Denise Dion Hallfors

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The purpose of this paper is to examine the effectiveness of Reconnecting Youth, a prevention program for at-risk high school youth. Data are from a large, independently evaluated effectiveness trial in two diverse urban school districts. A total of 1,218 students participated; 50% were male; average age was 15. We tested whether positive efficacy trial(More)
Individually randomized treatments are often administered within a group setting. As a consequence, outcomes for treated individuals may be correlated due to provider effects, common experiences within the group, and/or informal processes of socialization. In contrast, it is often reasonable to regard outcomes for control participants as independent, given(More)
To date, there has been relatively little work on gene-environment contributions to human sexuality, especially molecular analyses examining the potential contributions of specific polymorphisms in conjunction with life experiences. Using Wave III data from 717 heterozygous young adult sibling pairs included in the National Longitudinal Study of Adolescent(More)
OBJECTIVES The US Department of Education requires schools to choose substance abuse and violence prevention programs that meet standards of effectiveness. The Substance Abuse and Mental Health Services Agency certifies "model" programs that meet this standard. We compared findings from a large, multisite effectiveness trial of 1 model program to its(More)
OBJECTIVES We evaluated the feasibility of a population-based approach to preventing adolescent suicide. METHODS A total of 1323 students in 10 high schools completed the Suicide Risk Screen. Screening results, student follow-up, staff feedback, and school responses were assessed. RESULTS Overall, 29% of the participants were rated as at risk of(More)
Although many long-term care (LTC) programs assume that the disabilities of their frail elderly participants are stable in nature, there has been suggestive evidence to the contrary. This study tests stability of disability among social/health maintenance organization (S/HMO) members who were judged eligible for admission into a nursing home. Identified(More)
Self-report of sexual behavior among adolescents is notoriously inconsistent, yet such measures are commonly used as outcomes for human immunodeficiency virus (HIV) prevention intervention trials. There has been a growing interest in the use of HIV and other sexually transmitted disease biomarkers as more valid measures of intervention impact in high HIV(More)
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