1.Treatment Principles and Paradigm of Diabetic Microvascular Complications Responding Specifically to Traditional Chinese Medicine
Anzhu WANG ; Xing HANG ; Lili ZHANG ; Xiaorong ZHU ; Dantao PENG ; Ying FAN ; Min ZHANG ; Wenliang LYU ; Guoliang ZHANG ; Xiai WU ; Jia MI ; Jiaxing TIAN ; Wei ZHANG ; Han WANG ; Yuan XU ; .LI PINGPING ; Zhenyu WANG ; Ying ZHANG ; Dongmei SUN ; Yi HE ; Mei MO ; Xiaoxiao ZHANG ; Linhua ZHAO
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(5):272-279
To explore the advantages of traditional Chinese medicine (TCM) and integrative TCM-Western medicine approaches in the treatment of diabetic microvascular complications (DMC), refine key pathophysiological insights and treatment principles, and promote academic innovation and strategic research planning in the prevention and treatment of DMC. The 38th session of the Expert Salon on Diseases Responding Specifically to Traditional Chinese Medicine, hosted by the China Association of Chinese Medicine, was held in Beijing, 2024. Experts in TCM, Western medicine, and interdisciplinary fields convened to conduct a systematic discussion on the pathogenesis, diagnostic and treatment challenges, and mechanism research related to DMC, ultimately forming a consensus on key directions. Four major research recommendations were proposed. The first is addressing clinical bottlenecks in the prevention and control of DMC by optimizing TCM-based evidence evaluation systems. The second is refining TCM core pathogenesis across DMC stages and establishing corresponding "disease-pattern-time" framework. The third is innovating mechanism research strategies to facilitate a shift from holistic regulation to targeted intervention in TCM. The fourth is advancing interdisciplinary collaboration to enhance the role of TCM in new drug development, research prioritization, and guideline formulation. TCM and integrative approaches offer distinct advantages in managing DMC. With a focus on the diseases responding specifically to TCM, strengthening evidence-based support and mechanism interpretation and promoting the integration of clinical care and research innovation will provide strong momentum for the modernization of TCM and the advancement of national health strategies.
2.Imaging Measurement of the Safe Distances of Acupuncture at Fengfu (GV 16) in Children Aged 4 to 8 Based on CT Three-Dimensional Reconstruction
Kun LI ; Tianyi WANG ; Xing WANG ; Zhijun LI ; Peng WU ; Yang YANG ; Yunteng HAO ; Hailong ZHAO ; Yuan MA ; Shaojie ZHANG
Journal of Traditional Chinese Medicine 2026;67(14):1523-1527
ObjectiveTo measure the distance from the surface of Fengfu (GV 16) to the deep important bony structures in children aged 4 to 8 years based on CT three-dimensional reconstruction technology, thereby providing imaging reference data for clinical acupuncture safe operations in terms of different age groups and needle insertion angles. MethodsCervical CT image data were collected from healthy children aged 4 to 8 years with five age groups (4-, 5-, 6-, 7-, 8-year-old groups), 20 cases in each group. The images were imported into Mimics 21.0 software for three-dimensional reconstruction. The straight-line distances from the skin model surface of the Fengfu (GV 16) to the first underlying bony barrier (such as the lower edge of the occipital bone, the posterior arch of the atlas vertebra) were measured at intervals of 5° on both the transverse section (0° ± 35°) and the sagittal section (40° upward to 40° downward on the diagonal). The correlation between the measured distance, age, and angle was analyzed. ResultsIn the transverse and sagittal sections, the measured distance from the skin surface to the underlying bone of Fengfu (GV 16) at each angle increased with age. In the transverse section, the increase was relatively small within the 0° to 20° angle range, whereas a more pronounced increase was observed when the angle exceeded 20°; at measurement angles of 30° to 35°, the distance of the skin surface to the bone at Fengfu (GV 16) in the 7- and 8-year-old groups was significantly greater than that in the 4-year-old group (P<0.05). In the sagittal section, the measured distance from the skin surface to the bone at Fengfu (GV 16) was shortest and changed greatly at oblique upward angles of 15° to 40° within each age group, and increased markedly at near-vertical angles of 0° to 10°; it was longest at oblique downward angles of -40° to -5° and showed relatively gradual changes. ConclusionThis study obtained the imaging distance data from Fengfu (GV 16) to the surrounding bony structures in children aged 4 to 8 years through three-dimensional modeling, finding that this distance has clear age and angle dependence, which can provide quantitative evidence for developing individualized and precise safe acupuncture schemes at Fengfu (GV 16) in pediatric clinical practice.
3.Imaging Measurement of the Safe Distances of Acupuncture at Fengfu (GV 16) in Children Aged 4 to 8 Based on CT Three-Dimensional Reconstruction
Kun LI ; Tianyi WANG ; Xing WANG ; Zhijun LI ; Peng WU ; Yang YANG ; Yunteng HAO ; Hailong ZHAO ; Yuan MA ; Shaojie ZHANG
Journal of Traditional Chinese Medicine 2026;67(14):1523-1527
ObjectiveTo measure the distance from the surface of Fengfu (GV 16) to the deep important bony structures in children aged 4 to 8 years based on CT three-dimensional reconstruction technology, thereby providing imaging reference data for clinical acupuncture safe operations in terms of different age groups and needle insertion angles. MethodsCervical CT image data were collected from healthy children aged 4 to 8 years with five age groups (4-, 5-, 6-, 7-, 8-year-old groups), 20 cases in each group. The images were imported into Mimics 21.0 software for three-dimensional reconstruction. The straight-line distances from the skin model surface of the Fengfu (GV 16) to the first underlying bony barrier (such as the lower edge of the occipital bone, the posterior arch of the atlas vertebra) were measured at intervals of 5° on both the transverse section (0° ± 35°) and the sagittal section (40° upward to 40° downward on the diagonal). The correlation between the measured distance, age, and angle was analyzed. ResultsIn the transverse and sagittal sections, the measured distance from the skin surface to the underlying bone of Fengfu (GV 16) at each angle increased with age. In the transverse section, the increase was relatively small within the 0° to 20° angle range, whereas a more pronounced increase was observed when the angle exceeded 20°; at measurement angles of 30° to 35°, the distance of the skin surface to the bone at Fengfu (GV 16) in the 7- and 8-year-old groups was significantly greater than that in the 4-year-old group (P<0.05). In the sagittal section, the measured distance from the skin surface to the bone at Fengfu (GV 16) was shortest and changed greatly at oblique upward angles of 15° to 40° within each age group, and increased markedly at near-vertical angles of 0° to 10°; it was longest at oblique downward angles of -40° to -5° and showed relatively gradual changes. ConclusionThis study obtained the imaging distance data from Fengfu (GV 16) to the surrounding bony structures in children aged 4 to 8 years through three-dimensional modeling, finding that this distance has clear age and angle dependence, which can provide quantitative evidence for developing individualized and precise safe acupuncture schemes at Fengfu (GV 16) in pediatric clinical practice.
4.Semaphorin 3A promotes pathological cardiac hypertrophy: an experimental study
Lifei WU ; Jiaojiao ZHANG ; Xing ZHANG ; Donghang LI ; Hongbo WANG ; Jimin CAO
Acta Universitatis Medicinalis Anhui 2026;61(7):1215-1222
ObjectiveTo investigate the effect of Semaphorin 3A (Sema3A) on the progression of pathological cardiac hypertrophy. MethodsWild-type C57BL 6J mice, Sema3A global overexpressing (Sema3A/Cre-ERTM) mice, and their littermate controls (Cre-ERTM) were used, with 6 mice per group. A pressure-overload induced cardiac hypertrophy model was established via transverse aortic constriction (TAC), with a sham-operated group (Sham) as the control. Cardiac hypertrophy was assessed by gross morphology, heart weight/body weight ratio (HW/BW), heart weight/tibia length ratio (HW/HL), and heart weight/lung weight ratio (HW/PW). Cardiac function was evaluated by measuring ejection fraction (EF) and fractional shortening (FS) via echocardiography. In heart tissues, the mRNA level of atrial natriuretic peptide (ANP) and Sema3A were detected by RT-qPCR, Sema3A protein level was detected by western blot, morphological structure was detected by hematoxylin and eosin (HE) staining, level of fibrosis was detected by Masson’s trichrome staining, and angiogenesis was detected by immunohistochemical detection of CD31. For in vitro experiments, rat H9C2 cardiomyocytes were treated with angiotensin Ⅱ (Ang Ⅱ) to induce hypertrophy, with PBS-treated cells as the control. After 48 hours, the mRNA expression of ANP, B-type natriuretic peptide (BNP) and Sema3A were measured by RT-qPCR, and Sema3A protein level was assessed by western blot. ResultsAt the animal level, compared with the sham group, mice subjected to TAC showed significantly increased mRNA levels of ANP in cardiac tissue, as well as markedly elevated mRNA and protein levels of Sema3A (all P<0.05). Compared with the Cre-ERTM + TAC group, the Sema3A/Cre-ERTM + TAC group exhibited more pronounced cardiac hypertrophy, greater ventricular wall thickening, higher HW/BW, HW/HL, and HW/PW ratios, more significant reductions in EF and FS, more severe cardiac fibrosis, and a significant decrease in cardiac CD31 expression levels (all P<0.05). At the cellular level, compared with the control group, H9C2 cells treated with Ang Ⅱ displayed significantly increased mRNA levels of ANP and BNP, along with markedly elevated mRNA and protein levels of Sema3A (all P<0.05). ConclusionSema3A promotes the progression of pressure overload-induced cardiac hypertrophy by inhibiting angiogenesis.
5.Role of ferroptosis in reduction of intestinal ischemia-reperfusion injury by sodium butyrate pretreatment in mice
Zicen ZHAO ; Yufang LENG ; Liya CHANG ; Yu WANG ; Dongbin LI ; Yang XING ; Yuxuan WU
Chinese Journal of Anesthesiology 2025;45(2):203-207
Objective:To evaluate the role of ferroptosis in reduction of intestinal ischemia-reperfusion injury (IRI) by sodium butyrate pretreatment in mice.Methods:Thirty SPF healthy male C57BL/6 mice, aged 6-8 weeks, weighing 20-23 g, were divided into 5 groups ( n=6 each) using a random number table method: sham operation group (S group), intestinal IRI group (IR group), intestinal IRI + sodium butyrate pretreatment group (IN group), intestinal IRI + sodium butyrate pretreatment+ FER-1 group (INF group), and intestinal IRI + sodium butyrate pretreatment + Erastin group (INE group). The intestinal IRI model was established by occluding the superior mesenteric artery for 45 min followed by reperfusion for 30 min in S group. In IN, INF and INE groups, sodium butyrate was administered by gavage at a dose of 500 mg/kg daily at 1 week before developing the model, while the equal volume of normal saline was given by gavage in the other two groups. The ferroptosis inhibitor FER-1 5 mg/kg and ferroptosis agonist Erastin 30 mg/kg were intraperitoneally injected at 1 h prior to ischemia in INF and INE groups. Mice were sacrificed after anesthesia at the end of reperfusion to obtain small intestinal tissues for examination of the pathological changes (using light microscopy) which were scored according to Chiu and for determination of the contents of Fe 2+, malondialdehyde (MDA), glutathione (GSH) and glutathione disulfide(GSSG) (by enzyme-linked immunosorbent assay), expression of glutathione peroxidase 4 (GPX4), solute carrier family 7 member 11 (SLC7A11), and ferritin heavy chain 1 (FTH1) (by Western blot). The ratio of GSH to GSSG was calculated. Results:Compared to S group, Chiu′s scores and contents of MDA and Fe 2+ were significantly increased, the expression of GSH, GPX4, FTH1 and SLC7A11 was down-regulated, and the GSH/GSSG ratio was decreased in IR group ( P<0.001). Compared to IR group, Chiu′s scores and contents of MDA and Fe 2+ were significantly decreased, the expression of GSH, GPX4, FTH1 and SLC7A11 was up-regulated, and the GSH/GSSG ratio was increased in IN and INF groups ( P<0.001). Compared to IN group, Chiu′s scores and contents of MDA and Fe 2+ were significantly increased, the expression of GSH, GPX4, FTH1 and SLC7A11 was down-regulated, and the GSH/GSSG ratio was decreased in INE group ( P<0.001). Conclusions:Ferroptosis is involved in sodium butyrate pretreatment-induced reduction of intestinal I/RI in mice.
6.Impacts of ionizing radiation dose on NADPH oxidase expression in mouse intestine
Zhuojun WU ; Zhifei HUANG ; Jiangyi LI ; Xing WANG ; Ling GUO ; Guirong DING
Chinese Journal of Radiological Medicine and Protection 2025;45(5):399-407
Objective:To investigate the effects of different doses of ionizing radiation on the changes in nicotinamide adenine dinucleotide phosphate (NADPH) oxidase and reactive oxygen species (ROS) levels in the intestines of mice.Methods:C57BL/6 mice aged 6-8 weeks were randomly assigned to four groups (0 Gy, 0.1 Gy, 0.2 Gy, and 0.5 Gy; n=10/group) and subjected to single whole-body irradiation using a 60Co γ-ray source at a dose rate of 13 mGy/min. At 20 weeks post-irradiation, jejunal, ileal, and colonic tissues were collected. Immunohistochemistry, Western blotting, and reverse transcription-polymerase chain reaction (RT-PCR) were employed to assess mRNA and protein expression of NADPH oxidase components. Hydrogen peroxide (H 2O 2) levels and the expression of Nuclear Factor-kappa B (NF-κB), a transcriptional regulator of Dual Oxidase 2 (DUOX2), were also measured. Results:Compared with the 0 Gy group, mice in the 0.5 Gy group exhibited shortened villus length in the jejunum, villus fusion in the ileum, and increased crypt spacing in the colon, with statistically significant differences ( t=2.48, P < 0.05). No significant differences were observed in other dose groups compared to the 0 Gy group ( P > 0.05).The expression of H 2O 2 in the jejunum, ileum, and colon of the 0.1 Gy group was significantly elevated compared to the 0 Gy group ( t=4.12, 3.12, 3.12; P < 0.05). In the 0.5 Gy group, H 2O 2 expression in the jejunum and colon increased nearly twofold relative to the 0 Gy group ( t=8.67, 8.69; P < 0.05).At 20 weeks post-irradiation, DUOX2 protein expression levels in the jejunum, ileum, and colon were markedly higher in irradiated mice than in the 0 Gy group ( t=3.03, 10.29, 2.74; P < 0.05). DUOX2 mRNA levels in the jejunum, ileum, and colon of the 0.1 Gy group were significantly upregulated compared to the 0 Gy group ( t=12.75, 4.12, 11.14; P < 0.05). Additionally, NOX4 mRNA expression increased in the jejunum of the 0.2 Gy group ( t=4.54, P < 0.05) and in the ileum of the 0.1 Gy group ( t=4.13, P < 0.05).The nuclear factor kappa-B (NF-κB), a transcriptional regulator of DUOX2, showed an upward trend in expression in the jejunum, ileum, and colon of the 0.1 Gy group compared to the 0 Gy group, with statistically significant differences ( t=8.73, 8.18, 7.02; P < 0.05). Conclusion:Low-dose radiation induces long-term effects on the intestinal tract. Specifically, 0.5 Gy irradiation causes mild morphological alterations in the jejunum, ileum, and colon, while 0.1 Gy irradiation promotes the upregulation of DUOX2, a NADPH oxidase, in intestinal tissues.
7.Application of holographic imaging digital localization technology in robotic partial nephrectomy for completely endophytic renal tumor
Zhengsheng LIU ; Shuaishuai SONG ; Xuegang WANG ; Kaiyan ZHANG ; Wei LI ; Zhun WU ; Bin CHEN ; Tao WANG ; Jinchun XING
Chinese Journal of Urology 2025;46(5):376-382
Objective:To evaluate the clinical value of holographic imaging-based digital localization technology in robot-assisted partial nephrectomy(RAPN)for the treatment of completely endophytic renal tumors.Methods:A retrospective analysis was conducted on the clinical data of 23 patients with completely endophytic renal tumors who underwent RAPN at the First Affiliated Hospital of Xiamen University between December 2022 and December 2024. Patients were divided into two groups based on the use of holographic imaging:the holographic imaging group(16 cases)and the conventional group(7 cases). There was no statistically significant difference between the holographic imaging group and the conventional group in terms of age[(41.9 ± 13.4)years vs.(46.9 ± 13.4)years],body mass index[(25.6 ± 4.8)kg/m2 vs.(24.7 ± 3.1)kg/m2],maximum tumor diameter[(3.1 ± 0.9)cm vs.(3.0 ± 9.0)cm],tumor volume[(13.2 ± 9.0)cm3 vs.(34.9 ± 9.9)cm3],R.E.N.A.L. score[(9.4 ± 1.2)points vs.(9.9 ± 0.7)points],PADUA score[(10.4 ± 0.7)points vs.(9.4 ± 0.7)points],proportion of T 1a stage patients[12 cases(75.0%)vs. 6 cases(85.7%)]and preoperative serum creatinine[(67.4 ± 9.5)μmol/L vs.(78.0 ± 16.0)μmol/L]. In the holographic group,holographic models were reconstructed based on preoperative enhanced CT or MRI images and used for preoperative planning and intraoperative localization. In the conventional group,surgeons relied on preoperative CT or MRI images for cognitive fusion during RAPN. Perioperative parameters such as warm ischemia time,operative time,tumor localization time,positive surgical margin rate,and renal function were compared between the two groups. Results:The operative time in the holographic group was significantly shorter than that in the conventional group[(152.8 ± 12.9)min vs.(218.4 ± 105.5)min, P = 0.001]. Warm ischemia time[(26.9 ± 3.4)min vs.(30.7 ± 3.8)min, P < 0.001],localization time[(4.2 ± 0.9)min vs.(8.9 ± 1.7)min, P < 0.001],and estimated blood loss[(47.0 ± 17.7)ml vs.(128.6 ± 87.8)ml, P < 0.001]were also significantly lower in the holographic group. In the conventional group,one patient underwent radical nephrectomy,while no patient in the holographic imaging group required conversion to radical nephrectomy. No cases of positive surgical margins were identified in either group. Serum creatinine levels measured one month after surgery showed no statistically significant differences between the two groups[(79.5 ± 15.7)μmol /L vs.(104.9 ± 22.5)μmol /L]. Conclusions:The application of holographic imaging-based digital localization technology in RAPN for completely endophytic renal tumors significantly reduces operative time,localization time,warm ischemia time,and intraoperative blood loss. This technology improves surgical efficiency and success rates,offering distinct clinical advantages.
8.Evaluation of early outcomes and discussion of revisions of total hip arthroplasty in treatment for Kashin-Beck disease with hip problem
Haotian WU ; Xiaoyuan ZHANG ; Hui LI ; Yan KE ; Kai WANG ; Dan XING ; Zhichang LI ; Jianhao LIN
Chinese Journal of Orthopaedics 2025;45(6):335-342
Objective:To evaluate the early outcomes of total hip arthroplasty (THA) and discuss the revisions post THA in the treatment for Kashin-Beck disease (KBD) with severe hip problems.Methods:This retrospective cohort study enrolled 50 patients (64 hips) with a mean age of 52.4±8.7 years, including 25 male patients and 25 female patients (36 left hips and 28 right hips), who were diagnosed as KBD with hip problems and received THA at Arthritis Clinical and Research Centre, Peking University People's Hospital from October 2019 to January 2024. The leg length discrepancy (LLD), femoral offset (FO), abduction angle and anteversion angle were calculated preoperatively and one week post-operation. The postoperative radiological indexes and the functional outcomes in the last follow-up were compared with the preoperative assessment.Results:The surgical duration was 105(80, 120) min and the bleeding amount was 300(200, 400) ml. All the cases were followed up for an average of 37 months (ranging from 21 to 44 months). Significant differences were found on postoperative radiological images, with LLD improving to 0.50±0.78 cm from a preoperative value of -1.36±0.79 cm, and FO increasing to 3.28±1.01 cm from 2.72±0.83 cm ( P<0.05). The mean postoperative abduction angle and anteversion angle were 42.5°±7.7° and 15.1°±5.9°, respectively. A total of 71.8% and 95.3% hips fell within the Lewinnek safe zones of abduction angle and anteversion angle, respectively. In terms of functional outcomes, the average range of motion improved significantly to 185°(173°, 210°) from a preoperative value of 99°(76°, 123°), and the Harris Hip Score increased from 35(26, 43) preoperatively to 70(63, 80) postoperatively ( P<0.05). During the follow-up, there were complications for two cases of femoral stem loosening, one case of periprosthetic femoral fracture, one case of hip dislocation, and one case of acetabular component loosening with hip subluxation. Additionally, seven patients exhibited Trendelenburg gait. A total of five hips required revision surgery due to severe complications, including two cases of femoral stem loosening, one case of periprosthetic femoral fracture, one case of hip dislocation, and one case of acetabular component loosening with subluxation. Conclusions:Patients with KBD demonstrated significant early improvements in both radiological and functional outcomes following THA.
9.Study on the relationship between parenting styles of toddlers aged 30 months and attention deficit hyperactivity disorder symptom trajectories in preschool children
Han LI ; Juan TONG ; Xing WANG ; Shuangqin YAN ; Kun HUANG ; Xiaoyan WU ; Shuman TAO ; Beibei ZHU ; Hui GAO ; Fangbiao TAO
Chinese Journal of Epidemiology 2025;46(4):709-716
Objective:To explore the relationship between parenting styles of toddlers aged 30 months and attention deficit hyperactivity disorder (ADHD) symptom trajectories in preschool children.Methods:The subjects were 2 111 children and their parents in Ma'anshan Birth Cohort. Parenting styles were assessed at 30 months of age using the Brief Toddler Parenting Style Questionnaire, which defines parenting styles on four dimensions: warmth and interaction, attention and acceptance, outdoor and social activities, and neglect and restrictions. The Chinese version of the Conners Abbreviated Symptom Questionnaire was used to examine preschooler's ADHD symptoms aged 3, 5, and 6 years. ADHD symptom trajectories were fitted using group-based trajectory modeling. The multinomial logistic regression model was used to evaluate the relationship between parenting styles at 30 months of age and ADHD symptom trajectories in children. The additive and multiplicative models were applied to analyze the interaction effect of negative parenting styles in children's ADHD symptom trajectories.Results:ADHD symptom trajectories in children included the low-score (48.3%), moderate-score (47.7%), and high-score groups (4.0%). After adjusting for the confounding factors, the results of the multinomial logistic regression analysis showed that negative parenting styles of the father/mother were associated with ADHD symptom trajectories in children ( P<0.05). The father/mother's low warmth and interaction (father: OR=2.07,95% CI:1.68-2.54; mother: OR=2.02,95% CI:1.64-2.48), low attention and acceptance (father: OR=1.94,95% CI:1.57-2.39; mother: OR=1.47,95% CI:1.20-1.81), low outdoor and social (father: OR=1.74,95% CI:1.43-2.13; mother: OR=1.60,95% CI:1.32-1.94), and high neglect and restriction (father: OR=2.09,95% CI:1.67-2.62; mother: OR=2.06,95% CI:1.65-2.56) were associated with ADHD symptom moderate-score trajectories compared to the low-score trajectory group, mother's low warmth and interaction, low outdoor and social, and high neglect and restrictions. Statistically significant association was seen in negative parenting styles of fathers with the high-score group. There was a multiplicative interaction for hostile parenting ( P<0.05). The additive interaction results showed that there was a synergistic effect of hostile parenting, which increased the risk of the high-score trajectories of ADHD symptoms in children. Conclusions:Both parents' parenting styles influenced ADHD symptom change the trajectories in preschoolers. Negative parenting styles of the father/mother increase the risk of the moderate-score and high-score trajectories of ADHD symptoms in children. Hostile parenting by both parents has a synergistic impact on the risk of ADHD symptom trajectories in children, and the simultaneous presence of both increases the risk of the high-score trajectory of ADHD symptoms.
10.Study of association of sedentary time and physical activity with development of chronic obstructive pulmonary disease in non-smoking women aged 40 years and above in Songjiang District, Shanghai
Xinyue PANG ; Xin YIN ; Jing LI ; Xing LIU ; Yiling WU ; Qi ZHAO ; Yonggen JIANG ; Genming ZHAO ; Zhongxing SUN ; Na WANG ; Qingwu JIANG
Chinese Journal of Epidemiology 2025;46(9):1546-1553
Objective:To analyze the association of sedentary time and physical activity with the risk of developing chronic obstructive pulmonary disease (COPD) in non-smoking women aged 40 years and above in Songjiang District, Shanghai.Methods:Based on a natural population-based cohort in Songjiang, a total of 18 707 non-smoking women who were aged 40 years and above and without COPD at baseline survey were enrolled in the study. Cox proportional risk regression model was used to analyze the associations of the duration of sedentary behavior, physical activity with the risk for COPD at baseline survey, and the hazard ratio ( HR) of risk for COPD and its 95% CI were calculated. Stratified analyses were performed based on age, BMI, history of respiratory diseases and so on. Sensitivity analyses were conducted by excluding the cases diagnosed with COPD within one year after the baseline survey. Results:As of March 31, 2024, a total of 691 new COPD cases had been recorded after a median follow-up time of 6.96 years with an incidence density of 53.22 per 10 000 person-years. After adjusting for relevant confounders, in the tertile subgroups of sedentary time, the risk for COPD reduced by 17% in the short sedentary time group compared with the long sedentary time group ( HR=0.83,95% CI:0.70-0.99). Compared with the low physical activity level and long sedentary time group, the risk for COPD reduced by 24% in the high physical activity level and short sedentary time group ( HR=0.76, 95% CI: 0.61-0.95) and by 23% in the low physical activity level and short sedentary time group ( HR=0.77, 95% CI: 0.60-0.97). Compared with the non-physical exercise and long sedentary time group, the risk for COPD reduced by 28% in the non-physical exercise and short sedentary time group ( HR=0.72, 95% CI: 0.60-0.87). These associations remained when the cases diagnosed with COPD within one year of the baseline survey were excluded. Conclusions:Increasing physical activity and reducing sedentary time have beneficial effects to prevent COPD in non-smoking women, and reducing sedentary time alone may also reduce the risk for COPD if increasing physical exercise or other physical activity is not possible.

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