Lisia von Diemen

Adaptation and construct validation of the Barratt Impulsiveness Scale (BIS 11) to Brazilian Portuguese for use in adolescents

OBJECTIVE Impulsivity is associated with different psychiatric disorders. The Barratt Impulsiveness Scale version 11 is one of the scales mostly used to measure impulsivity and it does not have a validated version for Brazilian Portuguese. The objective of this study is to adapt and conduct the construct validation of the Barratt Impulsiveness Scale version 11 for adolescents. METHOD The scale was translated and adapted into Portuguese and then back-translated into English. The psychometric proprieties, factor analysis and construct validity were evaluated in two samples: 18 bilingual undergraduate medical students and 464 male adolescents between 15 and 20 years old from a well-delimited geographical area in the city of Canoas, southern Brazil. RESULTS The adolescent sample had a mean age of 17.3 +/- 1.7 years. Intra-class correlation coefficient achieved a value of 0.90, and internal consistency had a of 0.62. Factor analysis did not identify the 3 factors of the original scale. Impulsivity scores from the Barratt Impulsiveness Scale version 11 had a correlation with scores for attention deficit/hyperactive disorder and oppositional defiant disorder and with number of symptoms of conduct disorder, suggesting an appropriate construct validity of the scale. CONCLUSION Even considering some limitations in the Portuguese version, Barratt Impulsiveness Scale version 11 can be used in male adolescents and should be tested in other populations.

Impulsivity, age of first alcohol use and substance use disorders among male adolescents: a population based case–control study

AIMS To evaluate the association between impulsivity, age of first alcohol consumption (AFD) and substance use disorders (SUD) in a non-clinical sample of adolescents. DESIGN AND SETTING Population-based case-control study of male adolescents between 15 and 20 years of age nested in a community survey in southern Brazil. PARTICIPANTS Cases were drug or alcohol abusers/dependents defined according to DSM-IV abuse/dependence criteria (n = 63). Individuals who had experienced alcohol use but where non-abusers served as controls (n = 355). Cases and controls completed a structured face-to-face interview. MEASUREMENTS The Mini International Neuropsychiatric Interview (MINI) was completed during the original survey and used to identify cases and controls. Impulsivity was measured by means of the Barratt Impulsivity Scale (BIS 11). Self-reported AFD and socio-demographic data were collected and analyzed through logistic regression according to a hierarchical model. FINDINGS Impulsivity and AFD were significantly associated with SUD. Both higher impulsivity [odds ratio (OR) 3.3, 95% confidence interval (CI) 1.4-7.8] and earlier AFD (OR 1.2, 95% CI 1.0-1.3) remained associated with SUD after model adjustments. CONCLUSIONS The findings from this population-based case-control study suggest that impulsivity and age of first alcoholic drink are associated strongly with alcohol and drug problems. Additionally, impulsivity seems to contribute to a premature exposure to alcohol by hastening the AFD. If the temporal effect of these associations is confirmed in longitudinal designs including broader population groups, our findings may contribute to the development of clinical and policy interventions aiming at reducing the incidence and morbidity associated with substance-related problems among adolescents.

Changing patterns of cocaine use and hiv risks in the south of Brazil.

Abstract For well over a decade, researchers in Porto Alegre, Brazil, have been documenting the extent of the AIDS epidemic in the region, with a specific focus on the linkages between drug use and HJV seropositivity. Virtually all of the studies conducted during those years found injection drug use (IDU) to be the major vector for HIV seropositivity in this population. However, recent research found that the number of IDUs had declined significantly. Qualitative interviews and focus groups suggested many reasons for this decline: (1) many had died, because they had never heard of AIDS or HIV, and were unaware of how HIV is transmitted. As a result, they had become infected through the sharing of injection paraphernalia. (2) The quality of street cocaine had declined, making injection difficult. (3) Because of a fear of AIDS, some shifted to the smoking of crack, which had become a newly availability commodity in the street culture. Within this context, this article describes the qualitative data describing the decline of cocaine injecting and the corresponding emergence of crack use in Porto Alegre, Brazil, and related HIV risks.

Childhood trauma, impulsivity, and executive functioning in crack cocaine users

BACKGROUND The use of crack cocaine is a major public health concern in Brazil and internationally. Recent data suggest that childhood trauma is associated with worse outcomes among cocaine users. This study had the objective of evaluating the relationship of childhood trauma with executive functioning and impulsivity in outpatients with crack cocaine use disorders. METHODS This is a cross-sectional study of 84 consecutive outpatients with a primary crack cocaine use disorder who sought treatment in Porto Alegre, Brazil. Childhood trauma was evaluated with the Childhood Trauma Questionnaire; executive functioning, with the Wisconsin Card Sorting Test; and impulsivity, with the Barratt Impulsivity Scale. RESULTS Childhood trauma was strongly associated with executive dysfunction and impulsivity, even when controlled for possible confounders. CONCLUSIONS Childhood trauma may be associated with executive dysfunction and impulsivity in crack cocaine users. The full impact of trauma needs to be further investigated in longitudinal studies.

Highly reported prevalence of drinking and driving in Brazil: data from the first representative household study

OBJECTIVE Brazil lacks information about driving under the influence of alcohol (DUI) originated from representative samples obtained from the general population. METHOD 333 subjects with a valid drivers license and drinking in the last 12 months were drawn from a multistaged sample of 2,346 adults from the first Brazilian Household Survey of Patterns of Alcohol Use. A multivariate analysis was conducted to understand the associations between risk factors and driving after drinking three or more drinks. RESULTS the overall DUI prevalence reported in the sample was 34.7% - 42.5% among males and 9.2% among females. Being male (OR = 6.0, 95% CI 2.9-12.6), having a previous DUI accident (OR = 7.9, 95% CI 2.5-24.9), binging in the last year (OR = 2.2, 95% CI 1.03-4.5) and having an unfavorable opinion towards policies (OR = 2.9, 95% CI 1.4-6.2) remained associated with heavy drinking and driving after model adjustments. DISCUSSION This was the first study evaluating driving under the influence of alcohol in a representative sample of the Brazilian population. The prevalence of DUI found is alarming, and possibly underestimated in the sample. Results demonstrate the need for more studies on this association and show directions towards preventive strategies for the specific high-risk group of male drivers with previous problems with alcohol and unfavorable opinions about prevention policies.

HIV seroprevalence among drug users: an analysis of selected variables based on 10 years of data collection in Porto Alegre, Brazil.

Data from five studies were pooled to describe associations between drug use and HIV. The Risk Assessment. Battery in Porto Alegre, Brazil, was used to collect data from 1449 subjects in 5 separate studies conducted between 1995 and 2004. The subjects were divided into categories based on their pattern of drug use: (1) injection drug users (IDUs), (2) crack smokers, (3) frequent drug users, and (4) infrequent cocaine/alcohol/marijuana users. The sample consisted primarily of young males with low education and income levels. Half of the subjects reported frequent condom use, and exchanges involving drugs, sex, and money were infrequent (although more common in groups 1 and 2). The overall seroprevalence was 20.6%, and the prevalence was different across the four groups, showing a linear decrease from group 1 (57.1%) to group 4 (11.7%). The IDU and crack-smoking groups showed similarities in their risk levels when compared with the other two groups, and individuals in group 1, 2, and 3 were more likely to report having had four or more sex partners. After controlling for all other risk factors, IDU, males having sex with males, and crack use were highly associated with HIV (OR 7.30, 95% CI: 5.10.10.40; OR 3.04, 95%CI: 1.89,4.80; OR 2.03, 95%CI: 1.40, 2.92, respectively). The findings confirm that poverty, low education, and IDU remain risk factors for HIV in Porto Alegre, Brazil, and the study identities crack smoking as a new risk factor.

Preliminary Estimates of Human Immunodeficiency Virus Prevalence and Incidence Among Cocaine Abusers of Porto Alegre, Brazil

A sample of 193 southern Brazilian inner-city cocaine abusers was studied to assess the prevalence of human immunodeficiency virus (HIV) infection. Following the exclusion of those who were seropositive from the intake sample, a cohort of 138 HIV-negative cocaine abusers was followed for 18 months to assess seroincidence rates and the associated characteristics. HIV status, drug use, sexual risk behaviors, and presence and severity of medical and psychiatric symptoms were collected at intake using a Brazilian version of the Risk Assessment Battery, the Addiction Severity Index (ASI), Symptom Check List-90 (SCL-90), and Beck Depression Inventory (BDI): this was repeated at 6-, 12-, and 18-month intervals. The overall seroprevalence was 28,5%, and the variables associated with HIV seropositivity were age older than 25 years, being single, having less than 8 years of education, and having injected cocaine at least once. Although follow-up procedures were difficult to implement due to sample characteristics, we obtained data from 82,6% of the participants for at least one follow-up and for 57% at all follow-up windows. Most participants showed high scores on the Beck Depression Inventory (mean of 20.6±13.9) and Symptom Check List-90 (mean of 106.4±91.9). There were 8 seroconversions in the 18-month period, yielding an incidence rate of 5.03/100 (confidence interval [CI] 2.2–9.7) person-years at risk. None of the seroconverters reported recent cocaine injection, and only 14.5% of the overall sample reported ever injecting cocaine, which suggests that another significant mode of transmission via sexual behavior should be considered as well. Each of these findings has important implications for the design of preventive interventions.

Factors associated with alcohol and drug use among traffic crash victims in southern Brazil

OBJECTIVE To investigate the prevalence of and factors associated with alcohol- or drug-related traffic crashes (TC) in a sample of TC victims who were admitted to the two emergency rooms of Porto Alegre in southern Brazil. METHODS A cross-sectional study with consecutive samples was used. Victims of non-fatal TCs (as drivers, passengers or pedestrians) who had presented at emergency rooms during the 45 days of data collection were selected. Subjects participated in a structured interview, were breathalyzed and underwent salivary drug testing. A multinomial logistic regression model was used to verify factors associated with alcohol or drug use. RESULTS Of the 609 victims who participated in the interview, 72% were male, and the median age was 29 years (interquartile range 23.0-40.0 years). The drivers were mostly men (p<0.001), with a higher binge drinking rate (p=0.003) and marijuana use (p=0.005) than seen in pedestrian and passengers. The prevalence of a positive blood alcohol concentration (BAC) ranged from 7.8% among the drivers to 9.2% among the pedestrians (p=0.861), and the cannabis prevalence was 13.3% among the drivers. The variables associated with an alcohol-related accident were binge drinking in the prior 12 months (OR 2.4; CI 95% 1.1-5.1) and coming from a party/bar (OR 8.7; CI 95% 2.8-26.7). Alcohol abuse or dependence increased by 5.2-fold the chance of another substance-related TC. CONCLUSION The large number of individuals found in TC-related emergency room visits in a short time frame is evidence of the Brazilian epidemic of TC. The data showed that alcohol abuse or dependence also increases the risk of intoxication by other drugs, and they point to alcohol and drug use as a major problem requiring specific TC-related public policies and law enforcement.

Peripheral toxicity in crack cocaine use disorders

A growing body of evidence suggests that crack cocaine misuse has widespread systemic and cognitive consequences, but little attention has been given to its systemic pathophysiology. We report here changes in inflammation markers, oxidative damage and brain derived neurotrophic factor in a sample of outpatients with crack cocaine use disorders. Fifty-three outpatients were recruited for this cross-sectional study and matched with fifty control subjects. The focus of this report is in between group differences in cytokines, oxidative damage and brain-derived neurotrophic factor (BDNF). Crack cocaine use was associated with higher BDNF levels when compared to controls, present only in those who used crack cocaine in the last month. Patients also had higher circulating levels of IL-1β, TNF-α and IL-10 when compared to controls. There were no significant differences in oxidative damage between patients and controls. These results represent a first demonstration that crack cocaine use disorders entail an activation of the reward, immune and inflammatory systems.

Psicodinâmica do adolescente envolvido com drogas

Drug abuse amongst adolescents is becoming increasingly prevalent placing serious consequences in their development and their relationship with family and society. The present paper discloses some epidemiological data on protectors and risk factors for drug abuse in this population demonstrating that personal and family stressors during early life are associated with drug abuse. On the other hand, engaged parents, personal motivation and constant monitoring are associated with avoidance of drugs. Major prospective studies in this field are also reviewed. Psychodynamic theories related to addiction and their evolution through the thoughts of authors such as H. Kohut, J. McDougall, H. Rosenfeld, C. Olievenstein, Khantzian, are analyzed. The application of the thecnics based on psychoanalytic psychotherapy in chemical dependents is also discussed.