diagnosed as adenomyosis by ultrasound or pelvic magnetic resonance imaging (MRI), and were classified into intrinsic and extrinsic subtypes according to different locations of lesions in MRI, treated with DNG (DNG group) or LNG-IUS (LNG-IUS group) in Peking University Third Hospital from July 2019 to December 2023. Clinical data of patients were retrospectively collected to analyze the clinical and imaging characteristics of different MRI subtypes of adenomyosis and whether there were differences in the therapeutic effects of DNG and LNG-IUS.Results:(1) Among the 232 patients enrolled, 129 were intrinsic subtype and 103 were extrinsic subtype. Among the 129 patients treated with DNG, the numbers of intrinsic and extrinsic subtype were 69 and 60, respectively. And among the 103 patients treated with LNG-IUS, the numbers of intrinsic and extrinsic subtype were 60 and 43, respectively. The mean age in DNG group [(37.5±5.6) years] was lower than that in LNG-IUS group [(40.3±4.3) years, P<0.001]. There were no significant differences in other clinical features (all P>0.05). (2) The visual analog scale (VAS) scores of dysmenorrhea and cancer antigen 125 (CA 125) levels in DNG group and LNG-IUS group were significantly decreased after treatment (all P<0.001), and hemoglobin levels were increased (both P<0.01). Compared between the two groups, the VAS score after treatment was lower in DNG group ( P<0.001), and the hemoglobin level was increased more significantly in DNG group ( P=0.016). The complete remission rates of dysmenorrhea in DNG group and LNG-IUS group were 73.0% (89/122) and 29.5% (28/95), respectively ( P=0.039). The incidence of irregular bleeding in DNG group was higher than LNG-IUS group, but there was no statistical significance [62.8% (81/129) vs 52.4% (54/103), P=0.112]. (3) Among patients with intrinsic adenomyosis, the incidence of menorrhagia was significantly higher than in those with extrinsic adenomyosis ( P<0.001), while the incidence and severity of dysmenorrhea were lower compared to extrinsic adenomyosis ( P=0.004, P=0.007, respectively). After treatment with DNG and LNG-IUS, there were no statistically significant differences in VAS scores between patients with intrinsic and extrinsic adenomyosis (all P>0.05). The incidence of irregular bleeding after DNG treatment was 78.3% (54/69) in intrinsic adenomyosis, which was higher than the 45.0% (27/60) observed in extrinsic adenomyosis ( P<0.01). Similarly, the incidence of irregular bleeding after LNG-IUS treatment was 63.3% (38/60) in intrinsic adenomyosis, higher than the 37.2% (16/43) in extrinsic adenomyosis ( P=0.009). (4) DNG treatment ( OR=19.163, 95% CI: 7.564-48.544; P<0.01) and duration of treatment ( OR=1.043, 95% CI: 1.012-1.075; P=0.007) were independent positive factors for complete remission of dysmenorrhea, while VAS score before treatment ( OR=0.654, 95% CI: 0.454-0.942; P=0.023) was negative factor. Intrinsic subtype was an independent risk factor for irregular bleeding ( OR=0.436, 95% CI: 0.235-0.811; P=0.009). Conclusions:DNG demonstrates greater advantages over LNG-IUS in terms of complete relief of dysmenorrhea and the degree of symptom alleviation. The incidence of irregular vaginal bleeding in patients with intrinsic adenomyosis is higher than in those with extrinsic adenomyosis. For patients with extrinsic adenomyosis, particularly those with prominent dysmenorrhea symptoms, DNG treatment offers greater benefits. However, for patients with intrinsic adenomyosis and those with significant menstrual disorders, a more cautious approach is required when selecting progestin therapy, along with enhanced monitoring and management.
10.Pollution status and distribution characteristics of indoor air bacteria in subway stations and compartments in a city of Central South China
Shuyan CHENG ; Zhuojia GUI ; Liqin SU ; Guozhong TIAN ; Tanxi GE ; Jiao LUO ; Ranqi SHAO ; Feng LI ; Weihao XI ; Chunliang ZHOU ; Wei PENG ; Minlan PENG ; Min YANG ; Bike ZHANG ; Xianliang WANG ; Xiaoyuan YAO
Journal of Environmental and Occupational Medicine 2024;41(7):801-806
Background Bacteria are the most diverse and widely sourced microorganisms in the indoor air of subway stations, where pathogenic bacteria can spread through the air, leading to increased health risks. Objective To understand the status and distribution characteristics of indoor air bacterial pollution in subway stations and compartments in a city of Central South China, and to provide a scientific basis for formulating intervention measures to address indoor air bacteria pollution in subways. Methods Three subway stations and the compartments of trains parking there in a city in Central South China were selected according to passenger flow for synchronous air sampling and monitoring. Temperature, humidity, wind speed, carbon dioxide (CO2), fine particulate matter (PM2.5), and inhalable particulate matter (PM10) were measured by direct reading method. In accordance with the requirements of Examination methods for public places-Part 3: Airborne microorganisms (GB/T 18204.3-2013), air samples were collected at a flow rate of 28.3 L·min−1, and total bacterial count was estimated. Bacterial microbial species were identified with a mass spectrometer and pathogenic bacteria were distinguished from non-pathogenic bacteria according to the Catalogue of pathogenic microorganisms transmitted to human beings issued by National Health Commission. Kruskal-Wallis H test was used to compare the subway hygiene indicators in different regions and time periods, and Bonferroni test was used for pairwise comparison. Spearman correlation test was used to evaluate the correlation between CO2 concentration and total bacterial count. Results The pass rates were 100.0% for airborne total bacteria count, PM2.5, and PM10 in the subway stations and train compartments, 94.4% for temperature and wind speed, 98.6% for CO2, but 0% for humidity. The overall median (P25, P75) total bacteria count was 177 (138,262) CFU·m−3. Specifically, the total bacteria count was higher in station halls than in platforms, and higher during morning peak hours than during evening peak hours (P<0.05). A total of 874 strains and 82 species were identified by automatic microbial mass spectrometry. The results of identification were all over 9 points, and the predominant bacteria in the air were Micrococcus luteus (52.2%) and Staphylococcus hominis (9.8%). Three pathogens, Acinetobacter baumannii (0.3%), Corynebacterium striatum (0.1%), and Staphylococcus epidermidis bacilli (2.2%) were detected in 23 samples (2.6%), and the associated locations were mainly distributed in train compartments during evening rush hours. Conclusion The total bacteria count in indoor air varies by monitoring sites of subway stations and time periods, and there is a risk of opportunistic bacterial infection. Attention should be paid to cleaning and disinfection during peak passenger flow hours in all areas.

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