1.Expert Consensus on Neurocritical Care Monitoring and Management in Beijing and Tibet(2025)
Drolma PHURBU ; Wenjin CHEN ; Heng ZHANG ; Jian ZHANG ; Xiaomeng WANG ; Guoying LIN ; Wenjun PAN ; Xiying GUI ; Xin CAI ; Chodron TENZIN ; Jianlei FU ; Qianwei LI ; TSEYANG ; Yijun LIU ; Bo LIU ; Tsering DROLMA ; Yudron SONAM ; KYILV ; Samdrup TSERING ; Wa DA ; Juan GUO ; Cheng QIU ; Huan CHEN ; Xiaoting WANG ; Yangong CHAO ; Dawei LIU ; Wenzhao CHAI ; Chenggong HU ; Wanhong YIN ; Shihong ZHU
Medical Journal of Peking Union Medical College Hospital 2026;17(1):59-72
Neurocritical care involves complex pathophysiological mechanisms, and its incidence is higher, injuries are more severe, and treatment is more challenging in high-altitude environments. This consensus, based on the latest domestic and international evidence-based medical data, establishes a standardized, goal-oriented framework for neurocritical care management applicable in high-altitude regions and nationwide. The consensus was developed following international standards for evidence quality assessment and underwent two rounds of Delphi expert consultation, resulting in 32 recommendation statements covering three parts: management systems, monitoring and assessment, and core strategies. Key updates include: advocating for the establishment of independent neurocritical care units and implementing precise tiered diagnosis and treatment based on the "Five Differences in Critical Care" concept; constructing a "trinity" multimodal brain monitoring system centered on cerebral blood flow, cerebral oxygenation, and brain function, emphasizing routine bedside transcranial Doppler ultrasound, cerebral oximetry, and continuous electroencephalography monitoring; shifting management strategies from mild hypothermia therapy to targeted temperature management, and defining the "446" target management pathway for the supercritical stage; emphasizing the assessment of static and dynamic cerebrovascular autoregulation functions through multimodal methods to achieve individualized optimal mean arterial pressure management; elevating cerebrospinal fluid management goals to the level of "glymphatic system" function maintenance; implementing a multidisciplinary collaborative, whole-process management model focusing on patients' long-term neurological functional outcomes; de-escalation criteria include multidimensional indicators such as recovery of brain structure, restoration of cerebrovascular autoregulation, improvement in cerebrospinal fluid dynamics, and reduction in biomarker levels; and integrating cutting-edge technologies like artificial intelligence into post-critical care management and rehabilitation planning. This consensus systematically integrates the entire process of neurocritical care management, reflecting the modern connotation of goal-oriented, dynamic, and multimodal integration in neurocritical care medicine. It aims to adapt to new trends such as deepening understanding of pathophysiological mechanisms, the integration of medicine and engineering, and the empowerment of artificial intelligence, thereby further advancing the discipline of critical care medicine.
2.Accuracy of multivariate discriminant analysis versus fibrosis-4 in evaluating the liver fibrosis degree in patients with chronic HBV infection
Hongyu LIU ; Xiaoting LI ; Jianning JIANG ; Chao JIN ; Cailian CAI ; Keshan WANG ; Fangpeng LING ; Bingling FAN ; Minghua SU
Journal of Clinical Hepatology 2025;41(4):677-683
ObjectiveTo investigate the accuracy of multiple discriminant analysis (MDA) versus fibrosis-4 (FIB-4) in assessing liver fibrosis degree in patients with HBV infection, as well as the possibility of MDA as an indicator for disease progression. MethodsA total of 263 patients with HBV infection who underwent liver biopsy in The First Affiliated Hospital of Guangxi Medical University from April 2010 to April 2024 were included, and their clinical data were collected. According to the results of pathological examination, they were divided into non-significant fibrosis group (F<2) with 126 patients and significant fibrosis group (F≥2) with 137 patients. The correlation of MDA and FIB-4 with liver fibrosis degree was analyzed, and MDA and FIB-4 were compared in terms of their accuracy in assessing significant liver fibrosis. A total of 62 patients completed follow-up, and according to the presence or absence of progression to liver cirrhosis at the last follow-up visit, they were divided into progressive group with 21 patients and non-progressive group with 41 patients; the efficacy of MDA and FIB-4 in diagnosing disease progression was analyzed and compared. The independent-samples t test was used for comparison of normally distributed continuous data between groups, and the Mann-Whitney U test was used for comparison of non-normally distributed continuous data between groups; the Kruskal-Wallis H test was used for comparison between multiple groups, and the Bonferroni method was used for further comparison between two groups. The chi-square test was used for comparison of categorical data. The Spearman’s correlation coefficient was used for correlation analysis. The Wilcoxon signed rank sum test was used for the analysis of baseline data and data at the end of follow-up, and the binary Logistic regression analysis was used to investigate the influencing factors for progression to liver cirrhosis. The receiver operating characteristic (ROC) curve was used to investigate the diagnostic efficacy of indicators, the Z-test was used for comparison of the area under the ROC curve (AUC), and the paired chi-square test was used for comparison of the sensitivity, specificity, and accuracy of the two indicators. ResultsThe correlation coefficient between FIB-4 and liver fibrosis degree was 0.378, while the correlation coefficient between MDA and liver fibrosis degree was -0.325 (both P<0.001). FIB-4 had an AUC of 0.688, a sensitivity of 64.96%, a specificity of 68.87%, a positive predictive value of 67.42%, a negative predictive value of 63.36%, an accuracy of 65.40%, and a cut-off value of 1.01, while MDA had an AUC of 0.653, a sensitivity of 52.55%, a specificity of 78.57%, a positive predictive value of 72.73%, a negative predictive value of 60.37%, an accuracy of 65.02%, and a cut-off value of 0.29, suggesting that compared with FIB-4, MDA had a lower sensitivity (P=0.004) and a higher specificity (P=0.001). The progressive group had a significantly higher age than the non-progressive group at baseline (t=2.611, P=0.011). For the progressive group, there was an increase in FIB-4 and a reduction in MDA from baseline to the end of follow-up (both P<0.001), while the non-progressive group showed no significant changes (both P>0.05). The multivariate Logistic regression analysis showed that aspartate aminotransferase (odds ratio [OR]=0.940, 95% confidence interval [CI]: 0.885 — 0.998, P<0.05) and MDA (OR=0.445, 95%CI: 0.279 — 0.710, P<0.001) were independent influencing factors for disease progression. MDA had an AUC of 0.893 and an optimal cut-off value of -0.01 in diagnosing the disease progression of liver cirrhosis. ConclusionMDA has a comparable accuracy to FIB-4 in the diagnosis of significant liver fibrosis, and MDA<-0.01 has a high accuracy in diagnosing the progression of liver fibrosis to liver cirrhosis, which can help to reduce the need for liver biopsy in clinical practice.
3.Effect of surface treatment on dentin rebonding after laser non-destructive removal of zirconia prosthesis
LI Xiaoting ; JIANG Lei ; LU Zhicen ; CAI Chunyan ; YU Hao
Journal of Prevention and Treatment for Stomatological Diseases 2025;33(3):195-202
Objective:
To investigate the changes of dentin surface and the effects of different surface treatments on the rebonding effect following non-destructive restoration removal by an Er:YAG laser and to provide reference for oral clinical operation
Methods:
This study was approved by the ethics review committee of the unit. Using computer-aided design and computer-aided manufacturing (CAD/CAM) technology, 102 zirconia specimens (4 mm × 4 mm × 1.5 mm) were fabricated. In total, 110 impacted third molar teeth were extracted, and 102 dentine blocks (4 mm × 4 mm × 2 mm) were prepared. The zirconia specimen and dentin blocks were bonded with resin cement before removal with an Er: YAG laser. Three disassembled dentin blocks were randomly selected, and the components of dentin surface elements were analyzed by energy dispersive X-ray spectroscopy (EDX). The removed dentin blocks were randomly divided into three groups (n = 33) based on the different surface treatments: control group (no treatment), sandblasting group (50 μm, Al2O3 sandblasting), and laser irradiation group (Er: YAG laser irradiation, parameters were set to 10 Hz, 60 mJ, 0.6 W). Three dentin blocks were randomly selected in each group for scanning electron microscopy (SEM) observation, and the residual resin on dentin surface of remaining 30 dentin blocks in each group were observed under an optical microscope at 20 times magnification. Scores were obtained using the adhesive remnant index (ARI) method. Three groups of dentin blocks (n = 30) that underwent different surface treatments were rebonded with resin cement according to standard procedures and then divided into two subgroups for aging (n = 15). One subgroup was subjected to a 37 ℃ water bath for 24 h, and the other subgroup was subjected to 5 000 thermal cycles after a 37 ℃ water bath for 24 h, and the micro-shear bonding strength of each group was measured. The microshear bonding strength of each group was measured, and fracture modes were analyzed. The differences of dentine surface ARI between the three groups, as well as the inter-group differences in fracture mode, and bonding strength, and the intra-group differences before and after aging were compared between the three groups.
Results:
When zirconia was removed by Er: YAG laser, there was no obvious damage on the dentin surface, but C and Si elements in dentin increased significantly. After different surface treatments, the ARI scores of the sandblasting and laser irradiation groups were lower than those of the control group (P<0.05), while ARI was not significantly different between the sandblasting and laser irradiation groups (P>0.05). The dentin surface morphology was also different. There was a large amount of residual resin on the dentin surface of the control group. In the sandblasting group, the residual resin was lower, the dentin surface was rough, and the dentin tubules were visible. A large amount of residual resin was observed on the dentin surface of the laser irradiation group. After 24 h of water bath at 37 ℃, the bonding strengths of the control group, sandblasting group, and laser irradiation group were (6.13 ± 2.40) MPa, (9.39 ± 2.00) MPa, and (5.85 ± 1.44) MPa, respectively, and the bonding strength of the sandblasting group was significantly higher than that of the other two groups (P<0.05). After being subjected to 24 h of water bath at 37 ℃ and 5 000 thermal cycles, the bonding strengths of the control group, sandblasting group, and laser irradiation group were (5.39 ± 0.83) MPa, (8.45 ± 1.20) MPa and (4.84 ± 1.43) MPa, respectively. The bonding strength of the sandblasting group was significantly higher than that of the other two groups (P<0.05). There was no significant difference between the control group, sandblasting group, and laser irradiation group before and after 5 000 thermal cycles following 24 h of water bath at 37 ℃ (P>0.05). In the control group, sandblasting group, and laser irradiation group, cohesive fracture was not observed. The fracture mode was mainly adhesive fracture. Before and after 5 000 thermal cycles, the frequency of mixed fracture in the sandblasting group was significantly higher than that in the other two groups (P<0.05).
Conclusion
Er: YAG laser removal of zirconia does not damage dentin, but a large amount of resin remains on the dentin surface after removal. The sandblasting process can effectively remove these residual resins, thereby improving the dentine rebonding effect.
4.Evolution and development of mental health policies for children and adolescents in China
Chinese Journal of School Health 2025;46(9):1246-1251
Objective:
To systematically review the development and changes in mental health policies within the National Outline for Children s Development in China from 1992 to 2030, providing a reference basis for future formulation of mental health policies among children and adolescent in China.
Methods:
Based on the four editions of the National Outline for Children s Development in China across different periods from 1992 to 2030, word frequency analysis was used to reveal shifts in policy priorities, and an internationally recognized framework for adolescent health policy analysis was applied to conduct a textual review.
Results:
Word frequency analysis revealed that the term "psychological" appeared 6 times in the National Outline for Children s Development in China (2001-2010) but increased to 20 times in the National Outline for Children s Development in China (2021-2030) (abbreviated as the National Outline of 2021), while the term "health" rose from 4 times in the National Outline for Children s Development Plan in China in the 1990s to 68 times in the National Outline of 2021. The scope of mental health policy interventions expanded to encompass five key areas:health, safety, education, welfare and legal protection. Textual analysis highlighted that the policies of the National Outline for Children s Development in China were demand driven, prioritized vulnerable groups and continuously broadened their coverage, emphasizing sustainability and appropriateness, and monitoring/evaluation mechanisms. By 2023, 42.3% of primary schools and 64.8% of secondary schools employed full time mental health education teachers. However, the National Outline for Children s Development in China lacked direct evidence of children and adolescents participation in policy formulation, and publicly available mental health data disaggregated by age and gender remained limited.
Conclusion
Mental health policies of children and adolescents in China have evolved from nonexistence to gradual refinement, yet institutionalized channels for youth involvement in policy development and evaluation remain insufficient, and transparency in age and gender specific mental health data needs improvement.
5.Progress in the application of drug-induced sleep endoscopy in pediatric OSA.
Shuyao QIU ; Xiaoting CAI ; Jianwen ZHONG ; Dabo LIU
Journal of Clinical Otorhinolaryngology Head and Neck Surgery 2025;39(2):181-184
Drug-induced sleep endoscopy (DISE) is an endoscopic examination performed under conditions similar to human physiological sleep induced by drugs. In recent years, its clinical application has become increasingly widespread. This article reviews the research progress on the indications, anesthesia, and outcome determination of pediatric DISE, providing a basis for the application of pediatric DISE.
Humans
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Child
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Sleep Apnea, Obstructive/diagnosis*
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Endoscopy/methods*
;
Sleep
6.Lentivirus-modified hematopoietic stem cell gene therapy for advanced symptomatic juvenile metachromatic leukodystrophy: a long-term follow-up pilot study.
Zhao ZHANG ; Hua JIANG ; Li HUANG ; Sixi LIU ; Xiaoya ZHOU ; Yun CAI ; Ming LI ; Fei GAO ; Xiaoting LIANG ; Kam-Sze TSANG ; Guangfu CHEN ; Chui-Yan MA ; Yuet-Hung CHAI ; Hongsheng LIU ; Chen YANG ; Mo YANG ; Xiaoling ZHANG ; Shuo HAN ; Xin DU ; Ling CHEN ; Wuh-Liang HWU ; Jiacai ZHUO ; Qizhou LIAN
Protein & Cell 2025;16(1):16-27
Metachromatic leukodystrophy (MLD) is an inherited disease caused by a deficiency of the enzyme arylsulfatase A (ARSA). Lentivirus-modified autologous hematopoietic stem cell gene therapy (HSCGT) has recently been approved for clinical use in pre and early symptomatic children with MLD to increase ARSA activity. Unfortunately, this advanced therapy is not available for most patients with MLD who have progressed to more advanced symptomatic stages at diagnosis. Patients with late-onset juvenile MLD typically present with a slower neurological progression of symptoms and represent a significant burden to the economy and healthcare system, whereas those with early onset infantile MLD die within a few years of symptom onset. We conducted a pilot study to determine the safety and benefit of HSCGT in patients with postsymptomatic juvenile MLD and report preliminary results. The safety profile of HSCGT was favorable in this long-term follow-up over 9 years. The most common adverse events (AEs) within 2 months of HSCGT were related to busulfan conditioning, and all AEs resolved. No HSCGT-related AEs and no evidence of distorted hematopoietic differentiation during long-term follow-up for up to 9.6 years. Importantly, to date, patients have maintained remarkably improved ARSA activity with a stable disease state, including increased Functional Independence Measure (FIM) score and decreased magnetic resonance imaging (MRI) lesion score. This long-term follow-up pilot study suggests that HSCGT is safe and provides clinical benefit to patients with postsymptomatic juvenile MLD.
Humans
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Leukodystrophy, Metachromatic/genetics*
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Pilot Projects
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Genetic Therapy/methods*
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Hematopoietic Stem Cell Transplantation
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Male
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Follow-Up Studies
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Female
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Lentivirus/genetics*
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Child
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Child, Preschool
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Hematopoietic Stem Cells/metabolism*
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Cerebroside-Sulfatase/metabolism*
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Adolescent
7.Effectiveness of fibrosis-4 versus aspartate aminotransferase-to-platelet ratio index in evaluating liver fibrosis degree in patients with chronic HBV infection
Xiaoting LI ; Bobin HU ; Hongyu LIU ; Chao JIN ; Cailian CAI ; Keshan WANG ; Yanchun WEI ; Jianning JIANG ; Minghua SU
Journal of Clinical Hepatology 2024;40(12):2424-2429
ObjectiveTo investigate the performance of fibrosis-4 (FIB-4) versus aspartate aminotransferase-to-platelet ratio index (APRI) in predicting advanced liver fibrosis and disease progression in patients with chronic HBV infection. MethodsA total of 497 patients with chronic HBV infection who underwent liver biopsy in The First Affiliated Hospital of Guangxi Medical University from February 2013 to December 2022 were enrolled, among whom 404 were enrolled in a retrospective study and 75 were enrolled in a prospective study. Related indicators were collected, including demographic features (sex and age), biochemical indices (alanine aminotransferase [ALT] and aspartate aminotransferase [AST]), and platelet count, and FIB-4 and APRI were calculated. The Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups, and the Kruskal-Wallis H test was used for comparison between multiple groups; the chi-square test was used for comparison of categorical data between groups. The area under the ROC curve (AUC) was used to assess the ability of APRI and FIB-4 in evaluating liver fibrosis degree and disease progression in patients with chronic HBV infection. ResultsIn the retrospective analysis, compared with the FIB-4<2.67 group, the FIB-4≥2.67 group had a significantly higher proportion of the patients who were diagnosed with liver cirrhosis or hepatocellular carcinoma (66.19% vs 47.54%, χ²=12.75, P<0.001). The medians of FIB-4 and APRI increased significantly with liver fibrosis degree from F0 to F4 (H=42.5 and 35.9, both P<0.001). As for the fibrosis stage of F0-F4, the median of FIB-4 was significantly higher than that of APRI in the patients with the same fibrosis stage (H=59.71, P<0.001). FIB-4 and APRI had a similar AUC for predicting stage F3 fibrosis (0.67 vs 0.65, Z=0.71, P=0.480), while FIB-4 had a higher AUC for predicting stage F4 fibrosis than APRI (0.72 vs 0.64, Z=10.50, P<0.001). In the prospective study cohort, FIB-4 and APRI showed an increasing trend over time in predicting disease progression (chronic hepatitis B to liver cirrhosis), with an AUC of 0.718 (95% confidence interval [CI]: 0.476 — 0.760) and 0.555 (95%CI: 0.408 — 0.703), respectively, and FIB-4 had a significantly higher accuracy than APRI in predicting disease progression (χ2=12.44, P<0.001). ConclusionFIB-4 and APRI can be used to evaluate advanced liver fibrosis (F3 and F4) and predict disease progression, and FIB-4 is superior to APRI in certain aspects.
8.Effects of anal fistula incision, muscle layer suture and internal drainage surgery on wound recovery, anal function and anal high pressure zone length in patients with low anal fistula
Xiaojun LIU ; Xiaoting ZHANG ; Lidan CAI ; Chao CHEN
Chinese Journal of Postgraduates of Medicine 2024;47(7):595-599
Objective:To observe the clinical effect of anal fistula incision, muscle layer suture, and internal drainage surgery in the treatment of low anal fistula.Methods:A retrospective study was conducted on 65 patients with low anal fistula admitted to Fifth Hospital of Zhangjiakou City From March 2021 to March 2023, and they were divided into two groups based on different surgical methods. The control group consisted of 32 patients who underwent traditional anal fistula incision and thread drainage, while the study group consisted of 33 patients who underwent anal fistula incision and muscle layer suture internal drainage. The duration of surgery, wound recovery, anal function, anal motility, degree of pain, and recurrence rate were compared.Results:The surgical time of the study group was longer than that of the control group: (34.86 ± 4.17) min vs. (25.21 ± 3.95) min ( P<0.05), the wound healing time was shorter than that of the control group: (15.72 ± 3.26) d vs. (18.94 ± 4.42) d ( P<0.05), and the wound area was smaller than that of the control group: (5.76 ± 1.72) cm 2 vs. (7.78 ± 1.89) cm 2 ( P<0.05). At 4 weeks after surgery, the Wexner scores in both groups were lower than those at 1 d after surgery ( P<0.05), and the study group was lower than the control group: (3.39 ± 1.08) scores vs. (4.15 ± 1.21) scores ( P<0.05). After surgery, the high pressure zone length, anal rest pressure and anal maximum contraction pressure in the control group were lower than before surgery ( P<0.05), and the study group were higher than the control group: (4.92 ± 1.11) cm vs. (3.64 ± 1.02) cm, (11.93 ± 1.22) kPa vs. (9.45 ± 1.08) kPa, (13.34 ± 3.42) kPa vs. (10.82 ± 2.75) kPa ( P<0.05). At 48 h after surgery, the visual analogue scale (VAS) scores of both groups were lower than those at 12 h after surgery ( P<0.05), and the study group was lower than the control group: (1.63 ± 0.21) scores vs. (2.25 ± 0.34) scores ( P<0.05). After 6 months of follow-up, neither group experienced any recurrence. Conclusions:Anal fistula incision, muscle layer suture and internal drainage surgery for low anal fistula can shorten the wound healing time, reduce the wound area, improve anal function and anal motility, alleviate pain, and avoid recurrence. However, the surgical time is longer.
9.Efficacy of Xihuang capsules as an adjuvant treatment for metastatic colorectal cancer and its impact on immune function.
Zhenhong WENG ; Wei LUO ; Lilin LI ; Qinghao KONG ; Jianhua LUO ; Yingbin XIE ; Kangyu CAI ; Xiaoting CHEN
Chinese Journal of Cellular and Molecular Immunology 2024;40(11):1005-1010
Objective To investigate the efficacy and safety of Xihuang capsules as an adjuvant treatment for metastatic colorectal cancer and their impact on immune function. Methods A retrospective analysis was conducted on clinical data from 112 patients diagnosed with metastatic colorectal cancer. The patients were categorized into two groups: a control group (n=56) that did not take Xihuang capsules and an observation group (n=56) that did. The efficacy, improvement of quality of life, toxic and side effects and immune function of the two groups were analyzed and compared. Results After treatment, the disease control rate (DCR) and the rate of improvement in quality of life were significantly higher in the observation group compared to the control group. Additionally, levels of carcinoembryonic antigen (CEA) and the incidence of adverse reactions, including bone marrow suppression and liver and kidney function damage, were significantly lower in the observation group. Furthermore, the percentages of CD4+ and CD8+ T cells, the CD8+/CD4+ T cells ratio, as well as serum levels of high mobility group box-1 (HMGB1) and interleukin 2 (IL-2) in observation group were significantly elevated compared to pre-treatment levels. Subgroup analysis revealed that patients with a Karnofsky Performance Status (KPS) score ≤80, a high CD8+/CD4+ T cells ratio, and elevated HMGB1 levels experienced a significantly higher objective response rate (ORR) in the observation group. Conversely, patients with stage IVB disease, who had KPS score ≤80, a low CD8+/CD4+ T cells ratio and high CEA and IL-2 levels demonstrated a more pronounced DCR in the observation group. Conclusion Xihuang capsules exhibit promising clinical efficacy as an adjuvant treatment for advanced colorectal cancer. They not only enhance patients' quality of life and reduce the toxic and adverse effects of chemotherapy, but also improve immune function. These benefits are particularly significant in patients with a high tumor burden, indicating that Xihuang capsules are worthy of clinical application.
Humans
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Colorectal Neoplasms/immunology*
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Male
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Female
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Middle Aged
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Drugs, Chinese Herbal/adverse effects*
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Capsules
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Aged
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Carcinoembryonic Antigen/blood*
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Retrospective Studies
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Quality of Life
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Adult
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Neoplasm Metastasis
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Interleukin-2/blood*
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HMGB1 Protein/blood*
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Chemotherapy, Adjuvant
10.Cluster analysis of sexualized drug use among men who have sex with men and its impact on high risk sexual behaviors in Chengdu
Xiaoting CHEN ; Yuqi CAI ; Lanxia GAN ; Fengsu HOU ; Xiao YANG ; Xiaodong WANG ; Chun HAO ; Jing GU ; Yuantao HAO ; Wangnan CAO ; Jinghua LI
Chinese Journal of Epidemiology 2023;44(2):268-275
Objective:To understand the characteristics of sexualized drug use (SDU) among men who have sex with men (MSM) in Chengdu and classify their behavioral patterns by applying the two-step cluster (TSC) algorithm and by exploring the association between SDU patterns and high risk sexual behaviors, in order to provide a reference basis for the development of HIV prevention interventions.Methods:Supported by an MSM-friendly organization in Chengdu from December 2021 to February 2022, MSM were recruited by on-site survey and peer referral to collect information on sociodemographics, SDU characteristics, sexual behaviors, STD diagnosis, and HIV status. TSC was performed to classify the characteristics of SDU, and the differences between groups were compared. Chi-square test and multiple binary logistic regressions were used to identify the relationship between SDU clusters and HIV-related risk sexual behaviors.Results:A total of 727 MSM were surveyed, and 39.8% (289/727) of the respondents reported SDU experience with a same-sex partner in the last six months. TSC clustered SDU-MSM into three behavioral pattern groups. There were significant differences in monthly income, types of drugs used for SDU, mode, frequency, polydrug use, multiple sexual partners, non-adherence to condom use, and group sex among the three groups of SDU-MSM ( P<0.05). Multivariate binary logistic regression analysis showed that the third category of SDU-MSM was 2.22 (95% CI: 1.06-4.66) times more likely than the first category not to use condoms consistently; the third and second categories were 2.82 (95% CI: 1.18-6.77) times and 8.78 (95% CI: 3.42-22.42) times. Conclusions:The prevalence of SDU among MSM in Chengdu was more than 1/3, and different SDU clustering pattern was associated with high-risk sexual behaviors. MSM with higher SDU frequency, drug use, and polydrug abuse are more difficult to adhere to condom use and more likely to have group sex and high risk sexual behaviors, increasing the risk of STD and HIV infection, and need to strengthen SDU surveillance and intervention.


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