Childhood sexual abuse and age at initiation of injection drug use

OBJECTIVES: We examined the relation between childhood sexual abuse and injection drug use initiation among young adult injection drug users. METHODS: We used mixed effect linear models to compare age at first injection among 2143 young injection drug users by first sexual abuse age categories. RESULTS: The participants were predominantly male (63.3%) and White (52.8%). Mean age and age at first injection were 23.7 and 19.6 years, respectively; 307 participants (14.3%) reported childhood sexual abuse. After adjustment for gender, race/ethnicity, noninjection drug use before first injection drug use, and recruitment site, childhood sexual abuse was independently associated with younger age at first injection. CONCLUSIONS: Childhood sexual abuse was associated with earlier initiation of injection drug use. These data emphasize the need to integrate substance abuse prevention with postvictimization services for children and adolescents.     

Solarium use in Australia,recent trends and context

Objectives: To describe the prevalence of solarium use among representative samples of Australian adolescents (12–17 years) and adults (18–69 years). Methods: In national surveys conducted in 2003/04 and 2006/07 using equivalent methods, n=11,509 Australian adolescents and adults self‐reported their use of solaria. Results: In 2006/07 10.6% of adults had ‘ever’ used a solarium, and use was most prevalent among women aged 18 to 24 (17.1%) and 25 to 44 (20.7%). Few adolescents (2.5%) had ever used a solarium. The prevalence of past year use was much lower (0.6% of adolescents, 1.5% of adults) and there was a significant reduction among adults between surveys (OR=0.69, 95% CI=0.52–0.94). Adults’ attitudes related to past year solarium use were preference for a suntan (OR=4.68, 95% CI=2.48–8.85); perceived protan attitudes of peers (OR=2.10, 95% CI=1.17–3.77), belief that a suntan looks healthy (OR=1.92, 95% CI=1.09–3.39); and perceiving they have some risk of getting skin cancer (OR=1.69, 95% CI=1.03–2.78). Conclusions and implications: Although solarium use in Australia is relatively low, it is highest among young adult women. These data show encouraging downward trends in use, and provide a foundation for monitoring the impact of forthcoming regulatory changes to the solarium industry.     

Effects of race, neighborhood, and social network on age at initiation of injection drug use

OBJECTIVES: We investigated individual- and neighborhood-level factors associated with adolescent initiation of injection drug use. METHODS: Injection drug users (IDUs) who had been injecting 2 to 5 years underwent HIV testing and completed a sociobehavioral risk survey. Modeling techniques accounting for intraneighborhood correlations were used in data analyses. RESULTS: Adolescent-initiating IDUs were less likely than adult-initiating IDUs to report high-risk sex and injection behaviors and more likely to report high-risk networks. African American IDUs from neighborhoods with large percentages of minority residents and low adult educational levels were more likely to initiate injection during adolescence than White IDUs from neighborhoods with low percentages of minority residents and high adult education levels. CONCLUSIONS: Racial segregation and neighborhood-level educational attainment must be considered when drawing inferences about age at initiation of injection drug use and related high-risk behaviors.     

Dynamic compartmental model of trends in Australian drug use

A five-state compartment model of trends in illicit drug use in Australia is parameterized using data from multiple sources. The model reproduces historical prevalence and supports what-if analyses under the assumption that past trajectories of drug escalation and desistance persist. For fixed initiation, the system has a unique stable equilibrium. The chief qualitative finding is that even though some users escalate rapidly, regular injection drug use still adjusts to changes in incidence with considerable inertia and delay. This has important policy implications, e.g., concerning the timing of reductions in drug-related social cost generated by interventions that reduce the social cost per injection user versus those that cut drug initiation.     

Gender differences in the initiation of injection drug use among young adults

To characterize the circumstances surrounding initiation of injecting drug use, data were collected from 229 young, recently initiated injection drug users enrolled through community-based recruitment in Baltimore, Maryland. Gender differences in the pattern of initiation, the number of persons present at initiation, risky injection, and sexual behaviors at initiation, as well as behaviors after initiation, were examined. Overall, men and women were similar statistically with respect to age at initiation (19.5 years) and risk behaviors at initiation. While men were initiated by men (77%), women were more often initiated by women (65%), most of whom were friends (75%) or relatives (23%). The percentage of women infected with human immunodeficiency virus (HIV) was slightly greater than that of men, 17% versus 11% (P<.2), whether initiated by a man or a woman. Persons who self-initiated had a lower HIV prevalence and fewer HIV-related risk behaviors. Analysis of variance assessed differences in the HIV risk profiles of female and male IDUs who were intiated by someone of the same sex, of the opposite sex, or who self-initiated. These results indicated that (1) young women and men had similar patterns of injection initiation; (2) most women were initiated by female friends, runing counter to earlier literature claims that women were initated to injection drug use by male sex partners; and (3) women initiated by men had a marginally greater mean score on the HIV risk profile.     

Psychoactive drug use in school age adolescents, Brazil

To quantify psychoactive drug use and investigate use-related variables among students of Assis, Brazil, a questionnaire was administered to collect sociodemographic data and identify the pattern of non-medical use of psychoactive drugs in 20% of public and private school students. The largest consumption indexes for lifetime use were seen for alcohol (68.9%) and tobacco (22.7%). Drugs most often used were: solvents (10.0%); marijuana (6.6%); benzodiazepines (3.8%); amphetamines (2.6%); cocaine (1.6%); and anticholinergics (1.0%).     

Health education campaigns and drug use: the 'drug offensive' in Australia

In April 1986 the Australian federal government launched a massmedia drug education programme called the Drug Offensive aspart of its overall strategy to reduce drug abuse. The primarypurpose of the Offensive was to increase general knowledge aboutdrugs and to promote responsible drug use. Using data collectedin 1988 as part of a general evaluation of the National CampaignAgainst Drug Abuse, we show that there were high levels of generalawareness of the Drug Offensive within the Australian community.Multivariate analyses show that increased exposure to variouscomponents of the Drug Offensive, such as television commercials,written materials, and educational programmes, increased bothknowledge of the aims of the Offensive and perceived personaleffectiveness of the campaign. But the analyses also showedthat certain groups, in particular males and the young, wereless likely to have perceived the campaign as having been successfulfor them. Additionally, the negative associations between effectivenessand drug use suggest the Offensive may not be reaching a majortarget group—those at high risk of using drugs.     

Long-term outcome of chronic drug use: the Amsterdam Cohort Study among Drug Users

In the present study, mortality rates and prevalence of abstinence from illicit drugs among persons with a history of addiction to heroin, cocaine, and/or amphetamines were estimated along the drug-using career time scale. Follow-up data on drug use and vital status were analyzed for participants in the Amsterdam Cohort Study among Drug Users (n = 899; 1985-2002). Participants in the study were primarily recruited at low-threshold methadone outposts. It was estimated that at least 27% of drug users had died within 20 years after starting regular drug use; for half, death had been due to causes unrelated to human immunodeficiency virus. A favorable trend towards abstinence with increasing time since initiation of regular use was observed. However, among those alive, the estimated prevalence of abstinence for at least 4 months from the above drugs and methadone was only 27% at 20 years since initiation. A higher age at initiation, a calendar year of initiation before 1980, and a Western European ethnic origin were associated with higher prevalence of abstinence. These results indicate that the concept of "maturing out" to a drug-free state does not apply to the majority of drug users. Further studies on determinants of individual transitions in drug use are important in order to establish evidence-based intervention strategies.     

云南省陇川县男性青年吸毒危险因素分析

目的　探索边境地区男性青年吸毒的危险因素。方法　断面调查基础上建立回顾性队列,观察期为１９９１ 年１ 月１ 日至１９９４ 年８ 月１ 日。被调查对象人口学和行为方面资料采用匿名方法收集。危险因素的确定采用单因素和多因素分析方法。结果　每年新吸毒者发生率在１９９１ ～１９９３ 年间逐年上升。根据多因素分析,吸毒的危险因素包括：未婚、离婚或分居或丧偶（ Ｏ Ｒ＝ ８ ．９） 、被朋友或他人鼓励尝试毒品（ Ｏ Ｒ＝ ８ ．８） ,吸烟（ Ｏ Ｒ＝ ２ ．４） ,属景颇族（ Ｏ Ｒ＝ １ ．８） 以及１９９１ 年家庭成员中有人吸毒（ Ｏ Ｒ＝ １ ．５） 。至少上学７ 年是吸毒的保护因素（ Ｏ Ｒ＝ ０ ．６） 。几个主要危险因素的人群归因危险度分别是：被朋友或他人鼓励尝试吸毒为７０ ．８ ％ ,吸烟５０ ％ ,属景颇族为２４ ％ 。结论　采取社区干预来改变人们对吸烟及吸毒的看法,可能会大幅度降低新吸毒者发生率。为此,建议尽快开展社区干预项目。     

Improving drug use: a case study of events which led to changes in use of flucloxacillin in Australia

Policy makers and health professionals charged with implementing policies to improve medication use require knowledge as to how to integrate and co-ordinate strategies and interventions which have been shown to be effective. Experimental methodologies are commonly used to assess the effectiveness of interventions to improve medication use and while valuable for determining the effectiveness of particular interventions, they do not add to our understanding of how to co-ordinate and integrate multiple initiatives to improve medication use. We argue that analyses of the overall system of events which are implemented to improve medication use are also needed. In this paper, we demonstrate how the case study analysed within the framework of the Transtheoretical Model of behaviour change can be used to provide an understanding of the relationship of events which result in changes in medication use. A case study of the sequence of events which led to changes in the utilisation of flucloxacillin in Australia is assessed. The analysis demonstrated that the effectiveness of individual interventions was dependent upon the initiatives which were implemented concurrently and those that had been implemented previously. Changes in the utilisation of flucloxacillin resulted from regulatory interventions and the promotion of appropriate alternative therapies. The effectiveness of this change was enhanced by previous interventions which had raised awareness amongst health professionals of the adverse hepatic reaction associated with the use of flucloxacillin. This methodology adds to those currently employed to study methods of improving use of medications. It provides an understanding of the role of each initiative in the overall system. This is valuable for policy makers, providing them with information on how to co-ordinate and orchestrate the myriad of activities which support quality use of medicines.     

结直肠癌适宜筛查开始年龄的探讨

结直肠癌已成为严重威胁人类健康的重要公共卫生问题之一,筛查可以提升结直肠癌生存率并降低人群死亡率。多个国家相继发布适合本国人群的结直肠癌筛查指南,但不同指南在筛查年龄等问题上尚存争议。本文针对结直肠癌适宜筛查开始年龄进行汇总,分析其产生差异的原因,为我国人群结直肠癌筛查指南的制定提供思路借鉴。     

Population trends in antihypertensive drug use: results from the MONICA Augsburg Project 1984 to 1995.

Trends in antihypertensive drug use were assessed among 25- to 64-year-old participants of three independent surveys of the MONICA Augsburg region in 1984/85, 1989/90, and in 1994/95. Despite constant prevalences of hypertension, the percentage of hypertensives taking medication increased over the study period. The latter was mainly due to significant rises in antihypertensive monotherapy. By contrast, the use of combination treatments with two or more agents remained constant; however, although combinations composed of only two drugs were taken more often in 1995, those with three or more agents and fixed-dose preparations decreased substantially. Beta-blockers were most frequently, and with a rising tendency, taken as antihypertensive monotherapy. Newer drug classes like calcium channel blockers and ACE-inhibitors were introduced as monotherapy more hesitantly. Diuretics persisted as the basis of antihypertensive combination therapy. The use of combination therapies containing obsolete drugs, like reserpine, declined significantly with corresponding increases in drug combinations of, in particular, calcium channel blockers or ACE-inhibitors. We conclude that monotherapies account for most of the rising antihypertensive treatment rates and probably reflect intensified therapy of borderline hypertensives. The trends in antihypertensive drug classes and treatment regimens reflect a less rapid adoption of novel therapeutic concepts but a fairly close adherence to national and international guidelines.     

The effect of terminations of pregnancy for fetal abnormalities on trends in mortality to one year of age in Western Australia

Summary highlighted the contribution of birth defects. Over this time there has also been an increasing number of terminations of pregnancy for fetal abnormality. However, the effect of these terminations on mortality rates in Australia has not yet been estimated. The Western Australian Birth Defects Registry (BDR) records all birth defects that are diagnosed in stillbirths, livebirths and in pregnancies terminated because of a fetal abnormality. All cases on the BDR over the period 1980-98 were categorised into one of eight main birth defect groups and analysed in four time periods to show trends. Linkage provided information on deaths to one year of age, defined as perinatal plus postneonatal deaths. The proportion of terminations for fetal abnormality that would have resulted in a death before one year of age was estimated in two ways. The first method used the proportion of births with a birth defect in each diagnostic category that resulted in a death. The second method involved determination of likelihood of survival to one year of all terminations for fetal abnormality through independent review by two experts. Whilst mortality to one year of age for all birth defects has declined from 4.36/1000 births in 1980-84 to 2.75/1000 births in 1995-98, terminations of pregnancies for fetal abnormalities increased from 1.19/1000 births to 4.70/1000 births. After including the estimated mortality associated with terminations for fetal abnormality, the decline in mortality to one year of age associated with birth defects from 1980 to 1998 changed from a 37% reduction to a 15% reduction based on observed mortality 1980-84, and an 11% increase in mortality based on individual case review, highlighting the importance of considering terminations in mortality analyses.     

Crime, drugs and distress: patterns of drug use and harm among criminally involved injecting drug users in Australia

Objective: Explore demographic characteristics, patterns of drug use and psychological distress among regular injecting drug users (IDUs) in Australia, as a function of recent criminal activity.
Methods: Structured, face-to-face interviews with 909 regular IDUs recruited from every capital city in Australia, between June and August 2007, as part of the annual Illicit Drug Reporting System (IDRS). Criminal activity in the past month was assessed using the Opiate Treatment Index (OTI); psychological distress was assessed using the Kessler psychological distress scale (K10).
Results: Forty-three per cent of IDUs reported recent (past month) criminal activity. Those who had committed crime recently were younger, exhibited riskier patterns of drug use, reported more drug-related problems and were more likely to exhibit significant psychological distress. In a multivariate model the most important correlates of recent criminal activity were use of more than three drug types recently (OR=2.66, 95% CI 1.96-3.61), initiation to injecting before age 18 (OR=1.93, 95% CI 1.42-2.61) and daily drug injection (OR=1.55, 95% CI 1.13-2.13).
Conclusions and Implications: Criminal activity among regular IDUs in Australia is not restricted to a particular demographic group, and is a marker for riskier patterns of drug use, greater drug-related harm and psychological distress. Contact between IDUs and the criminal justice system provides opportunities for the delivery of targeted harm reduction messages, and for screening and diversion into appropriate treatment services.