1.Overlapping Reflux Symptoms in Functional Dyspepsia Are Mostly Unrelated to Gastroesophageal Reflux
Songfeng CHEN ; Xingyu JIA ; Qianjun ZHUANG ; Xun HOU ; Kewin T H SIAH ; Mengyu ZHANG ; Fangfei CHEN ; Niandi TAN ; Junnan HU ; Yinglian XIAO
Journal of Neurogastroenterology and Motility 2025;31(2):218-226
Background/Aims:
Reflux symptoms frequently present in patients diagnosed with functional dyspepsia (FD). This investigation sought to elucidate the contribution of gastroesophageal reflux in the overlap relationship.
Methods:
Consecutive patients presenting with reflux symptoms and/or FD symptoms were prospectively included. Comprehensive assessments, including symptoms evaluation, endoscopy, esophageal functional examinations (high-resolution manometry and reflux monitoring), and proton pump inhibitor (PPI) treatment efficacy evaluation, were conducted in these patients.
Results:
The study enrolled 315 patients, 43.2% of which had concurrent FD symptoms and overlapping reflux symptoms. Notably, a mere 28.7% of patients in the overlap symptoms group had objective gastroesophageal reflux disease evidences (the grade of esophagitis≥ B or the acid exposure time ≥ 4.2%). Functional heartburn was demonstrated to be the main cause of overlapping reflux symptoms(55.1%). Reflux parameters analysis revealed that the reflux burden in the overlap symptoms group paralleled that of the FD symptoms group, with both registering lower levels than the reflux symptoms group (P < 0.05). Furthermore, PPI response rates were notably diminished in the overlap symptoms group (P < 0.001), even for those with objective gastroesophageal reflux disease evidences.
Conclusions
The study illuminated that overlapping reflux symptoms in FD was common. Strikingly, these symptoms primarily diverged from reflux etiology and exhibited suboptimal responses to PPI intervention. These findings challenge prevailing paradigms and accentuate the imperative for nuanced therapeutic approaches tailored to the distinctive characteristics of overlapping reflux symptoms in the context of FD.
2.Overlapping Reflux Symptoms in Functional Dyspepsia Are Mostly Unrelated to Gastroesophageal Reflux
Songfeng CHEN ; Xingyu JIA ; Qianjun ZHUANG ; Xun HOU ; Kewin T H SIAH ; Mengyu ZHANG ; Fangfei CHEN ; Niandi TAN ; Junnan HU ; Yinglian XIAO
Journal of Neurogastroenterology and Motility 2025;31(2):218-226
Background/Aims:
Reflux symptoms frequently present in patients diagnosed with functional dyspepsia (FD). This investigation sought to elucidate the contribution of gastroesophageal reflux in the overlap relationship.
Methods:
Consecutive patients presenting with reflux symptoms and/or FD symptoms were prospectively included. Comprehensive assessments, including symptoms evaluation, endoscopy, esophageal functional examinations (high-resolution manometry and reflux monitoring), and proton pump inhibitor (PPI) treatment efficacy evaluation, were conducted in these patients.
Results:
The study enrolled 315 patients, 43.2% of which had concurrent FD symptoms and overlapping reflux symptoms. Notably, a mere 28.7% of patients in the overlap symptoms group had objective gastroesophageal reflux disease evidences (the grade of esophagitis≥ B or the acid exposure time ≥ 4.2%). Functional heartburn was demonstrated to be the main cause of overlapping reflux symptoms(55.1%). Reflux parameters analysis revealed that the reflux burden in the overlap symptoms group paralleled that of the FD symptoms group, with both registering lower levels than the reflux symptoms group (P < 0.05). Furthermore, PPI response rates were notably diminished in the overlap symptoms group (P < 0.001), even for those with objective gastroesophageal reflux disease evidences.
Conclusions
The study illuminated that overlapping reflux symptoms in FD was common. Strikingly, these symptoms primarily diverged from reflux etiology and exhibited suboptimal responses to PPI intervention. These findings challenge prevailing paradigms and accentuate the imperative for nuanced therapeutic approaches tailored to the distinctive characteristics of overlapping reflux symptoms in the context of FD.
3.Overlapping Reflux Symptoms in Functional Dyspepsia Are Mostly Unrelated to Gastroesophageal Reflux
Songfeng CHEN ; Xingyu JIA ; Qianjun ZHUANG ; Xun HOU ; Kewin T H SIAH ; Mengyu ZHANG ; Fangfei CHEN ; Niandi TAN ; Junnan HU ; Yinglian XIAO
Journal of Neurogastroenterology and Motility 2025;31(2):218-226
Background/Aims:
Reflux symptoms frequently present in patients diagnosed with functional dyspepsia (FD). This investigation sought to elucidate the contribution of gastroesophageal reflux in the overlap relationship.
Methods:
Consecutive patients presenting with reflux symptoms and/or FD symptoms were prospectively included. Comprehensive assessments, including symptoms evaluation, endoscopy, esophageal functional examinations (high-resolution manometry and reflux monitoring), and proton pump inhibitor (PPI) treatment efficacy evaluation, were conducted in these patients.
Results:
The study enrolled 315 patients, 43.2% of which had concurrent FD symptoms and overlapping reflux symptoms. Notably, a mere 28.7% of patients in the overlap symptoms group had objective gastroesophageal reflux disease evidences (the grade of esophagitis≥ B or the acid exposure time ≥ 4.2%). Functional heartburn was demonstrated to be the main cause of overlapping reflux symptoms(55.1%). Reflux parameters analysis revealed that the reflux burden in the overlap symptoms group paralleled that of the FD symptoms group, with both registering lower levels than the reflux symptoms group (P < 0.05). Furthermore, PPI response rates were notably diminished in the overlap symptoms group (P < 0.001), even for those with objective gastroesophageal reflux disease evidences.
Conclusions
The study illuminated that overlapping reflux symptoms in FD was common. Strikingly, these symptoms primarily diverged from reflux etiology and exhibited suboptimal responses to PPI intervention. These findings challenge prevailing paradigms and accentuate the imperative for nuanced therapeutic approaches tailored to the distinctive characteristics of overlapping reflux symptoms in the context of FD.
4.Clinical efficacy analysis of autologous rib cartilage reconstruction for finger hemiarticular defects
Zhiyu HU ; Chaofeng XING ; Tao YANG ; Jia CHEN ; Zirun XIAO ; Xiazhi LIU ; Li SONG ; Beibei CHENG ; Yingjie XIONG ; Guangchao ZHANG ; Songfeng YANG
Journal of Clinical Surgery 2025;33(6):641-645
Objective Exploring the clinical efficacy of using autologous rib cartilage grafting to reconstruct finger hemiarticular defects.Methods From August 2022 to February 2024,for 6 patients with hemiarticular surface defects in the metacarpophalangeal joints and interphalangeal joints of 8 fingers,costal cartilage was used for joint remodeling and transplantation to reconstruct the hemiarticular surface defects of the fingers.All 8 joint transplants in 6 patients were two-stage surgeries.In the first stage,antibiotic bone cement was used to fill the space-occupying lesions,and in the second stage,costal cartilage joint remodeling was performed to reconstruct the finger joint defects.Postoperative follow-up and assessment of fracture healing according to Paley fracture healing scoring criteria.Outpatient and WeChat follow-up,upper limb function is evaluated according to the upper limb functional assessment standards of the Chinese Medical Association Hand Surgery Society.Record VAS pain score.Results In this group,there were a total of 6 patients with 8 cases of hemiarticular defects.Among them,2 patients had two joint surgical sites,while the remaining 4 patients had a single joint surgical site.There were 2 cases of metacarpophalangeal joint head defects,2 cases of proximal articular surface defects,3 cases of proximal articular head defects,and 1 case of thumb proximal articular head defect.After surgery,8 out of 6 patients'hand wounds healed successfully.All patients were followed up for 6-12 months postoperatively,with an average of 9 months.The VAS pain score(affected finger)for the last follow-up was 0-2 points,with an average of 0.6 points.According to Paley's scoring criteria,all 6 patients had excellent fracture healing.According to the evaluation criteria for upper limb functional assessment of the Chinese Medical Association Hand Surgery Society,3 cases were rated as excellent,3 cases were rated as good,and 2 cases were rated as fair.Conclusion For patients with half joint defects on one side of the finger,rib rib cartilage was used for joint reconstruction,which significantly improved the joint shape and function at the defect site,and reduced joint pain scores.
5.Clinical efficacy analysis of autologous rib cartilage reconstruction for finger hemiarticular defects
Zhiyu HU ; Chaofeng XING ; Tao YANG ; Jia CHEN ; Zirun XIAO ; Xiazhi LIU ; Li SONG ; Beibei CHENG ; Yingjie XIONG ; Guangchao ZHANG ; Songfeng YANG
Journal of Clinical Surgery 2025;33(6):641-645
Objective Exploring the clinical efficacy of using autologous rib cartilage grafting to reconstruct finger hemiarticular defects.Methods From August 2022 to February 2024,for 6 patients with hemiarticular surface defects in the metacarpophalangeal joints and interphalangeal joints of 8 fingers,costal cartilage was used for joint remodeling and transplantation to reconstruct the hemiarticular surface defects of the fingers.All 8 joint transplants in 6 patients were two-stage surgeries.In the first stage,antibiotic bone cement was used to fill the space-occupying lesions,and in the second stage,costal cartilage joint remodeling was performed to reconstruct the finger joint defects.Postoperative follow-up and assessment of fracture healing according to Paley fracture healing scoring criteria.Outpatient and WeChat follow-up,upper limb function is evaluated according to the upper limb functional assessment standards of the Chinese Medical Association Hand Surgery Society.Record VAS pain score.Results In this group,there were a total of 6 patients with 8 cases of hemiarticular defects.Among them,2 patients had two joint surgical sites,while the remaining 4 patients had a single joint surgical site.There were 2 cases of metacarpophalangeal joint head defects,2 cases of proximal articular surface defects,3 cases of proximal articular head defects,and 1 case of thumb proximal articular head defect.After surgery,8 out of 6 patients'hand wounds healed successfully.All patients were followed up for 6-12 months postoperatively,with an average of 9 months.The VAS pain score(affected finger)for the last follow-up was 0-2 points,with an average of 0.6 points.According to Paley's scoring criteria,all 6 patients had excellent fracture healing.According to the evaluation criteria for upper limb functional assessment of the Chinese Medical Association Hand Surgery Society,3 cases were rated as excellent,3 cases were rated as good,and 2 cases were rated as fair.Conclusion For patients with half joint defects on one side of the finger,rib rib cartilage was used for joint reconstruction,which significantly improved the joint shape and function at the defect site,and reduced joint pain scores.
6.The effects of mast cells and 5-hydroxytryptamine on the efficacy of Shugan Jieyu capsule in the treatment of functional dyspepsia
Zhanye ZHANG ; Qianjun ZHUANG ; Xingyu JIA ; Niandi TAN ; Fangfei CHEN ; Mengyu ZHANG ; Songfeng CHEN ; Junnan HU ; Yinglian XIAO
Chinese Journal of Digestion 2024;44(10):679-685
Objective:To investigate the possible targets of Shugan Jieyu capsules (SGJY) in the treatment of functional dyspepsia (FD).Methods:From January 1, 2022 to September 30, 2023, a total of 36 FD patients who visited the Department of Gastroenterology and Hepatology, the First Affiliated Hospital of Sun Yat-sen University were prospectively enrolled, and 10 healthy controls were included during the same period. The symptoms and quality of life of FD patients and healthy controls were evaluated with FD symptom scale and short form-Nepean dyspepsia index (SF-NDI), respectively, the anxiety and depression status of FD patients and healthy controls were assessed with the hospital anxiety and depression scale (HADS). The mucosal tissues of gastric fundus and descending duodenum were collected to count the numbers of eosinophils, mast cells, 5-hydroxytryptamine-positive (5-HT + ) cells and detect the expression of zonula occluden-1(ZO-1), occludin, and Claudin 2. FD patients received SGJY (0.72 g, twice daily) for 6 weeks. After treatment, a decrease in FD symptom score of >50% compared with baseline was considered as SGJY response, while a decrease of <50% was considered as SGJY non-response. Receiver operating characteristic cuve (ROC) analysis was performed to analyze and evaluate the predictive value of indicators for the response of SGJY, and Spearman rank correlation was used for correlation analysis. One-way analysis of variance, Kruskal-Wallis H test, and chi-square test were used for statistical analysis. Results:A total of 9 FD patients without anxiety or depression, and 27 FD patients with anxiety or depression were included. Among the 36 FD patients, 18 patients responded to SGJY, with a response rate 50.0%. Eleven FD patients with anxiety or depression responded to SGJY, 7 FD patients without anxiety or depression responded to SGJY. HADS scores and SF-NDI scores of FD patients with anxiety or depression were all higher than those of FD patients without anxiety or depression and healthy controls (8.7±0.7 vs. 4.0±0.6 and 3.5±0.8; 10.4±0.6 vs. 4.0±0.7 and 5.0±0.8; 29.0(22.5, 36.0) vs. 21.0 (14.0, 24.5) and 10.0 (10.0, 13.3)); and the differences were statistically significant ( F=14.50, 27.07; H=25.19; all P<0.001). The 5-HT + cell count in the descending duodenum and mast cell count in the gastric fundus and degranulation score of SGJY responders were all higher than those of SGJY non-responders and healthy controls ((65.8±4.1)/mm 2vs. (54.9±3.6) and (48.3±3.7)/mm 2, (14.0±1.2)/high power field vs. (10.5±0.7) and (9.0±1.1)/high power field, 7.5±0.5 vs. 5.7±0.4 and 3.4±0.4); and the differences were statistically significant ( F=4.38, 3.72, 12.56; all P<0.05). There were no statistically significant differences in the 5-HT + cell count in the descending duoclenum and mast cell count in the gastric fundus between non-responders and healthy controls (all P>0.05). The results of Spearman rank correlation showed that mast cell count in the gastric fundus degranulation score positively correlated with total symptom score ( r=0.636, P<0.001). In FD patients with anxiety or depression, the 5-HT + cell count in the descending duodenum and mast cell count in the gastric fundus and degranulation score of SGJY responders were higher than those of SGJY non-responders and healthy controls ((68.9±6.3)/mm 2vs. (48.0±3.4) and (56.0±4.1)/mm 2, (14.8±1.7)/high power field vs. (9.0±1.1) and (11.0±0.8)/high power field, 7.3±0.6 vs. 5.6±0.5 and 3.4±0.4); and the differences were statistically significant ( F=4.10, 5.56, 12.38; all P<0.05). The result of ROC analysis revealed that 5-HT + cell count in the descending duoclenum could predict the response to SGJY. When the cut-off value of 5-HT + cell count in the descending duoclenum was 55.12 /mm 2, the sensitivity was 82.4% and the specificity was 61.1% (area under the curve=0.700, P=0.046). Conclusion:SGJY may alleviate FD symptoms by inhibiting mast cell in the gastric fundus and regulating 5-HT + cell in the descending duoclenum.
7.The effects of mast cells and 5-hydroxytryptamine on the efficacy of Shugan Jieyu capsule in the treatment of functional dyspepsia
Zhanye ZHANG ; Qianjun ZHUANG ; Xingyu JIA ; Niandi TAN ; Fangfei CHEN ; Mengyu ZHANG ; Songfeng CHEN ; Junnan HU ; Yinglian XIAO
Chinese Journal of Digestion 2024;44(10):679-685
Objective:To investigate the possible targets of Shugan Jieyu capsules (SGJY) in the treatment of functional dyspepsia (FD).Methods:From January 1, 2022 to September 30, 2023, a total of 36 FD patients who visited the Department of Gastroenterology and Hepatology, the First Affiliated Hospital of Sun Yat-sen University were prospectively enrolled, and 10 healthy controls were included during the same period. The symptoms and quality of life of FD patients and healthy controls were evaluated with FD symptom scale and short form-Nepean dyspepsia index (SF-NDI), respectively, the anxiety and depression status of FD patients and healthy controls were assessed with the hospital anxiety and depression scale (HADS). The mucosal tissues of gastric fundus and descending duodenum were collected to count the numbers of eosinophils, mast cells, 5-hydroxytryptamine-positive (5-HT + ) cells and detect the expression of zonula occluden-1(ZO-1), occludin, and Claudin 2. FD patients received SGJY (0.72 g, twice daily) for 6 weeks. After treatment, a decrease in FD symptom score of >50% compared with baseline was considered as SGJY response, while a decrease of <50% was considered as SGJY non-response. Receiver operating characteristic cuve (ROC) analysis was performed to analyze and evaluate the predictive value of indicators for the response of SGJY, and Spearman rank correlation was used for correlation analysis. One-way analysis of variance, Kruskal-Wallis H test, and chi-square test were used for statistical analysis. Results:A total of 9 FD patients without anxiety or depression, and 27 FD patients with anxiety or depression were included. Among the 36 FD patients, 18 patients responded to SGJY, with a response rate 50.0%. Eleven FD patients with anxiety or depression responded to SGJY, 7 FD patients without anxiety or depression responded to SGJY. HADS scores and SF-NDI scores of FD patients with anxiety or depression were all higher than those of FD patients without anxiety or depression and healthy controls (8.7±0.7 vs. 4.0±0.6 and 3.5±0.8; 10.4±0.6 vs. 4.0±0.7 and 5.0±0.8; 29.0(22.5, 36.0) vs. 21.0 (14.0, 24.5) and 10.0 (10.0, 13.3)); and the differences were statistically significant ( F=14.50, 27.07; H=25.19; all P<0.001). The 5-HT + cell count in the descending duodenum and mast cell count in the gastric fundus and degranulation score of SGJY responders were all higher than those of SGJY non-responders and healthy controls ((65.8±4.1)/mm 2vs. (54.9±3.6) and (48.3±3.7)/mm 2, (14.0±1.2)/high power field vs. (10.5±0.7) and (9.0±1.1)/high power field, 7.5±0.5 vs. 5.7±0.4 and 3.4±0.4); and the differences were statistically significant ( F=4.38, 3.72, 12.56; all P<0.05). There were no statistically significant differences in the 5-HT + cell count in the descending duoclenum and mast cell count in the gastric fundus between non-responders and healthy controls (all P>0.05). The results of Spearman rank correlation showed that mast cell count in the gastric fundus degranulation score positively correlated with total symptom score ( r=0.636, P<0.001). In FD patients with anxiety or depression, the 5-HT + cell count in the descending duodenum and mast cell count in the gastric fundus and degranulation score of SGJY responders were higher than those of SGJY non-responders and healthy controls ((68.9±6.3)/mm 2vs. (48.0±3.4) and (56.0±4.1)/mm 2, (14.8±1.7)/high power field vs. (9.0±1.1) and (11.0±0.8)/high power field, 7.3±0.6 vs. 5.6±0.5 and 3.4±0.4); and the differences were statistically significant ( F=4.10, 5.56, 12.38; all P<0.05). The result of ROC analysis revealed that 5-HT + cell count in the descending duoclenum could predict the response to SGJY. When the cut-off value of 5-HT + cell count in the descending duoclenum was 55.12 /mm 2, the sensitivity was 82.4% and the specificity was 61.1% (area under the curve=0.700, P=0.046). Conclusion:SGJY may alleviate FD symptoms by inhibiting mast cell in the gastric fundus and regulating 5-HT + cell in the descending duoclenum.
8.Achalasia: The Current Clinical Dilemma and Possible Pathogenesis
Xingyu JIA ; Songfeng CHEN ; Qianjun ZHUANG ; Niandi TAN ; Mengyu ZHANG ; Yi CUI ; Jinhui WANG ; Xiangbin XING ; Yinglian XIAO
Journal of Neurogastroenterology and Motility 2023;29(2):145-155
Achalasia is a primary esophageal motility disorder manifested by dysphagia and chest pain that impair patients’ quality of life, and it also leads to chronic esophageal inflammation by food retention and increases the risk of esophageal cancer. Although achalasia has long been reported, the epidemiology, diagnosis and treatment of achalasia are not fully understood. The current clinical dilemma of achalasia is mainly due to its unclear pathogenesis. In this paper, epidemiology, diagnosis treatment, as well as possible pathogenesis of achalasia will be reviewed and summarized. The proposed hypothesis on the pathogenesis of achalasia is that genetically susceptible populations potentially have a higher risk of infection with viruses, triggering autoimmune and inflammation responses to inhibitory neurons in lower esophageal sphincter.
9.Analysis on accuracy and influencing factors of oral fluid-based rapid HIV self-testing among men who have sex with men.
Youfang LI ; Yumiao WANG ; Renzhong ZHANG ; Jue WANG ; Zhiqing LI ; Ling WANG ; Songfeng PAN ; Yanling YANG ; Yanling MA ; Manhong JIA
Chinese Journal of Epidemiology 2016;37(1):72-75
OBJECTIVETo understood the accuracy of oral fluid-based rapid HIV self-testing among men who have sex with men (MSM) and related factors.
METHODSSurvey was conducted among MSM selected through non-probability sampling to evaluate the quality of their rapid HIV self-testing, and related information was analyzed.
RESULTSThe most MSM were aged 21-30 years (57.0%). Among them, 45.7% had educational level of college or above, 78.5% were unmarried, 59.3% were casual laborers. The overall accuracy rate of oral fluid based self-testing was 95.0%, the handling of"inserting test paper into tube as indicated by arrow on it"had the highest accuracy rate (98.0%), and the handling of"gently upsetting tube for 3 times"had lowest accuracy rate (65.0%); Chi-square analysis showed that educational level, no touch with middle part of test paper, whether reading the instruction carefully, whether understanding the instruction and inserting test paper into tube as indicated by the arrow on it were associated with the accuracy of oral fluid-based rapid HIV self-testing, (P<0.05). Multivariate logistic regression analysis indicated that educational level, no touch with middle part of test paper and understanding instructions were associated with the accuracy of oral fluid-based rapid HIV self-testing.
CONCLUSIONSThe accuracy of oral fluid-based rapid HIV self-testing was high among MSM, the accuracy varied with the educational level of the MSM. Touch with the middle part of test paper or not and understanding the instructions or not might influence the accuracy of the self-testing.
Adult ; Demography ; HIV Infections ; diagnosis ; Homosexuality, Male ; Humans ; Male ; Mass Screening ; methods ; Saliva ; Self Care ; Surveys and Questionnaires ; Young Adult
10.Analysis of the risky behaviors among HIV positive female sex workers.
Jue WANG ; Manhong JIA ; Hongbing LUO ; Youfang LI ; Lijun SONG ; Jingyuan MEI ; Yanling MA ; Yanling YANG ; Ran LU ; Ling WANG ; Renzhong ZHANG ; Songfeng PAN ; Zhiqing LI ; Lin LU ; Email: LULIN@YNCDC.CN.
Chinese Journal of Preventive Medicine 2015;49(11):978-982
OBJECTIVETo analyze the characteristics of risky behaviors among different age groups of HIV positive female sex workers, and to explore the strengthening of their management.
METHODSFrom January to June 2014, 22 814 female sex workers were investigated and tested HIV in 117 sentinel surveillance sites in Yunnan Province, and 181 were confirmed to be HIV antibody positive, who accepted questionnaire surveys. According to the age, the participants were divided into the < 35 years old age group and ≥ 35 years old age group. The demographic characteristics, knowledge about HIV/AIDS and related risk behaviors characteristics of the two groups were obtained via questionnaire surveys among 181 HIV positive female sex workers, and in-depth qualitative interviews were conducted from among 12 HIV positive sex workers.
RESULTSHIV antibody positive rate was 0.8% (181), the age of the 181 subjects were (35.83 ± 9.17) years old, 76 cases (42.0%) were < 35 years old, and 105 cases (58.0%) were ≥ 35 years old. The differences of marital status, workplace class, the last work site among two groups were statistically significant (χ(2) = 20.80, 28.32, 7.83; P < 0.001, P < 0.001, P = 0.020, respectively). Among 181 HIV, the proportion of AIDS awareness was 95.6% (173); the proportion of drug use among ≥ 35 years old age group was 51.4% (54), which was higher than that in < 35 years old age group (34.2%, 26/76) (χ(2) = 5.30, P = 0.021). 96.7% (175) received condom promotion or HIV counseling and testing in the past year. The proportion of continuing to engage in sexual services over 5 years after HIV infection was 48.5% (51/105) and the proportion of receiving antiretroviral treatment was 69.5% (73/105) in ≥ 35 years old age group, which were higher than those in the < 35 age group (30.2% (23/76), 52.6% (40/76); χ(2) = 12.26, 5.36; P = 0.002, 0.021, respectively). In-depth interviews among 12 HIV positive female sex workers found that regular clients, not consistent use of condoms were the main cause of no condom use. Economic and livelihood factors are important reasons for continuing to engage in sexual services among HIV positive sex workers.
CONCLUSIONHIV positive sex workers still have high risk behaviors including continuing to engage in commercial sexual service and no condom use after knowing their HIV infection status, and the proportion of using drugs in the ≥ 35 years old group was higher than that in < 35 years old group.
Adult ; China ; Condoms ; Female ; HIV Seropositivity ; Humans ; Marital Status ; Risk Factors ; Risk-Taking ; Safe Sex ; Sex Workers ; statistics & numerical data ; Sexual Behavior ; Substance-Related Disorders ; Surveys and Questionnaires

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