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Biomedical subjects

D W Brook

Publications and source records attributed to D W Brook.

At least 19 recordsLinked to original sources
PubMed1999

The role of parents in protecting Colombian adolescents from delinquency and marijuana use.

OBJECTIVES: To identify general and differentiating risk and protective factors from domains of culture and ecology, peer, family, and personality, related to adolescent delinquency and marijuana use, and to study the protective role of the parent-child mutual attachment in offsetting cultural and ecological risk factors, leading to less delinquency and marijuana use. DESIGN: Cross-sectional analyses of interview data collected in Colombia. PARTICIPANTS: A total of 2837 Colombian adolescents, 12 to 17 years of age. SETTING: Adolescents were interviewed in their homes. MAIN MEASURES: Independent variables included measures from 4 domains: culture and ecology, peer, family, and personality. The dependent variables were delinquency and marijuana use. RESULTS: Several risk factors, such as tolerance of deviance and sensation seeking, were similarly related to both delinquency and marijuana use, suggesting that a common cause underlies the propensity to engage in different deviant behaviors. Some risk factors were more involved in delinquency and other risk factors were more highly related to the adolescent's marijuana use. Finally, when violence is endemic and illegal drugs are readily available, a close parent-child bond was capable of mitigating these risk factors, leading to less marijuana use and delinquency. CONCLUSIONS: The findings have implications for public health policy related to interventions in countries in which violence and drug use are prevalent. The results point to interventional procedures aimed at adolescents vulnerable to marijuana use and delinquency as well as efforts aimed at specific vulnerabilities in these areas. For example, reducing the risk factors and enhancing the protective factors for marijuana use and delinquency may result in less adolescent marijuana use and delinquency.

Adolescent↗
PubMed1998

Longitudinal study of co-occurring psychiatric disorders and substance use.

OBJECTIVE: To examine temporal priority in the relationship between psychiatric disorders and drug use. METHOD: Psychiatric assessments and drug use were completed at three different points in time, spanning 9 years. Structured interviews were administered to a cohort of youths and their mothers. Subjects were selected on the basis of their residence in either of two counties in upstate New York. The sample was predominantly white male and female youths, aged 1 through 10 years upon initial collection of data. Psychiatric diagnoses were assessed by a supplemented version of the Diagnostic Interview Schedule for Children Version 1, using computer algorithms designed to match DSM-III-R criteria to combine information from mothers and youths. Substance use information was obtained in the interviews. RESULTS: A significant relationship was found to exist between earlier adolescent drug use and later depressive and disruptive disorders in young adulthood, controlling for earlier psychiatric disorders. Earlier psychiatric disorders did not predict changes in young adult drug use. CONCLUSIONS: Implications for policy, prevention, and treatment include (1) more medical attention needs to be given to the use of legal and illegal drugs; and (2) a decrease in drug use may result in a decrease in the incidence of later psychiatric disorders.

Adolescent↗
PubMed1998

Drug use among African Americans: ethnic identity as a protective factor.

This study examined the multiple components of ethnic identity, the place of this ethnic identity set in the mediational model of the path to drug use predicted by our family interactional framework, and the protective role of each component of ethnic identity. The participants were 259 male and 368 female African Americans in late adolescence. They responded to a structured questionnaire in individual interviews. We found that few of the specific components of ethnic identity were significantly related as main effects to drug use. Most of the effect of ethnic identity was mediated by the family set of variables. Each of the components of ethnic identity offset risks or enhanced protective factors from the ecology, family, personality, and peer domains, thereby lessening drug use. This pattern highlights the importance of incorporating ethnic identity into drug prevention programs which serve African-American youth.

Adolescent↗
PubMed1998

Psychosocial risk and protective factors for condom use among female injection drug users.

The authors examined the influences of domains of psychosocial risk and protective factors on male-partner condom use in a cobort of 209 female HIV-positive (HIV+) and HIV-negative (HIV-) injection drug users (IDUs) by use of a cross-sectional, retrospective design. Information collected from a structured questionnaire included data on psychosocial risk and protective factors in the personality, family, and peer domains; HIV status; and condom use. Among HIV+ IDUs, personality risk factors (e.g., unconventionality), family (e.g., low maternal identification), and peer factors were related to less male-partner condom use. Resources and condom availability were associated with greater male condom use with both HIV+ and HIV- IDUs. The psychosocial domains affected male condom use with both HIV+ and HIV- female IDU patients via two different mediational models. The findings suggest the need to use specific psychosocial interventions for risky sexual behavior among HIV+ and HIV- female IDUs.

Adolescent↗
PubMed1998

Pathways to marijuana use among adolescents: cultural/ecological, family, peer, and personality influences.

OBJECTIVE: To examine the linkages, cultural/ecological factors, and major psychosocial risk factors as they relate to drug use in a sample from Colombia, South America. METHOD: The participants were 1.687 adolescents living in mixed urban-rural communities in Colombia, South America. An individual interview was administered to youths in their homes by Colombian interviewers. The scales used were based on item intercorrelations grouped into the following risk categories: (1) adolescent personality, (2) family traits, (3) peer factors, and (4) cultural/ecological variables. RESULTS: Pearson correlations were computed for each variable and the frequency of marijuana use. Results show that each of the domains was related to adolescent marijuana use, with some notable gender differences. As regards the interrelation of domains, a mediational model was operative. CONCLUSIONS: Findings support a family interactional theory. The domains of family, personality, and peer factors had a direct effect on the adolescents' marijuana use. Implications for prevention are also addressed.

Adolescent↗
PubMed1997

Young adults' drug use: a 17-year longitudinal inquiry of antecedents.

This longitudinal study examined the interrelation of personality and peer factors on young adults' drug use and also the influence of the interaction of personality and peer factors on drug use. The sample of 756 males and females were interviewed four times between the M ages of 6 and 22. Personality attributes in childhood were related to peer factors in early adolescence which, in turn, were related to personality traits in later adolescence. These traits were linked with selection of peers and, ultimately, drug use in young adulthood. Additionally, the adolescent and young adult domains had direct effects on young adults' drug use. Significant interactions indicated that a few protective childhood personality traits buffer the risk of deviant peers in adolescence on young adults' drug use. More earlier protective characteristics from one domain enhanced the effect of later protective traits from the other domain.

Adolescent↗
PubMed1997

Coping with AIDS. A longitudinal study.

The goals of this longitudinal, prospective study were to 1) examine coping strategies of HIV-positive (HIV+) and HIV-negative (HIV-) injecting drug users; 2) study the relationship of earlier social support to later coping in HIV+ men; and 3) examine the effects of earlier coping strategies on later psychosocial function. The authors studied 287 men given a structured questionnaire at two points in time. HIV+ subjects scored higher than HIV- subjects on measures of AIDS-related adaptive coping (social support) and AIDS-related maladaptive coping (aggression), but not on general coping. General coping was not specifically AIDS-related, but was correlated positively with adaptive coping and negatively with maladaptive coping. These results suggest that earlier general coping is related to the later avoidance of maladaptive coping, and they have specific implications for teaching preventive strategies. AIDS-related adaptive or maladaptive coping techniques may be used simultaneously, and coping behavior may change over time. Earlier social support is related positively to aspects of later coping in HIV+ men.

Acquired Immunodeficiency Syndrome↗
PubMed1997

Psychosocial risk factors for HIV transmission in female drug abusers.

The authors studied the influences of domains of psychosocial risk factors on needle-sharing with familiar people and with strangers in a cohort of female injecting drug users (IDUs). Subjects were 119 female IDUs, 46% of whom were HIV+. Subjects were given individually administered questionnaire interviews: Using Pearson correlation coefficients and multiple hierarchical regression analyses, the authors found that personality, family, and peer attributes related to needle-sharing in women were similar to those found in men, with certain exceptions. The role of the family, particularly the Significant Other, was more important and proximal in its effect on needle-sharing behavior in women than in men. There was a main effect as well as a mediating effect of family in women, buffering risk factors leading to needle-sharing.

Adult↗
PubMed1994

Coping with AIDS and the threat of AIDS in intravenous drug abusers.

In this investigation of patterns of coping with AIDS or the threat of AIDS by male intravenous drug abusers (both HIV positive and HIV negative), psychosocial measures were used to study the effects of personality factors and social support. Correlational analyses and multiple hierarchical regression analyses were used to assess the results. The pathways by which psychosocial factors affected coping differed in HIV-positive and HIV-negative subjects. A mediational model best depicted the interrelation of personality, family, and peer factors among HIV-positive subjects. Anger and rebelliousness interfered with coping among HIV-negative subjects, but not among HIV-positive subjects. This cross-sectional study provides insight into the interplay of inner personality factors and external support factors and their effects on coping ability in male intravenous drug abusers. Differences between those with HIV and those at risk for HIV infection are discussed.

Acquired Immunodeficiency Syndrome↗
PubMed1993

Psychosocial risk factors for HIV transmission in male drug abusers.

We studied the psychosocial risk factors associated with Black, Hispanic, and White (N = 257) male intravenous drug abusers' needle-sharing behavior with familiar individuals and with strangers. Approximately half the subjects were HIV+. The findings supported a mediational model in that risk factors in the family domain were associated with peer and personality risk factors conducive to needle sharing that, in turn, were related to needle-sharing behavior.

Adult↗
PubMed1991

Sibling influences on adolescent drug use: older brothers on younger brothers.

This study was designed to examine sibling influences on adolescent drug use. The sample was composed of 278 white, predominantly middle-class male college students and their oldest brothers. Self-administered questionnaires were taken separately by the students and their brothers. The findings indicated that the oldest brother's personality and the sibling relationship had an influence on the younger brother's drug use. Three hypothesized mechanisms that supported the findings, the Personality Influence Mechanism, the Genetic Temperament Connection, and the Environmental Reactive Mechanism were discussed.

Adolescent↗
PubMed1990

The role of older brothers in younger brothers' drug use viewed in the context of parent and peer influences.

The purpose of this study was to examine the impact of an older brother's drug use on his younger brother's drug use viewed in the context of parent and peer influences. The sample consisted of 278 White, middle-class male college students and their oldest brothers, who were given questionnaires assessing drug behavior. Results indicated that older brother, parental, and peer drug use each had an independent impact on younger brother's use. The degree of influence varied, with drug modeling by peers and older brothers having a stronger association with younger brother drug use than did parental drug modeling. Further, the older brother's advocacy of drugs was associated with his younger brother's use even if the older brother did not serve as a drug model. Similarly, older brother drug modeling was of importance even if he did not advocate use. Finally, interactive results suggested that older brothers who did not use drugs could offset the negative effects of parental drug risks on younger brother use. Also, younger brothers were least likely to use drugs if both older brothers and peers served as models for nonuse.

Adolescent↗
PubMed1990

The psychosocial etiology of adolescent drug use: a family interactional approach.

The purpose of this monograph was to propose a framework, family interactional theory, for explaining the psychosocial aspects of adolescent drug use. Three themes are stressed: (a) the extension of developmental perspectives on drug use, (b) the elucidation of family (especially parental) influences leading to drug use, and (c) the exploration of factors that increase or mitigate adolescents' vulnerability to drug use. We present a developmental model with two components; the first deals with adolescent pathways to drug use, and the second incorporates childhood factors. The model was tested in two studies: one cross-sectional study of 649 college students and their fathers, and one longitudinal study of 429 children and their mothers. The subjects were given self-administered questionnaires containing scales measuring the personality, family, and peer variables outlined in the model. The results of each study supported the hypothesized model, with some differences between parental influences. We also found that individual protective factors (e.g., adolescent conventionality, parent-child attachment) could offset risk factors (e.g., peer drug use) and enhance other protective factors, resulting in less adolescent marijuana use. Implications of the findings for prevention and treatment, future research, and public policy are discussed.

Adolescent↗
PubMed1989

The consequences of marijuana use on intrapersonal and interpersonal functioning in black and white adolescents.

We examined the effects of marijuana use on adolescent personality, attitudinal, and behavioral attributes, perceived parent-adolescent relations, and perceived peer factors. Volunteer high school students (292 Blacks, 401 Whites) of middle-class backgrounds filled out questionnaires in their classrooms first when they were in the 9th and 10th grades and again 2 years later when they were in the 11th and 12th grades. Results suggest that regular use of marijuana may lead to lower achievement, increased tolerance of deviance, and more deviant behavior, and greater rebelliousness. Regular use also appears to interfere with adolescents' relationships with their parents and to lead them to associate with more deviant and drug-using friends. The consequences of marijuana use for intrapersonal and interpersonal functioning were for the most part similar in the different sex and age groups, although there were some ethnic differences.

Adolescent↗
PubMed1988

Depressive mood in female college students: father-daughter interactional patterns.

The interrelationship of sets of father and daughter factors in explaining depressive mood in normal female adolescents was examined. Separate questionnaires were given to 403 college students and their fathers. A mediational model was found, in which two sets of paternal variables were related to the daughter personality set, which in turn was related to her depressive mood. In addition, protective personality attributes of the daughter served both to offset the impact of paternal risk factors and to further strengthen paternal protective factors to reduce frequency of depressive mood. Comparisons are made with an earlier study of sons' depressive mood (Brook, Brook, Whiteman, & Gordon, 1983).

Achievement↗
PubMed1987

Fathers and daughters: their relationship and personality characteristics associated with the daughter's smoking behavior.

This study examined the interrelationships of domains (i.e., sets) of paternal personality and father-daughter relationship variables and daughter characteristics and their impact on the daughter's smoking. In addition, the interactive effects of individual father and daughter variables on the daughter's smoking were studied. Female college student volunteers (N = 403) and their fathers were given closed-ended questionnaires that included a number of scales assessing father and daughter characteristics. Results indicated that the domains of father and daughter variables each had a direct impact on the daughter's smoking (an independent model). Interactive findings revealed that daughter protective factors (those conducive to her not smoking) could offset the negative impact of paternal risk factors (those conducive to her smoking), and that, to a lesser extent, daughter protective factors further enhanced the positive effect of father protective variables.

Adult↗
PubMed1986

Onset of adolescent drinking: a longitudinal study of intrapersonal and interpersonal antecedents.

This study investigated several models for exploring the interrelationships of domains of personality, peer, and family factors and their effect on initiation into alcohol use. Three hundred eighteen black and white high school students were administered questionnaires when they were in the ninth and tenth grades (T1) and again two years later when the students were in the eleventh and twelfth grades (T2). Only those students who had never used alcohol at T1 were included in this study. The results supported an independent model: Each of the domains of T1 personality, peer, and family factors, with control on the other domains, had a direct effect on T2 initiation into alcohol use. The interactions of peer variables with personality and family variables were examined. The findings indicated that risk factors stemming from the peer group were ameliorated by protective personality and family factors.

Adolescent↗