title: [Study on the changes of demography and behavioral characteristics of drug users in Beijing].
abstract: OBJECTIVE
  To understand the demography changes and behaviors in drug users.
  
  
  METHODS
  Self-reported questionnaires was used and longitudinal investigation was conducted in one of the detoxication centers in Beijing in 1998 and 2000. Drug users were randomly chosen.
  
  
  RESULTS
  Results showed that age of drug users tend to become younger with the numbers of drug users aged below 25, increased from 18.7% in 1998 to 28.2% in 2000. Majority of drug users remained males, but the proportion of females seemed to increase. Distribution of occupation showed that the largest increase fell among individual enterprisers, from 15.2% in 1998 to 25.9% in 2000. With educational back-ground, the proportion of lower than elementary education level, including illiterate, increased. Fifty percent of drug users were unmarried which increased from 40.8% in 1998 to 53.2% in 2000. Needle sharing was quite common, 16.5% in 1998 and 11.9% in 2000, but the decrease was not statistically significant (P > 0.05). Fifty-seven point three percent of the injecting drug users did not have constant partners to share equipments. Proportion of extra-marriage sexual practice increased from 12.5% in 1998 to 27.5% in 2000, and significant difference (Chi-square = 12.50, P < 0.001). Multiple partners in extra-married drug users was also found (mean = 2). Compared to 1998, condom use during every sexual practice increased in 2000, but 47.7% drug users still never used condom.
  
  
  CONCLUSIONS
  In summary, as the quick increase of drug users, sharing of injecting equipment and high-risk sexual behavior, including multiple partners and unprotected sex, were quite common, with the possibility of HIV epidemic in drug users.
authors.affiliation: Beijing Center for Disease Prevention and Control, Beijing 100013, China.
authors.forename: Tian-xin
authors.initials: TX
authors.lastname: Chu
authors.forename: Gui-ying
authors.initials: GY
authors.lastname: Li
authors.forename: Hai-lin
authors.initials: HL
authors.lastname: Liu
authors.forename: Jiang
authors.initials: J
authors.lastname: Wu
authors.forename: Yao-wu
authors.initials: YW
authors.lastname: Tang
authors.forename: Wei-dong
authors.initials: WD
authors.lastname: Sun
authors.forename: Xin-ling
authors.initials: XL
authors.lastname: Bian
mesh_terms: D000328:Adult; D002681:China / Q000453:epidemiology; D003710:Demography; D005260:Female; D015658:HIV Infections / Q000453:epidemiology*; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D016485:Needle Sharing / Q000009:adverse effects*; D015995:Prevalence; D012307:Risk Factors; D021841:Safe Sex / Q000706:statistics & numerical data; D015819:Substance Abuse, Intravenous / Q000453:epidemiology*; D011795:Surveys and Questionnaires