title: [Behaviors on drug-abuse and prevalence of sexually transmitted diseases among drug users in Tianjin, China, from 2011 to 2015].
abstract: OBJECTIVE
  To understand the change of behavioral characteristics among drug users (DUS) in Tianjin and the prevalence rates of major sexually transmitted disease infections. A series of cross-sectional surveys were used.
  
  
  METHODS
  Between April and June, 2011 to 2015, a cross-sectional survey with face to face interview, was undertaken. Interview was conducted among DUS who entered the drug rehabilitation center and blood samples were drawn to test for HIV/syphilis/HCV infections. Multivariate logistic regression analysis was used to analyze the relationship between the infection of major sexually transmitted diseases and drug abuse or sexual behavior.
  
  
  RESULTS
  2 000 DUS were included during the 5-year study, with the average age of the DUS as 34.5 ± 8.7. Female accounted for 17.9% and club drug (new drugs) users accounted 45.4% of the participants, with its proportion increasing over the years. Comparing to traditional drug users, club drug users showed more sexual activities with partners, but lower proportion of condom use. Prevalence rates of HIV/Syphilis and HCV were 1.3%, 11.0%, 52.0%, respectively. The prevalence of syphilis among club drug users was significantly higher than those on traditional-drug use (χ(2)=67.778,P<0.001). Data from Binary logistic regression analysis showed that club drug use (adjusted OR=1.607, 95% CI:1.191-2.170) and females (adjusted OR=5.287, 95%CI: 3.824-7.311) were associated with syphilis infection among DUS.
  
  
  CONCLUSIONS
  Drug abuse behavior changed among the drug abuse in Tianjin. Proportion of club drug use continued to increase so as the risk of infected sexually transmitted diseases.
authors.affiliation: Department of AIDS/STD Prevention and Control, Tianjin Center for Disease Control and Prevention, Tianjin 300011, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Guo
authors.affiliation: Department of AIDS/STD Prevention and Control, Tianjin Center for Disease Control and Prevention, Tianjin 300011, China.
authors.forename: N
authors.initials: N
authors.lastname: Zhou
authors.affiliation: Department of AIDS/STD Prevention and Control, Tianjin Hebei District Center for Disease Control and Prevention, Tianjin 300150, China.
authors.forename: J
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of AIDS/STD Prevention and Control, Tianjin Center for Disease Control and Prevention, Tianjin 300011, China.
authors.forename: T L
authors.initials: TL
authors.lastname: Ning
authors.affiliation: Division of Epidemiology, National Center for AIDS/STD Control and Prevention, Chinese center for Disease Control and Prevention, Beijing 102206, China.
authors.forename: W
authors.initials: W
authors.lastname: Guo
mesh_terms: D000328:Adult; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D055030:Drug Users / Q000523:psychology* / Q000706:statistics & numerical data*; D005260:Female; D015658:HIV Infections / Q000453:epidemiology; D006526:Hepatitis C / Q000453:epidemiology; D006801:Humans; D013287:Illicit Drugs; D008297:Male; D015995:Prevalence; D012725:Sexual Behavior / Q000523:psychology / Q000706:statistics & numerical data; D012749:Sexually Transmitted Diseases / Q000453:epidemiology*; D019966:Substance-Related Disorders / Q000453:epidemiology*; D013587:Syphilis / Q000453:epidemiology
chemical_list: D013287:Illicit Drugs