Biomedical subjects

Karl G Hill

Publications and source records attributed to Karl G Hill.

10 recordsLinked to original sources

PubMed2006

Linking substance use and problem behavior across three generations.

This study examined patterns of between-generation continuity in substance use from generation 1 (G1) parents to generation 2 (G2) adolescents and from G2 adult substance use and G1 substance use to generation 3 (G3) problem behavior in childhood. Structural equation modeling of prospective, longitudinal data from 808 participants, their parents, and their children showed low levels of G1 to G2 cross-generational continuity in the general tendency to use drugs. This effect was fully mediated by G2 early adolescent behavior problems. Drug-specific residual effects were observed across generations for cigarette smoking. Once established in adolescence, substance use in G2 showed stability over time. G2 substance use at age 27 significantly predicted G3 problem behavior. G1 substance use also was related to G3 problem behavior indirectly. These findings highlight the importance of interrupting intergenerational cycles of substance use and problem behavior.

Adolescent↗

PubMed2006

Developmental trajectories of family management and risk for violent behavior in adolescence.

PURPOSE: To address two questions: (1) Can groups of family management trajectories be identified in early adolescence? (2) How are the different family management trajectories related to trajectories of violent offending for youths aged 13-18 years? METHODS: Analyses used semi-parametric group-based modeling (SGM) to identify groups of family management trajectories. A joint trajectory method was used to predict patterns of youth violence conditional on family management. RESULTS: Analyses identified 3 trajectories of family management from age 11 to 14: (1) stable low, (2) stable high, and (3) increasing family management. Youths from families in the low family management trajectory were more likely than others to follow chronic and late increasing trajectories of violence. In contrast, youths in stable-high positive family management were less likely to engage in violence from age 13 to age 18. Further, youths whose families started low, but increased to high family management, had patterns of adolescent violence similar to those whose parents were consistently high in their use of good parenting practices. CONCLUSIONS: The current study advances knowledge of developmental patterns in family management and youth violence. Although most parents remained stable in family management practices from age 11 to 14 (stable high or stable low), parents who started low, but improved their management practices during middle school, had children with lower levels of chronic and late increasing violence than those who remained low. Findings suggest that interventions developed to enhance family management practices may reduce risk for violence in later adolescence.

Adolescent↗

PubMed2006

Childhood bullying involvement and exposure to intimate partner violence.

OBJECTIVE: Our objectives with this study were to describe the prevalence of bullying involvement (ie, bullying and victimization) among children from a multigenerational study and to examine the relationship of these childhood behaviors and exposure to intimate partner violence. METHODS: A community-based cohort of 112 children (aged 6 to 13 years) was asked to self-report on physical, verbal, and relational types of bullying and victimization experienced in the past year. Parents reported on their child's externalizing and internalizing behaviors during the previous 6 months using items from Achenbach's Child Behavior Checklist. The frequency of parental experiences of intimate partner violence perpetration and victimization at 2 time points during the preceding 5 years was measured using Conflict Tactics Scale items. The association of intimate partner violence and parent-reported child behavioral problems was examined, followed by exposure to intimate partner violence and child-reported bullying or victimization. Parental risk factors (eg, race/ethnicity, education, problem drinking) that predispose to intimate partner violence were controlled for using propensity score statistical modeling. RESULTS: Eighty-two (73.2%) children reported being victimized by peers, and 38 (33.9%) children reported bullying behaviors in the past year. More reports came from girls than from boys (55% for victimization and 61% for bullying). Almost all (97%) child bullies were also victims themselves. Intimate partner violence was reported by parent respondents in 53 (50.5%) households at any or both of the 2 time points. Exposure to intimate partner violence was not associated with child-reported relational bullying behaviors or victimization by peers, However, intimate partner violence-exposed children were at increased risk for problematic levels of externalizing behavior/physical aggression and internalizing behaviors. CONCLUSIONS: In our sample, children who were 6 to 13 years of age reported a substantial amount of bullying and victimization; a large majority were bully-victims and female. Regression analyses did not show that children who were exposed to intimate partner violence were more likely to engage in relational bullying. However, children who are exposed to intimate partner violence have a higher likelihood of internalizing behaviors and physical aggression.

Adolescent↗

PubMed2005

Promoting positive adult functioning through social development intervention in childhood: long-term effects from the Seattle Social Development Project.

OBJECTIVE: To examine the long-term effects of the Seattle Social Development Project intervention in promoting positive adult functioning and preventing mental health problems, crime, and substance use (including tobacco, alcohol, and other drugs) at 21 years of age. DESIGN: This nonrandomized controlled trial followed up participants to 21 years of age, 9 years after the intervention ended. We compared the following 3 intervention conditions: a full 6-year intervention (grades 1 through 6); a late 2-year intervention (grades 5 and 6 only); and a no-treatment control condition. SETTING: Eighteen public elementary schools serving diverse neighborhoods, including high-crime neighborhoods, of Seattle, Wash. PARTICIPANTS: A sex-balanced, multiethnic sample of 605 participants across the 3 conditions who completed interviews at 21 years of age (94% of the original sample in these conditions). INTERVENTIONS: Teacher training in classroom instruction and management, child social and emotional skill development, and parent training. MAIN OUTCOME MEASURES: Self-reports of functioning in school and work, emotional and mental health, and crime and substance use at 21 years of age and official court records. RESULTS: Broad significant effects on functioning in school and work and on emotional and mental health were found. Fewer significant effects on crime and substance use were found at 21 years of age. Most outcomes had a consistent dose effect, with the strongest effects in subjects in the full-intervention group and effects in the late-intervention group between those in the full-intervention and control groups. CONCLUSIONS: A theory-guided preventive intervention that strengthened teaching and parenting practices and taught children interpersonal skills during the elementary grades had wide-ranging beneficial effects on functioning in early adulthood.

Adolescent↗

PubMed2005

Measures of positive adult behavior and their relationship to crime and substance use.

Drawing on diverse approaches to the study of youth development and adult functioning, as well as social capital and citizenship, this investigation identifies measures of positive adult behavior. Although prevention researchers study protective factors, as well as risk factors, for problem behaviors and other negative outcomes, less attention is given to positive behavior outcomes and there is little understanding of the relationships between positive and negative outcomes. Analyses included 765 participants from the Seattle Social Development Project interviewed at age 21. Seven measures of positive adult behavior were identified: volunteerism, group involvement, neighborliness, interpersonal connection, constructive engagement, financial responsibility, and honesty. Measures related to distal social relationships (group involvement and neighborliness) had relatively weak associations with crime and substance use. In contrast, the measures of constructive engagement, financial responsibility, and honesty had significant negative associations with multiple measures of crime and substance use. Results indicate that the seven measures provide relatively independent variables useful for assessing positive adult behavior. These measures can be used to assess positive outcomes in adulthood of intervention studies, or to assess the prevalence of positive adult behavior in different populations or groups.

Adult↗

PubMed2005

Family influences on the risk of daily smoking initiation.

PURPOSE: To examine developmental patterns and family influences on the risk of daily smoking initiation from adolescence to young adulthood. METHOD: A gender-balanced, ethnically diverse urban sample of 808 children aged 10-11 years was surveyed in 1985 and followed prospectively to age 21 in 1996. Discrete-time survival analysis was used to assess the hazard of initiation of daily smoking during this time period, as well as the effects of family factors on the risk of daily smoking initiation. RESULTS: Less parental smoking, more strict family monitoring and rules, and stronger family bonding predicted a significantly lower risk of daily smoking initiation controlling for socio-demographic background. The decline in the impact of family bonding over time was marginally significant; however, none of the interactions between family factors and time were significant, indicating generally consistent family influences on daily smoking from age 10 to 21. CONCLUSIONS: The present findings indicate that parent smoking contributes to the onset of daily smoking in their teenagers even if parents practice good family management, hold norms against teen tobacco use, and do not involve their children in their own tobacco use. Smoking prevention programs should include components focused on parents of adolescents. To reduce risks for daily smoking among adolescents, it is important to encourage parents to stop or reduce their own smoking. In addition, these data indicate that parents can reduce their children's risk of daily smoking initiation by reducing family conflict, by maintaining strong bonds with their children, by setting clear rules, and by closely monitoring their children's behaviors.

Adolescent↗

PubMed2004

Adolescent heavy episodic drinking trajectories and health in young adulthood.

OBJECTIVE: This study examined the association of trajectories of heavy episodic drinking (at least five alcoholic drinks on one occasion) during adolescence with health status and practices at age 24. METHOD: Semiparametric group-based modeling and logistic regressions were used to analyze data from a longitudinal panel of 808 youths interviewed between 10 and 24 years of age. RESULTS: Four distinct trajectories of adolescent heavy episodic drinking were identified: nonheavy drinkers, late onsetters, escalators and chronic heavy drinkers. Overall, young adults who did not engage in heavy episodic drinking during adolescence had the lowest occurrence of health problems and were most likely to engage in safe health behaviors at age 24. Chronic and late-onset heavy episodic drinking during adolescence had negative effects on health status and practices at age 24. Adolescent chronic heavy drinkers were more likely to be overweight or obese and to have high blood pressure at age 24 than those who did not drink heavily in adolescence. Late-onset heavy drinkers were less likely to engage in safe driving practices at age 24 and were more likely to have been ill in the past year than adolescents who did not drink heavily. These health disparities remained even after current frequency of heavy episodic drinking at age 24, other adolescent drug use, ethnicity, gender and family poverty were controlled. CONCLUSIONS: Heavy episodic alcohol use during adolescence has long-term, negative health consequences. Distinct patterns of adolescent heavy drinking affect health status and practices in young adulthood differently.

Adolescent↗

PubMed2003

Predictive, concurrent, prospective and retrospective validity of self-reported delinquency.

BACKGROUND: The self-report method is widely used to measure offending. Previous studies suggest that it is generally valid, but that its validity may be lower for blacks than for whites. AIM To assess the validity of self-reported offending in relation to court referrals, and to investigate how it varies with types of offences, sex and race. METHOD: Annual court and self-report data were collected between ages 11 and 17 for eight offences in the Seattle Social Development Project, which is a prospective longitudinal survey of 808 youths. RESULTS: Self-reports predicted future court referrals. Predictive validity was highest for drug offences, for males and for whites, and lowest for females and Asians. The probability of youths with a court referral reporting offences and arrests was highest for drug offences, for males, for whites and for blacks. Retrospective ages of onset agreed best with prospective ages for drug offences, Asians and whites. More Asians than blacks or whites failed retrospectively to report offences that had been reported prospectively. CONCLUSIONS: The validity of self-reports of offending was high, especially for drug offences, for males and for whites. Contrary to prior research, validity was high for black males. It was lowest for Asian females. Sex and race differences in validity held up after controlling for socioeconomic status. Differential validity probability did not reflect police bias.

Adolescent↗

PubMed2002

Developmental relationships between adolescent substance use and risky sexual behavior in young adulthood.

PURPOSE: To examine the developmental relationship between adolescent substance use and risky sexual behavior in young adulthood. A gender-balanced, ethnically diverse urban sample of 808 children in Seattle was surveyed at age 10 years in 1985 and followed prospectively to age 21 years in 1996. Semiparametric group-based modeling was used to determine trajectory groups of binge-drinking, cigarette smoking, marijuana use, and the use of other illicit drugs. Negative binomial regressions and logistic regressions were used to examine whether these trajectory groups predicted the number of sex partners and condom use at age 21 years. Specific forms of adolescent substance use significantly predicted risky sexual behavior at age 21 years, after other substance use and early measures of sexual behavior were controlled. Early binge-drinkers had significantly more sex partners than nonbinge-drinkers. Late onset binge-drinkers and marijuana users had significantly more sex partners and were less likely to use condoms consistently than those who did not binge drink or use marijuana. Experimenters in cigarette smoking, who did not escalate smoking, were more likely to use condoms consistently than nonsmokers. In contrast, the use of other illicit drugs in adolescence did not predict risky sexual behavior at age 21 years. The effects of adolescent substance use on risky sexual behavior at age 21 years differed for youths with developmentally different substance use trajectories in this urban sample disproportionately drawn from high crime neighborhoods. To prevent risky sexual behavior among young adults, attention should be paid to binge-drinking and marijuana use during adolescence.

Adolescent↗

PubMed2002

A developmental analysis of sociodemographic, family, and peer effects on adolescent illicit drug initiation.

OBJECTIVE: To examine the effects of sociodemographic, family, and peer predictors on the developmental patterns of illicit drug initiation from ages 12 to 21 years. METHOD: A gender-balanced, ethnically diverse urban sample of 808 children in Seattle was surveyed at age 10 in 1985 and followed prospectively to age 21 in 1996. Discrete-time survival analysis was used to assess the effects of sociodemographic, family, and peer factors on the risk of initiation. RESULTS: The risk for initiating illicit drug use increased steadily from ages 12 to 21. High family conflict, low family bonding, and high peers' antisocial activities predicted higher risk of initiation across this developmental period. The effect of family bonding began to decline after age 18, while the effect of peers' antisocial activities began to increase after age 15. Few gender and ethnic differences were found. CONCLUSIONS: Prevention programs need to include family and peer factors as important targets. Parents should create a warm and supportive family environment with appropriate supervision and control throughout adolescence. Association with antisocial peers should be reduced, especially in high school. Interventions addressing these family and peer factors should have beneficial effects across gender and ethnic groups.

Adolescent↗