Objective:To understand the prevalence of psychoactive substance use and related factors in men who have unprotected sex with men in Zhejiang Province.Methods:Men who have unprotected sex with men were recruited by snowball sampling through men who have sex with men (MSM) social organization in Zhejiang to conduct a cross-sectional investigation from January 2022 to December 2023. The sample size was estimated to be 1 169 individuals. The information about their socio-demographic information, sexual behaviors, psychoactive substance use, and HIV testing were collected through on-site questionnaire survey. Logistic regression analysis model was used to analyze related factors about psychoactive substance use in this population.Results:A total of 1 914 men who have unprotected sex with men were included in the study, the average age of the study subjects was (31.43±10.46) years, and most of them were aged ≤35 years (70.8%, 1 356/1 914). Those with education level of high school or below accounted for 50.1% (960/1 914) and those who were not married accounted for 63.5% (1 216/1 914). Psychoactive substance use in the past 3 months was reported in 19.7% (377/1 914) of the subjects. Multivariate logistic regression analysis showed that the factors associated with psychoactive substance use in the past 3 months included age 26-35 years (a OR=1.65, 95% CI: 1.24-2.19), ≥2 sexual partners in the past 3 months (a OR=2.33, 95% CI: 1.82-2.97), STD diagnosed in the past 3 months (a OR=2.62, 95% CI: 1.45-4.74), and awareness of the HIV infection status of sexual partners (a OR=2.83, 95% CI: 2.12-3.78). Conclusions:The prevalence of psychoactive substance use in men who have unprotected sex with men was high in Zhejiang. It is necessary to strengthen the intervention in this population.

Objective:To understand the prevalence of psychoactive substance use and related factors in men who have unprotected sex with men in Zhejiang Province.Methods:Men who have unprotected sex with men were recruited by snowball sampling through men who have sex with men (MSM) social organization in Zhejiang to conduct a cross-sectional investigation from January 2022 to December 2023. The sample size was estimated to be 1 169 individuals. The information about their socio-demographic information, sexual behaviors, psychoactive substance use, and HIV testing were collected through on-site questionnaire survey. Logistic regression analysis model was used to analyze related factors about psychoactive substance use in this population.Results:A total of 1 914 men who have unprotected sex with men were included in the study, the average age of the study subjects was (31.43±10.46) years, and most of them were aged ≤35 years (70.8%, 1 356/1 914). Those with education level of high school or below accounted for 50.1% (960/1 914) and those who were not married accounted for 63.5% (1 216/1 914). Psychoactive substance use in the past 3 months was reported in 19.7% (377/1 914) of the subjects. Multivariate logistic regression analysis showed that the factors associated with psychoactive substance use in the past 3 months included age 26-35 years (a OR=1.65, 95% CI: 1.24-2.19), ≥2 sexual partners in the past 3 months (a OR=2.33, 95% CI: 1.82-2.97), STD diagnosed in the past 3 months (a OR=2.62, 95% CI: 1.45-4.74), and awareness of the HIV infection status of sexual partners (a OR=2.83, 95% CI: 2.12-3.78). Conclusions:The prevalence of psychoactive substance use in men who have unprotected sex with men was high in Zhejiang. It is necessary to strengthen the intervention in this population.

Objective: To investigate the characteristics of AHFtest-based HIV antibody self-testing among male adolescents at ages of 15 to 24 years, so as to provide insights into the promotion of HIV antibody self-testing. Methods: Data were collected from male adolescents at ages of 15 to 24 years that applied for HIV antibody self-testing in the AHFtest platform from 2019 to 2021, with mailing address showing as Zhejiang Province, and demographics, applying cause and testing results were analyzed. Results: A total of 268 male adolescents were enrolled, with a median age of 22.00 (interquartile range, 3.00) years. There were 160 cases with an educational level of junior college/bachelor (59.70%), 147 students (54.85%), 175 men who had sex with men (65.30%), and 126 cases with a history of previous HIV antibody self-testing (47.01%). The main causes for applying for HIV antibody self-testing through AHFtest were "easy to operate" (259 cases, 96.64%) and "privacy protect" (102 cases, 38.06%). There were 203 subjects that applied once HIV antibody self-testing (75.75%), and 65 subjects that applied multiple self-testing (24.25%). There were 123 subjects that uploaded their test results (45.90%), including 3 cases with HIV antibody positive, and 125 subjects that did not tell others the self-testing results (46.64%). Conclusions Among male applicants at ages of 15 to 24 years in Zhejiang Province from 2019 to 2021, students are predominant occupation. Easy to operate and privacy protect are the main cause for the application, but the proportion of detection results uploading is relatively low.

Objective:To evaluate the efficacy and safety of transcatheter arterial chemoembolization (TACE) combined with tislelizumab and tyrosine kinase inhibitor (TKI) as a conversion therapy in patients with initially unresectable hepatocellular carcinoma (HCC).Methods:The clinical data of 51 initially unresectable HCC patients admitted to the Department of Hepato-Pancreato-Biliary Surgery, the Eighth Affiliated Hospital of Guangxi Medical University from March 2022 to November 2023 were prospectively collected, including 46 males and 5 females, aged (53±11) years old. All patients received TACE combined with tislelizumab and TKI. For initially unresectable HCC patients who have successfully undergone conversion therapy, surgical resection was performed sequentially. Follow-up was conducted through regular outpatient visits or hospitalization combined with telephone contact, and the surgical conversion, relapse-free survival and adverse reactions of patients were recorded.Results:Among the 51 patients with initial unresectable HCC, there were 12 cases of stage Ib, 14 cases of stage IIa, 10 cases of stage IIb, and 15 cases of stage IIIa in Chinese liver cancer staging. The 51 patients were evaluated according to the modified solid tumor response evaluation criteria, and 15 patients had complete response, 26 had partial response, 5 had stable disease, and 5 had disease progression. The objective response rate was 80.4% (41/51), and the disease control rate was 90.2% (46/51). The conversion success rate was 49.0% (25/51), 2 patients gave up surgery, and the actual conversion rate was 45.1% (23/51). Among the 23 patients who underwent surgical resection, irregular hepatectomy was performed in 11 cases, lobectomy in 8 cases, and hemihepatectomy in 4 cases. Common treatment-related adverse events were hand-foot syndrome, hypertension, gingival bleeding, etc. Most of the drug-related adverse events were grade 1 to grade 2. A total of 10 patients (19.6%, 10/51) had grade 3 drug-related adverse events, and no grade 4 or above adverse events occurred, and no treatment-related deaths occurred. The cumulative recurrence free survival rates of 23 patients with initial unresectable HCC at 6 and 12 months after sequential hepatectomy were 100% and 94.7% respectively.Conclusion:The triple combination therapy of TACE combined with tislelizumab and TKI in the treatment of initial unresectable HCC has good clinical efficacy, and the adverse reactions are safe and controllable.

Objective:To understand the source and related factors among heterosexual casual partners among male college students for providing AIDS prevention strategies in this population.Methods:Stratified cluster sampling method was used to conduct a questionnaire survey among 31 674 college students in 13 colleges in Zhejiang Province, from October to November, 2018. A total of 2 665 male college students who reported having had heterosexual casual behavior and the source of their sexual partners were recruited. Data on demographic characteristics, knowledge of HIV/AIDS prevention, sexual behavior, and having received AIDS-related interventions were collected. The multivariable logistics regression model was used to analyze the related factors of the source of casual heterosexual behavior partners among male college students.Results:A total of 423 male college students having casual heterosexual sex were investigated, accounting for 15.9% (423/2 665) of the male college students who self-reported having sexual behaviors and informed their sexual partners. Among them, 39.4% (147/373), 37.5% (140/373), and 23.1% (86/373) of participants had 1, 2-4, and 5 or more heterosexual casual sexual partners, respectively. 40.1% (167/416) of participants used condoms consistently with casual partners. 143 (33.8%) participants with social individual's partners were an average age of (20.27±1.40) years old. Multivariate logistic regression analysis showed that: when compared with one person, common acquaintances, and no heterosexual casual partners in the previous year, the factors that related to the source of heterosexual casual partners of male college students appeared as follows: the number of heterosexual casual sexual partners ≥5 (a OR=3.00, 95% CI:1.53-5.89), seeking the casual sexual partners through entertainment venues (a OR=3.04,95% CI:1.64-5.64), male college students having sex with a regular partner in the last one year (a OR=0.41, 95% CI:0.25-0.68). Conclusions:Some of the male college students had heterosexual casual sexual behaviors, with the related factors as having five or more heterosexual casual sexual partners, seeking casual sex partners through entertainment venues, and low condom use. Self-protection awareness and ability should be emphasized to advocate safe sex to reduce the risk of AIDS transmission among college students.

Objective To investigate the clinical features,CT imaging features of benign and ma-lignant pulmonary nodules,as well as the indicators for diagnosing the infiltration degree of malignant ground-glass nodules(GGN).Methods A total of 205 patients with pulmonary nodules who under-went thoracoscopic surgery were selected as research subjects.According to the postoperative patholog-ical results,they were divided into benign nodule group and malignant nodule group.The clinical fea-tures and imaging features of the two groups were analyzed.Based on the postoperative pathological re-sults(infiltration degree),the patients with malignant GGN were further divided into preinvasive le-sion(PL)group,minimally invasive adenocarcinoma(MIA)group,and invasive adenocarcinoma(IAC)group.Quantitative and qualitative analyses were conducted to screen for independent influen-cing factors of malignant GGN infiltration degree and evaluate their diagnostic value.Results There were significant differences in nodule location,nodule type,pleural indentation sign,and vascular clustering sign between the benign nodule group and the malignant nodule group(P＜0.05).Multiva-riate Logistic regression analysis showed that nodule type,pleural indentation sign,and vascular clus-tering sign were independent influencing factors of benign and malignant pulmonary nodules(P＜0.05).There were significant differences in age,vascular clustering sign,nodule length,average CT value,and nodule type between the PL group and the MIA group(P＜0.05);there were significant differ-ences in nodule length,average CT value,solid component length,vascular clustering sign,and pleural indentation sign between the MIA group and the IAC group(P＜0.05).Multivariate Logis-tic regression analysis showed that nodule length and average CT value were independent influencing factors of malignant GGN infiltration degree(P＜0.05).The receiver operating characteristic curve analysis showed that the area under the curve(AUC)of nodule length and average CT value for dif-ferential diagnosis of PL and MIA were 0.805 and 0.857,respectively,with cutoff values of 7.2 mm and-612.3 HU,respectively.The AUC of their combined diagnosis was 0.923;the AUC of nod-ule length and average CT value for differential diagnosis of MIA and IAC were 0.860 and 0.703,respectively,with cutoff values of 16.2 mm and-338.1 HU,respectively.The AUC of their com-bined diagnosis was 0.893.Conclusion For GGN,especially those with pleural indentation sign and vascular clustering sign,a high suspicion of malignant pulmonary nodules should be raised.The length and average CT value of pulmonary nodules have certain diagnostic value for the infiltration degree of malignant GGN,and their combined application has higher diagnostic value.

Objective To investigate the clinical features,CT imaging features of benign and ma-lignant pulmonary nodules,as well as the indicators for diagnosing the infiltration degree of malignant ground-glass nodules(GGN).Methods A total of 205 patients with pulmonary nodules who under-went thoracoscopic surgery were selected as research subjects.According to the postoperative patholog-ical results,they were divided into benign nodule group and malignant nodule group.The clinical fea-tures and imaging features of the two groups were analyzed.Based on the postoperative pathological re-sults(infiltration degree),the patients with malignant GGN were further divided into preinvasive le-sion(PL)group,minimally invasive adenocarcinoma(MIA)group,and invasive adenocarcinoma(IAC)group.Quantitative and qualitative analyses were conducted to screen for independent influen-cing factors of malignant GGN infiltration degree and evaluate their diagnostic value.Results There were significant differences in nodule location,nodule type,pleural indentation sign,and vascular clustering sign between the benign nodule group and the malignant nodule group(P＜0.05).Multiva-riate Logistic regression analysis showed that nodule type,pleural indentation sign,and vascular clus-tering sign were independent influencing factors of benign and malignant pulmonary nodules(P＜0.05).There were significant differences in age,vascular clustering sign,nodule length,average CT value,and nodule type between the PL group and the MIA group(P＜0.05);there were significant differ-ences in nodule length,average CT value,solid component length,vascular clustering sign,and pleural indentation sign between the MIA group and the IAC group(P＜0.05).Multivariate Logis-tic regression analysis showed that nodule length and average CT value were independent influencing factors of malignant GGN infiltration degree(P＜0.05).The receiver operating characteristic curve analysis showed that the area under the curve(AUC)of nodule length and average CT value for dif-ferential diagnosis of PL and MIA were 0.805 and 0.857,respectively,with cutoff values of 7.2 mm and-612.3 HU,respectively.The AUC of their combined diagnosis was 0.923;the AUC of nod-ule length and average CT value for differential diagnosis of MIA and IAC were 0.860 and 0.703,respectively,with cutoff values of 16.2 mm and-338.1 HU,respectively.The AUC of their com-bined diagnosis was 0.893.Conclusion For GGN,especially those with pleural indentation sign and vascular clustering sign,a high suspicion of malignant pulmonary nodules should be raised.The length and average CT value of pulmonary nodules have certain diagnostic value for the infiltration degree of malignant GGN,and their combined application has higher diagnostic value.

Objective: To investigate the factors affecting HIV testing among male college students with sexual behaviors, so as to provide the evidence for improving the detection of HIV testing among young college students. Methods: Four undergraduate universities and one junior college were randomly sampled from Hangzhou City using a purposive sampling method during the period between September and November, 2021, and male students with self-reported sexual behaviors were recruited as study students. Participants' demographics, AIDS-related knowledge, sexual behaviors and HIV testing were collected using questionnaires, and factors affecting HIV testing using a multivariable logistic regression model. Results: A total of 720 male college students with sexual behaviors were enrolled, including 180 freshmen (25.00%), 178 sophomores (24.72%), 163 juniors (22.64%), 50 seniors (6.94%) and 149 postgraduates (20.69%), and 94 students received HIV testing (13.06%), including 57.45% receiving self-testing. Multivariable logistic regression analysis identified postgraduates (OR=0.302, 95%CI: 0.127-0.719), sexual orientation (homosexual, OR=0.090, 95%CI: 0.028-0.294; bisexual/uncertain, OR=0.181, 95%CI: 0.066-0.495), awareness of HIV testing (low awareness, OR=0.411, 95%CI: 0.176-0.957; moderate awareness, OR=0.305, 95%CI: 0.123-0.757; high awareness, OR=0.087, 95%CI: 0.032-0.235) as factors affecting HIV testing among male college students with sexual behaviors. Conclusions The prevalence of HIV testing correlates with awareness of HIV testing among male college students with sexual behaviors. Improvements in health education of HIV testing and accessibility of HIV testing services are recommended.

Objective: To investigate the characteristics of temporary heterosexual behaviors among male college students through Internet dating, so as to provide insights into HIV/AIDS control among young college students. Methods: A total of 15 universities/colleges were sampled from Zhejiang Province using a stratified cluster sampling method, and 3 schools/departments were sampled from each university/college. Male college students with temporary heterosexual behaviors during the past year were recruited. Participants' demographics, AIDS-related knowledge, compliance to HIV/AIDS interventions, Internet dating and sexual behaviors were collected, and the characteristics of male college students with Internet dating were analyzed. Results : A total of 326 students were enrolled, including 202 participants from regular institutions of higher education (61.96%) and 124 students from higher vocational colleges (38.04%). There were 79 freshmen (24.23%), 99 sophomores (30.37%), 104 juniors (31.90%) and 44 seniors (13.50%), and there were 100 participants (30.67%) with temporary heterosexual behaviors through Internet dating during the past year. Among the 100 participants, there were 75.00% of participants knowing “man who have sex with man is the main transmission pattern of AIDS among young students in China”, 93.00% knowing “insisting on accurate use of condoms may reduce the risk of HIV infections and transmission” and 93.00% knowing “seeking HIV testing and counseling actively following high-risk behaviors”. There were 77 participants (77.00%) with students as their temporary heterosexual partners, 17 participants (17.00%) that had received HIV self-testing and 17 participants (17.00%) that had received HIV testing in medical institutions, 22 participants (22.00%) that had never used condoms during temporary heterosexual behaviors during the past year, and 29 participants (29.00%) with commercial sexual behaviors during the past year. In addition, male college students with temporary heterosexual behaviors through Internet dating were more unlikely to use condoms and more likely to have commercial sexual behaviors than those with dating through other ways (P<0.05). Conclusions Male college students with temporary heterosexual behaviors through Internet dating are more likely to have high-risk sexual behaviors than those with dating through other ways. Internet-based mobile sexual education and HIV/AIDS health education are recommended.

Objective : To investigate the factors affecting multiple sexual partner behaviors among men who have sex with men (MSM) at ages of 16 to 24 years in Zhejiang Province, so as to provide the evidence for formulating the integrated interventions for HIV/AIDS among adolescents. Methods : The demographic features, sexual behaviors and HIV testing were collected from MSM at ages of 16 to 24 years in Zhejiang Province through the Management Information System of China AIDS Fund for Non-governmental Organizations (CAFNGO) in 2021. The factors affecting multiple sexual partner behaviors were identified among MSM at ages of 16 to 24 years using a multivariable logistic regression model. Results : A total of 1 253 participants were enrolled, with a mean age of (21.16±2.06) years. There were 1 219 unmarried respondents (97.29%), 807 (64.61%) with diploma and above, 250 (19.95%) with multiple sexual partners during the past 3 months, 344 (27.45%) with unprotected sexual behaviors in the past 3 months, 71 (5.67%) that had used rush or new drugs, 511 (40.78%) that were unaware of their sexual partners' HIV infections, 28 (2.23%) with symptoms or diagnosis of sexually transmitted diseases, and 35 (2.79%) with positive HIV testing. Multivariable logistic regression analysis identified age (19 years-, OR=2.563, 95%CI: 1.404-4.679; 22 to 24 years, OR=2.149, 95%CI: 1.180-3.913), having unprotected sexual behaviors in the past 3 months (OR=5.338, 95%CI: 3.938-7.237), having used rush or new drugs in the past 3 months (OR=3.669, 95%CI: 2.142-6.286), unaware of sexual partners' HIV infections(OR=1.402, 95%CI: 1.032-1.903), and positive HIV tests (OR=2.763, 95%CI: 1.298-5.880) as factors affecting multiple sexual behaviors among MSM at ages of 16 to 24 years. Conclusions The multiple sexual behaviors correlate with age, unprotected sexual behaviors, use of rush or new drugs and unawareness of sexual partners' HIV infections among MSM at ages of 16 to 24 years.