Courtney E. Walls

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Previous studies have observed that television (TV) viewing is predictive of obesity and weight gain. We examined whether the cross-sectional association between TV viewing and BMI varied by racial/ethnic subgroups among young women in Wave III (collected in 2001-2002) of the National Longitudinal Study of Adolescent Health. We used multivariate linear(More)
OBJECTIVE To determine the effects of malnutrition on hemodynamic status of adolescents hospitalized for anorexia nervosa. DESIGN Longitudinal observational study. SETTING Tertiary care pediatric hospital. Patients Thirty-eight adolescents with anorexia nervosa, aged 13 to 21 years, with a mean (SD) body mass index (calculated as weight in kilograms(More)
PURPOSE To examine daily- and event-level associations of substance use with occurrence of sex and condom nonuse among depressed youth. METHODS Depressed, sexually active outpatients aged 15-22 years reported alcohol use, marijuana use, and sex on a personal digital assistant for 2 weeks. If they reported sex, participants indicated partner type and(More)
This study used momentary sampling to characterize marijuana events among young frequent users and determine contextual and individual predictors of use severity. Medical clinic outpatients aged 15-24 who used marijuana at least twice a week completed a baseline assessment, then used a handheld computer to report marijuana use at 4-6 signal-prompted times(More)
Our objective was to determine if sexual orientation groups differ in accuracy of BMI (kg/m(2)) calculated from self-reported height and weight and if weight status modifies possible differences. Using gender-stratified multiple linear regression to analyze Wave III of the National Longitudinal Study of Adolescent Health (n = 12,197), we examined the(More)
Food insecurity has been associated with weight status in children and adults although results have been mixed. We aimed to identify whether food insecurity was associated with BMI in young adults and whether this association differed by gender and was modified by food stamp use and the presence of children in the home. Cross-sectional data from wave 4(More)
We evaluated the feasibility, acceptability, and potential efficacy of MOMENT, an intervention to reduce youth marijuana use that combines brief motivational enhancement therapy with mobile self-monitoring and responsive messaging. At baseline, primary care patients ages 15-24 who used marijuana frequently (at least 3 times per week) completed a recall(More)
OBJECTIVES This study investigates how characteristics of young adolescents' screen media use are associated with their BMI. By examining relationships between BMI and both time spent using each of 3 screen media and level of attention allocated to use, we sought to contribute to the understanding of mechanisms linking media use and obesity. METHODS We(More)
Depressed young people may have sexual intercourse (sex) to regulate their disordered affective states. This study sought to determine how momentary positive and negative affect relate to subsequent sex events in depressed adolescents and young adults. Fifty-four outpatients (87% female) 15-22 years who reported clinically significant depressive symptoms(More)
Research on couples' sexual behaviors is limited because most studies collect data from only one person, rely on retrospective recall, and lack ecological validity. This study explored the feasibility of using momentary sampling (MS) methods to collect sex event data from both members of heterosexual young adult couples. Over two weeks, 40 participants (20(More)