Cockroach exposure and perceived stress interact to predict clinical outcomes in childhood asthma.

BACKGROUND: Nonpharmacologic interventions for asthma management rely on identification and mitigation of important asthma triggers. Cockroach exposure is strongly associated with asthma morbidity. It is also associated with stress, another risk factor for asthma. Despite high prevalence of both in vulnerable populations, the impact of joint exposure has not been examined. METHODS: Participants included 173 children with asthma in New Orleans, Louisiana. Cockroach exposure was based on visual inspection using standard protocols. Caregiver stress was measured using Cohen's 4-item Perceived Stress Scale. Outcomes included unscheduled clinic or emergency department (ED) visits, hospitalization, and pulmonary function. Multivariable logistic regression was performed to assess independent effects of the exposure on the outcome and effect modification was examined in stratified analysis based on stress. Path analysis to explore the mediation effect by stress was performed using a probit link with parameters based on Bayes' method with non-informative priors. RESULTS: Adjusting for stress and other covariates, cockroach exposure was associated with unscheduled clinic/ED visits (aOR = 6.2; 95% CI 1.8, 21.7). Positive associations were also found for hospitalization and FEV1 < 80%. High stress modified the relationship with unscheduled clinic/ED visits (high aOR = 7.7 95% CI 1.0, 60.2, versus normal aOR = 4.1 95% CI 0.8, 21.9). Path models identified direct and indirect effects (p = 0.05) indicating that a majority of the total effect on unscheduled clinic/ED visits is attributed directly to cockroach exposure. CONCLUSION: The strong association between cockroach exposure and asthma morbidity is not due to uncontrolled confounding by stress. The combination of cockroach exposure and high stress, common in urban homes, are modifiable factors associated with poor asthma outcomes.

Country-Level Gender Equality and Adolescents' Contraceptive Use in Europe, Canada and Israel: Findings from 33 Countries.

CONTEXT: Although an association between gender equality and contraceptive use has been confirmed among adult samples, few studies have explored this relationship among adolescents. An examination of whether adolescents' contraceptive use is more prevalent in countries with higher levels of gender equality is needed to fill this gap. METHODS: Nationally representative data from 33 countries that participated in the 2013-2014 Health Behaviour in School-Aged Children study and country-level measures of gender equality-using the 2014 Global Gender Gap Index-were analyzed. Multilevel multinomial logistic regression analyses were employed to assess associations between gender equality and contraceptive use (condom only, pill only and dual methods) at last intercourse as reported by 4,071 females and 4,110 males aged 14-16. RESULTS: Increasing gender equality was positively associated with contraceptive use among both males and females. For every 0.1-point increase on the equality scale, the likelihood of condom use at last intercourse rose (odds ratio, 2.1 for females), as did the likelihood of pill use (6.5 and 9.6, respectively, for males and females) and dual method use (2.1 and 5.6, respectively). Associations with pill use and dual use remained significant after national wealth and income inequality were controlled for. Overall, associations were stronger for females than for males. CONCLUSIONS: More research is needed to identify potential causal pathways and mechanisms through which gender equality and adolescents' contraceptive use may influence one another.

Availability of Reproductive Health Care Services at Schools and Subsequent Birth Outcomes Among Adolescent Mothers.

BACKGROUND: Adverse birth outcomes are more common among adolescent versus adult mothers, but little is known about school-based services that may improve birth outcomes in this group. METHODS: Data from Waves I and IV of the National Longitudinal Study of Adolescent Health were analyzed. Girls and women who gave birth to singleton live infants after Wave I and before age 20, were still in secondary school while pregnant, and had complete data (N = 402) were included. Mothers reported infants' birthweight and gestational age. School administrators reported whether family planning counseling, diagnostic screening (including sexually transmitted diseases [STDs]), STD treatment, and prenatal/postpartum health care were provided on-site at school at Wave I. Multilevel models adjusted for individual and school characteristics were conducted. RESULTS: Few schools offered reproductive health care services on-site. In multilevel analyses, availability of family planning counseling (Est. ß = 0.21, 95% confidence interval [CI] 0.04-0.38 p < 0.05) and prenatal/postpartum health care (Est. ß = 0.21, 95% CI 0.02-0.40 p < 0.05) were significantly associated with increased infant birthweight. No services examined were significantly associated with increased gestational age. CONCLUSIONS: Some school-based reproductive health services may improve subsequent birth outcomes among adolescent mothers. Future analyses should examine the mechanisms by which services impact birth outcomes.

Disaster and youth violence: the experience of school-attending youth in New Orleans.

PURPOSE: Although disaster exposure has been linked with increased child aggression by previous reports, population-level trends are unknown. Pre- to post-Katrina changes in violence-related behaviors among New Orleans high school youth (ages: 12-18 years) were assessed. METHODS: Data from the 2003 (pre-Katrina), 2005 (pre-Katrina), and 2007 (post-Katrina) New Orleans Youth Risk Behavior Survey (n = 5,267) were used. Crude comparisons across years of population characteristics and violence behavior prevalence were made with χ(2) analyses. Changes in violence-related behaviors over time were assessed with logistic regression models including indicators for survey years and controls for compositional changes. RESULTS: Age, gender, and race/ethnicity of school-attending youth were stable across years. In models controlling for demographics, most behaviors were stable over time. Some changes were observed for all groups; dating violence and forced sex increased before the storm, whereas weapon-carrying and missing school as a result of feeling unsafe decreased after the storm. Among African American adolescents only, being threatened at school increased before Katrina. CONCLUSIONS: Results do not support significant population-level increases in violent behavior post-Katrina among school-attending youth in New Orleans. Factors that buffered New Orleans students from post-Katrina violence increases, such as population composition changes or increased supportive services, may explain these findings.

Early adolescent sexual initiation as a problem behavior: a comparative study of five nations.

PURPOSE: Using a Problem Behavior Theory framework, this article examines the extent to which psychosocial correlates of early sexual initiation (before age 16) vary across developed nations. METHODS: Fifteen-year-old participants (n = 5,624) in the 1997-1998 World Health Organization collaborative Health Behavior in School-Aged Children survey (Finland, Scotland, France, and Poland) and the 1996 U.S. Add Health survey self-reported substance use (alcohol and tobacco), school attachment, positive parental communication, and early sexual intercourse experience. Stratifying by gender, we performed univariate, bivariate, and multivariable analyses controlling for family socioeconomic status, family structure, and nation fixed effects. RESULTS: Self-reported early sexual experience, substance use, school attachment, and positive communication with parents varied significantly across nations for both boys and girls. In both crude and adjusted analyses, substance use was positively associated with early sexual experience among boys and girls across nations, although associations were stronger in Europe than in the United States (adjusted odds ratio [AOR]; range, 1.56-3.74). School attachment was similarly inversely related to early sexual experience among boys and girls across nations (AOR range, .63-.94). However, positive parent communication was significantly inversely related to early sexual experience only among U.S. females (AOR .50). CONCLUSIONS: Findings overall supported the fit of early adolescent sexual initiation as a risk behavior within a Problem Behavior Theory framework cross-nationally, suggesting that similar factors could be targeted to prevent early sexual initiation across some developed nations. However, further research is warranted examining the temporality of these relationships.