BACKGROUND: Children's respiratory health demonstrates particular sensitivity to air pollution. Existing evidence investigating the association between short-term ozone (O₃) exposure and childhood pneumonia remains insufficient and inconsistent, especially in low- and middle-income countries (LMICs). METHOD: To provide more reliable and persuasive evidence, we implemented a multi-city, time-stratified case-crossover design with a large sample size, using data from seven representative children's hospitals across major geographical regions in China. To avoid the impact of the COVID-19 pandemic, individual-level medical records of inpatient children under 6 years of age diagnosed with pneumonia during 2016-2019 were collected. Conditional logistic regression models were fitted for each city, and city-specific estimates were pooled through a meta-analysis using a random-effects model. RESULTS: In total, the study included 137,470 pediatric pneumonia hospital admissions. The highest pooled estimate for O₃ occurred at lag0-1, with a 10 µg/m³ increase in O₃ associated with a 1.57% (95% CI: 0.67%-2.48%) higher risk of pediatric pneumonia hospital admissions. Stratified analyses indicated that the effects of O₃ were robust across different sexes, age groups, and admission seasons. We also observed a statistically significant increase in risk associated with O₃ concentrations exceeding the World Health Organization Air Quality Guidelines (WHO-AQGs). CONCLUSIONS This study revealed a significant positive association between O₃ and pediatric pneumonia hospital admissions. Our findings substantially strengthen the evidence base for the adverse health impacts of O₃, underscoring the importance of O₃ pollution control and management in reducing the public health burden of pediatric pneumonia.
Humans ; Ozone/analysis* ; China/epidemiology* ; Pneumonia/chemically induced* ; Child, Preschool ; Male ; Female ; Infant ; Cross-Over Studies ; Air Pollutants/analysis* ; Hospitalization/statistics & numerical data* ; Child ; Cities/epidemiology* ; Air Pollution/adverse effects* ; Infant, Newborn ; Environmental Exposure/adverse effects*

Objective:To explore the effects of different surgical methods on the treatment outcomes and prog-nosis in patients with caesarean section scar pregnancy(CSP).Methods:A total of 90 patients with type n or ⅢCSP admitted to Department of Obstetrics and Gynecology,Affiliated Hospital of Jinggangshan University be-tween February 1,2021 and February 1,2022 were selected as the study subjects.They were enrolled in order of inclusion,exclusion criteria,and admission treatment time.According to different treatment methods,they were di-vided into group A(30 cases),group B(30 cases)and group C(30 cases).The group A underwent laparoscopic uterine artery ligation(UAL)+focus excision and repair of scar pregnancy(FER)+uterine cicatricial repair(UCR),group B underwent uterine artery embolization(UAE)+hysteroscopic FER under ultrasonic monitoring,and group C underwent laparoscopic FER+UCR.The intraoperative and postoperative conditions,as well as the incidence of recurrent CSP(RCSP)rate and repregnancy rate during follow-up in the three groups were com-pared.Results:① The intraoperative blood loss,postoperative uterine drainage volume and postoperative VAS score in groups A and B were lower than those in group C,while the operation time and hospitalization cost were higher than those in group C(P＜0.05).The operation time and hospitalization cost in group A were lower than those in group B(P＜0.05).②The postoperative vaginal hemostasis time,menstrual recovery time and recovery time of serum β-human chorionic gonadotropin(β-HCG)in groups A and B were shorter than those in group C(P＜0.05).③There was no statistically significant difference in the incidence of postoperative complications such as adhesion,infection,severe bleeding,and lower abdominal pain among the three groups(P＞0.05).④The mean follow-up time after surgery was(17.60±5.61)months,and the incidence of RCSP in group A and group C was lower than that in group B(P＜0.05).The rate of repregnancy in group A,group B and group C was 82.14％(23/28),77.78％(21/27)and 81.48％(22/27),respectively,and there was no significant difference in the rate of repregnancy among the three groups(P＞0.05).Conclusions:Laparoscopic UAL+FER+UCR and UAE+ultrasound monitoring hysteroscopic FER can reduce intraoperative bleeding and promote postoperative re-covery,but the surgery time is prolonged and hospitalization costs are higher;After using UCR treatment,the inci-dence of RCSP is lower.Clinical evaluation should be based on the specific condition,economic conditions,and need to preserve fertility of type Ⅱ and Ⅲ CSP patients,and personalized treatment plans should be developed.

Objective:To explore the effects of different surgical methods on the treatment outcomes and prog-nosis in patients with caesarean section scar pregnancy(CSP).Methods:A total of 90 patients with type n or ⅢCSP admitted to Department of Obstetrics and Gynecology,Affiliated Hospital of Jinggangshan University be-tween February 1,2021 and February 1,2022 were selected as the study subjects.They were enrolled in order of inclusion,exclusion criteria,and admission treatment time.According to different treatment methods,they were di-vided into group A(30 cases),group B(30 cases)and group C(30 cases).The group A underwent laparoscopic uterine artery ligation(UAL)+focus excision and repair of scar pregnancy(FER)+uterine cicatricial repair(UCR),group B underwent uterine artery embolization(UAE)+hysteroscopic FER under ultrasonic monitoring,and group C underwent laparoscopic FER+UCR.The intraoperative and postoperative conditions,as well as the incidence of recurrent CSP(RCSP)rate and repregnancy rate during follow-up in the three groups were com-pared.Results:① The intraoperative blood loss,postoperative uterine drainage volume and postoperative VAS score in groups A and B were lower than those in group C,while the operation time and hospitalization cost were higher than those in group C(P＜0.05).The operation time and hospitalization cost in group A were lower than those in group B(P＜0.05).②The postoperative vaginal hemostasis time,menstrual recovery time and recovery time of serum β-human chorionic gonadotropin(β-HCG)in groups A and B were shorter than those in group C(P＜0.05).③There was no statistically significant difference in the incidence of postoperative complications such as adhesion,infection,severe bleeding,and lower abdominal pain among the three groups(P＞0.05).④The mean follow-up time after surgery was(17.60±5.61)months,and the incidence of RCSP in group A and group C was lower than that in group B(P＜0.05).The rate of repregnancy in group A,group B and group C was 82.14％(23/28),77.78％(21/27)and 81.48％(22/27),respectively,and there was no significant difference in the rate of repregnancy among the three groups(P＞0.05).Conclusions:Laparoscopic UAL+FER+UCR and UAE+ultrasound monitoring hysteroscopic FER can reduce intraoperative bleeding and promote postoperative re-covery,but the surgery time is prolonged and hospitalization costs are higher;After using UCR treatment,the inci-dence of RCSP is lower.Clinical evaluation should be based on the specific condition,economic conditions,and need to preserve fertility of type Ⅱ and Ⅲ CSP patients,and personalized treatment plans should be developed.

Objective:To explore the effects of different surgical methods on the treatment outcomes and prog-nosis in patients with caesarean section scar pregnancy(CSP).Methods:A total of 90 patients with type n or ⅢCSP admitted to Department of Obstetrics and Gynecology,Affiliated Hospital of Jinggangshan University be-tween February 1,2021 and February 1,2022 were selected as the study subjects.They were enrolled in order of inclusion,exclusion criteria,and admission treatment time.According to different treatment methods,they were di-vided into group A(30 cases),group B(30 cases)and group C(30 cases).The group A underwent laparoscopic uterine artery ligation(UAL)+focus excision and repair of scar pregnancy(FER)+uterine cicatricial repair(UCR),group B underwent uterine artery embolization(UAE)+hysteroscopic FER under ultrasonic monitoring,and group C underwent laparoscopic FER+UCR.The intraoperative and postoperative conditions,as well as the incidence of recurrent CSP(RCSP)rate and repregnancy rate during follow-up in the three groups were com-pared.Results:① The intraoperative blood loss,postoperative uterine drainage volume and postoperative VAS score in groups A and B were lower than those in group C,while the operation time and hospitalization cost were higher than those in group C(P＜0.05).The operation time and hospitalization cost in group A were lower than those in group B(P＜0.05).②The postoperative vaginal hemostasis time,menstrual recovery time and recovery time of serum β-human chorionic gonadotropin(β-HCG)in groups A and B were shorter than those in group C(P＜0.05).③There was no statistically significant difference in the incidence of postoperative complications such as adhesion,infection,severe bleeding,and lower abdominal pain among the three groups(P＞0.05).④The mean follow-up time after surgery was(17.60±5.61)months,and the incidence of RCSP in group A and group C was lower than that in group B(P＜0.05).The rate of repregnancy in group A,group B and group C was 82.14％(23/28),77.78％(21/27)and 81.48％(22/27),respectively,and there was no significant difference in the rate of repregnancy among the three groups(P＞0.05).Conclusions:Laparoscopic UAL+FER+UCR and UAE+ultrasound monitoring hysteroscopic FER can reduce intraoperative bleeding and promote postoperative re-covery,but the surgery time is prolonged and hospitalization costs are higher;After using UCR treatment,the inci-dence of RCSP is lower.Clinical evaluation should be based on the specific condition,economic conditions,and need to preserve fertility of type Ⅱ and Ⅲ CSP patients,and personalized treatment plans should be developed.

Objective:To explore the effects of different surgical methods on the treatment outcomes and prog-nosis in patients with caesarean section scar pregnancy(CSP).Methods:A total of 90 patients with type n or ⅢCSP admitted to Department of Obstetrics and Gynecology,Affiliated Hospital of Jinggangshan University be-tween February 1,2021 and February 1,2022 were selected as the study subjects.They were enrolled in order of inclusion,exclusion criteria,and admission treatment time.According to different treatment methods,they were di-vided into group A(30 cases),group B(30 cases)and group C(30 cases).The group A underwent laparoscopic uterine artery ligation(UAL)+focus excision and repair of scar pregnancy(FER)+uterine cicatricial repair(UCR),group B underwent uterine artery embolization(UAE)+hysteroscopic FER under ultrasonic monitoring,and group C underwent laparoscopic FER+UCR.The intraoperative and postoperative conditions,as well as the incidence of recurrent CSP(RCSP)rate and repregnancy rate during follow-up in the three groups were com-pared.Results:① The intraoperative blood loss,postoperative uterine drainage volume and postoperative VAS score in groups A and B were lower than those in group C,while the operation time and hospitalization cost were higher than those in group C(P＜0.05).The operation time and hospitalization cost in group A were lower than those in group B(P＜0.05).②The postoperative vaginal hemostasis time,menstrual recovery time and recovery time of serum β-human chorionic gonadotropin(β-HCG)in groups A and B were shorter than those in group C(P＜0.05).③There was no statistically significant difference in the incidence of postoperative complications such as adhesion,infection,severe bleeding,and lower abdominal pain among the three groups(P＞0.05).④The mean follow-up time after surgery was(17.60±5.61)months,and the incidence of RCSP in group A and group C was lower than that in group B(P＜0.05).The rate of repregnancy in group A,group B and group C was 82.14％(23/28),77.78％(21/27)and 81.48％(22/27),respectively,and there was no significant difference in the rate of repregnancy among the three groups(P＞0.05).Conclusions:Laparoscopic UAL+FER+UCR and UAE+ultrasound monitoring hysteroscopic FER can reduce intraoperative bleeding and promote postoperative re-covery,but the surgery time is prolonged and hospitalization costs are higher;After using UCR treatment,the inci-dence of RCSP is lower.Clinical evaluation should be based on the specific condition,economic conditions,and need to preserve fertility of type Ⅱ and Ⅲ CSP patients,and personalized treatment plans should be developed.

Objective:To explore the effects of different surgical methods on the treatment outcomes and prog-nosis in patients with caesarean section scar pregnancy(CSP).Methods:A total of 90 patients with type n or ⅢCSP admitted to Department of Obstetrics and Gynecology,Affiliated Hospital of Jinggangshan University be-tween February 1,2021 and February 1,2022 were selected as the study subjects.They were enrolled in order of inclusion,exclusion criteria,and admission treatment time.According to different treatment methods,they were di-vided into group A(30 cases),group B(30 cases)and group C(30 cases).The group A underwent laparoscopic uterine artery ligation(UAL)+focus excision and repair of scar pregnancy(FER)+uterine cicatricial repair(UCR),group B underwent uterine artery embolization(UAE)+hysteroscopic FER under ultrasonic monitoring,and group C underwent laparoscopic FER+UCR.The intraoperative and postoperative conditions,as well as the incidence of recurrent CSP(RCSP)rate and repregnancy rate during follow-up in the three groups were com-pared.Results:① The intraoperative blood loss,postoperative uterine drainage volume and postoperative VAS score in groups A and B were lower than those in group C,while the operation time and hospitalization cost were higher than those in group C(P＜0.05).The operation time and hospitalization cost in group A were lower than those in group B(P＜0.05).②The postoperative vaginal hemostasis time,menstrual recovery time and recovery time of serum β-human chorionic gonadotropin(β-HCG)in groups A and B were shorter than those in group C(P＜0.05).③There was no statistically significant difference in the incidence of postoperative complications such as adhesion,infection,severe bleeding,and lower abdominal pain among the three groups(P＞0.05).④The mean follow-up time after surgery was(17.60±5.61)months,and the incidence of RCSP in group A and group C was lower than that in group B(P＜0.05).The rate of repregnancy in group A,group B and group C was 82.14％(23/28),77.78％(21/27)and 81.48％(22/27),respectively,and there was no significant difference in the rate of repregnancy among the three groups(P＞0.05).Conclusions:Laparoscopic UAL+FER+UCR and UAE+ultrasound monitoring hysteroscopic FER can reduce intraoperative bleeding and promote postoperative re-covery,but the surgery time is prolonged and hospitalization costs are higher;After using UCR treatment,the inci-dence of RCSP is lower.Clinical evaluation should be based on the specific condition,economic conditions,and need to preserve fertility of type Ⅱ and Ⅲ CSP patients,and personalized treatment plans should be developed.

Objective:To explore the effects of different surgical methods on the treatment outcomes and prog-nosis in patients with caesarean section scar pregnancy(CSP).Methods:A total of 90 patients with type n or ⅢCSP admitted to Department of Obstetrics and Gynecology,Affiliated Hospital of Jinggangshan University be-tween February 1,2021 and February 1,2022 were selected as the study subjects.They were enrolled in order of inclusion,exclusion criteria,and admission treatment time.According to different treatment methods,they were di-vided into group A(30 cases),group B(30 cases)and group C(30 cases).The group A underwent laparoscopic uterine artery ligation(UAL)+focus excision and repair of scar pregnancy(FER)+uterine cicatricial repair(UCR),group B underwent uterine artery embolization(UAE)+hysteroscopic FER under ultrasonic monitoring,and group C underwent laparoscopic FER+UCR.The intraoperative and postoperative conditions,as well as the incidence of recurrent CSP(RCSP)rate and repregnancy rate during follow-up in the three groups were com-pared.Results:① The intraoperative blood loss,postoperative uterine drainage volume and postoperative VAS score in groups A and B were lower than those in group C,while the operation time and hospitalization cost were higher than those in group C(P＜0.05).The operation time and hospitalization cost in group A were lower than those in group B(P＜0.05).②The postoperative vaginal hemostasis time,menstrual recovery time and recovery time of serum β-human chorionic gonadotropin(β-HCG)in groups A and B were shorter than those in group C(P＜0.05).③There was no statistically significant difference in the incidence of postoperative complications such as adhesion,infection,severe bleeding,and lower abdominal pain among the three groups(P＞0.05).④The mean follow-up time after surgery was(17.60±5.61)months,and the incidence of RCSP in group A and group C was lower than that in group B(P＜0.05).The rate of repregnancy in group A,group B and group C was 82.14％(23/28),77.78％(21/27)and 81.48％(22/27),respectively,and there was no significant difference in the rate of repregnancy among the three groups(P＞0.05).Conclusions:Laparoscopic UAL+FER+UCR and UAE+ultrasound monitoring hysteroscopic FER can reduce intraoperative bleeding and promote postoperative re-covery,but the surgery time is prolonged and hospitalization costs are higher;After using UCR treatment,the inci-dence of RCSP is lower.Clinical evaluation should be based on the specific condition,economic conditions,and need to preserve fertility of type Ⅱ and Ⅲ CSP patients,and personalized treatment plans should be developed.

Objective:To explore the effects of different surgical methods on the treatment outcomes and prog-nosis in patients with caesarean section scar pregnancy(CSP).Methods:A total of 90 patients with type n or ⅢCSP admitted to Department of Obstetrics and Gynecology,Affiliated Hospital of Jinggangshan University be-tween February 1,2021 and February 1,2022 were selected as the study subjects.They were enrolled in order of inclusion,exclusion criteria,and admission treatment time.According to different treatment methods,they were di-vided into group A(30 cases),group B(30 cases)and group C(30 cases).The group A underwent laparoscopic uterine artery ligation(UAL)+focus excision and repair of scar pregnancy(FER)+uterine cicatricial repair(UCR),group B underwent uterine artery embolization(UAE)+hysteroscopic FER under ultrasonic monitoring,and group C underwent laparoscopic FER+UCR.The intraoperative and postoperative conditions,as well as the incidence of recurrent CSP(RCSP)rate and repregnancy rate during follow-up in the three groups were com-pared.Results:① The intraoperative blood loss,postoperative uterine drainage volume and postoperative VAS score in groups A and B were lower than those in group C,while the operation time and hospitalization cost were higher than those in group C(P＜0.05).The operation time and hospitalization cost in group A were lower than those in group B(P＜0.05).②The postoperative vaginal hemostasis time,menstrual recovery time and recovery time of serum β-human chorionic gonadotropin(β-HCG)in groups A and B were shorter than those in group C(P＜0.05).③There was no statistically significant difference in the incidence of postoperative complications such as adhesion,infection,severe bleeding,and lower abdominal pain among the three groups(P＞0.05).④The mean follow-up time after surgery was(17.60±5.61)months,and the incidence of RCSP in group A and group C was lower than that in group B(P＜0.05).The rate of repregnancy in group A,group B and group C was 82.14％(23/28),77.78％(21/27)and 81.48％(22/27),respectively,and there was no significant difference in the rate of repregnancy among the three groups(P＞0.05).Conclusions:Laparoscopic UAL+FER+UCR and UAE+ultrasound monitoring hysteroscopic FER can reduce intraoperative bleeding and promote postoperative re-covery,but the surgery time is prolonged and hospitalization costs are higher;After using UCR treatment,the inci-dence of RCSP is lower.Clinical evaluation should be based on the specific condition,economic conditions,and need to preserve fertility of type Ⅱ and Ⅲ CSP patients,and personalized treatment plans should be developed.

Objective:To explore the effects of different surgical methods on the treatment outcomes and prog-nosis in patients with caesarean section scar pregnancy(CSP).Methods:A total of 90 patients with type n or ⅢCSP admitted to Department of Obstetrics and Gynecology,Affiliated Hospital of Jinggangshan University be-tween February 1,2021 and February 1,2022 were selected as the study subjects.They were enrolled in order of inclusion,exclusion criteria,and admission treatment time.According to different treatment methods,they were di-vided into group A(30 cases),group B(30 cases)and group C(30 cases).The group A underwent laparoscopic uterine artery ligation(UAL)+focus excision and repair of scar pregnancy(FER)+uterine cicatricial repair(UCR),group B underwent uterine artery embolization(UAE)+hysteroscopic FER under ultrasonic monitoring,and group C underwent laparoscopic FER+UCR.The intraoperative and postoperative conditions,as well as the incidence of recurrent CSP(RCSP)rate and repregnancy rate during follow-up in the three groups were com-pared.Results:① The intraoperative blood loss,postoperative uterine drainage volume and postoperative VAS score in groups A and B were lower than those in group C,while the operation time and hospitalization cost were higher than those in group C(P＜0.05).The operation time and hospitalization cost in group A were lower than those in group B(P＜0.05).②The postoperative vaginal hemostasis time,menstrual recovery time and recovery time of serum β-human chorionic gonadotropin(β-HCG)in groups A and B were shorter than those in group C(P＜0.05).③There was no statistically significant difference in the incidence of postoperative complications such as adhesion,infection,severe bleeding,and lower abdominal pain among the three groups(P＞0.05).④The mean follow-up time after surgery was(17.60±5.61)months,and the incidence of RCSP in group A and group C was lower than that in group B(P＜0.05).The rate of repregnancy in group A,group B and group C was 82.14％(23/28),77.78％(21/27)and 81.48％(22/27),respectively,and there was no significant difference in the rate of repregnancy among the three groups(P＞0.05).Conclusions:Laparoscopic UAL+FER+UCR and UAE+ultrasound monitoring hysteroscopic FER can reduce intraoperative bleeding and promote postoperative re-covery,but the surgery time is prolonged and hospitalization costs are higher;After using UCR treatment,the inci-dence of RCSP is lower.Clinical evaluation should be based on the specific condition,economic conditions,and need to preserve fertility of type Ⅱ and Ⅲ CSP patients,and personalized treatment plans should be developed.

Objective To compare the effect of postoperative between total intravenous anesthesia(TIVA)use of alfentanil and remifentanil undergoing endoscopic sinus surgery.Methods A total of 130 and thirty patients scheduled for endoscopic sinus surgery,62 males and 68 females,aged 18-64 years,BMI 18-30 kg/m2,ASA physical status Ⅰ or Ⅱ,were randomly divided into two groups:alfentanil group(group A)and remifentanil group(group R).Midazolam 0.02 mg/kg,propofol target-controlled infusion(TCI)3 μg/ml,alfentanil 20 μg/kg,and rocuronium 0.6 mg/kg were injected intravenously in group A,and target-controlled infusion of propofol combined with alfentanil was used to maintain anesthesia.Midazo-lam 0.02 mg/kg,propofol TCI 3 μg/ml,remifentanil 1 μg/kg,and rocuronium 0.6 mg/kg were injected intravenously in group R,and target-controlled infusion of propofol combined with remifentanil was used to maintain anesthesia.The number of intraoperative hemodynamic adverse reactions such as hypertension,tachycardia,hypotension,bradycardia during operation,and pain degree at 30 minutes,60 minutes,24 hours after operation,extubation time,and rescue analgesia and adverse reactions such as nausea and vomi-ting,skin pruritus,respiratory depression within 24 hours after operation were recorded.Results Compared with group R,the incidence of intraoperative hypotension in group A was significantly lower(P＜0.05),the incidence of painless in group A 30 and 60 minutes after operation was significantly higher(P＜0.05),the incidence of mild and moderate pain was significantly decreased(P＜0.05),and the recovery time was significantly prolonged(P＜0.05).There was no significant difference in rescue analgesia within 24 hours after operation.There were no significant differences in the incidence of postoperative nausea and vomiting,postoperative skin pruritus,and respiratory depression between the two groups.Conclusion In endoscopic sinus surgery,the effect of total intravenous anesthesia with alfentanil on postoperative analgesia is better than that of remifentanil,and the incidence of perioperative and postoperative adverse reactions in alfentanil is lower than that of remifentanil,while the recovery time of alfentanil is slightly longer than that of remifentanil.