Prediction of body fat in older adults by time spent in sedentary behavior

The purpose of the study was to determine the relationship between sedentary behavior (SB), physical activity (PA), and body fat (total, abdominal) or body size (body-mass index [BMI], waist circumference [WC]) in community-dwelling adults 50 yr old and over. This study included 232 ambulatory adults (50-87 yr, 37.4% ± 9.6% body fat [BF]). Average daily time spent in SB (<100 counts/min) and light (100-759 counts/min), lifestyle-moderate (760-1,951 counts/min), walking-moderate (1,952-5,724 cts/min), and vigorous-intensity (≥ 5,725 counts/min) PA were determined by accelerometer and corrected for wear time. BF was measured with dual-energy X-ray absorptiometry. SB was positively related to measures of BF. Measures of SB, PA, and gender accounted for 55.6% of the variance in total BF, 32.4% of the variance in abdominal fat, and 28.0% of the variance in WC. SB, PA, and age accounted for 27.1% of the variance in BMI. Time spent in SB should be considered when designing obesity interventions for adults 50 yr old and over.     

Mind‐Mindedness as a Multidimensional Construct: Appropriate and Nonattuned Mind‐Related Comments Independently Predict Infant–Mother Attachment in a Socially Diverse Sample

In a socially diverse sample of 206 infant–mother pairs, we investigated predictors of infants’ attachment security at 15 months, with a particular emphasis on mothers’ tendency to comment appropriately or in a non‐attuned manner on their 8‐month‐olds’ internal states (so‐called mind‐mindedness). Multinomial logistic regression analyses showed that higher scores for appropriate mind‐related comments and lower scores for non‐attuned mind‐related comments distinguished secure‐group mothers from their counterparts in the insecure‐avoidant, insecure‐resistant, and insecure‐disorganized groups. Higher scores for appropriate mind‐related comments and lower scores for non‐attuned mind‐related comments also independently predicted dichotomous organized/disorganized attachment. General maternal sensitivity predicted neither attachment security nor organization, although sensitivity was found to relate to dichotomous secure/insecure attachment specifically in the context of low socioeconomic status. The findings highlight how appropriate and non‐attuned mind‐related comments make independent contributions to attachment and suggest that mind‐mindedness is best characterized as a multidimensional construct.     

Comparison of models for average bioequivalence in replicated crossover designs

Average bioequivalence (ABE) has been the regulatory standard for bioequivalence (BE) since the 1990s. BE studies are commonly two-period crossovers, but may also use replicated designs. The replicated crossover will provide greater power for the ABE assessment. FDA has recommended that ABE analysis of replicated crossovers use a model which includes terms for separate within- and between-subject components for each formulation and which allows for a subject x formulation interaction component. Our simulation study compares the performance of four alternative mixed effects models: the FDA model, a three variance component model proposed by Ekbohm and Melander (EM), a random intercepts and slopes model (RIS) proposed by Patterson and Jones, and a simple model that contains only two variance components. The simple model fails (when not 'true') to provide adequate coverage and it accepts the hypothesis of equivalence too often. FDA and EM models are frequently indistinguishable and often provide the best performance with respect to coverage and probability of concluding BE. The RIS model concludes equivalence too often when both the within- and between-subject variance components differ between formulations. The FDA analysis model is recommended because it provides the most detail regarding components of variability and has a slight advantage over the EM model in confidence interval length.     

Condom negotiation strategy use and effectiveness among college students

College students may engage in risky sexual behaviors, such as inconsistent condom use, which increase their risk of sexually transmitted infections. This study examined the association between six condom influence strategies (CIS) and reported condom use among a diverse group of college students. Differences in CIS and condom use were examined by gender, race or ethnicity, and relationship status (casual, monogamous, or no current relationship). The study also used a cluster analysis to investigate how the CIS were used relative to one another, and how patterns of CIS use were related to condom use. Results showed interesting differences in CIS use by gender, race or ethnicity, and relationship status. Four patterns of CIS usage emerged, and results suggested that using all CIS frequently and using more assertive CIS may be particularly important for increased condom use. Men reported more condom use than women overall, but results indicated that using CIS were especially vital for increasing condom use for women. Surprisingly, there were no differences in condom use found for race or ethnicity and relationship type. Programs aimed at increasing students' condom use could benefit from promoting and practicing CIS, and recognizing potential differences among demographic groups.     

The Cost of Instability: The Effects of Family,Work, and Welfare Change on Low‐Income Women’s Health Insurance Status

The number of uninsured Americans has risen substantially over the last decade. Despite the availability of Medicaid, low‐income women are at particularly elevated risk of having no or inadequate health insurance. How does continuity of work, family, and welfare affect low‐income women’s health insurance status? A multinomial logistic regression analysis of 1,662 low‐income women from the Welfare, Children, and Families: A Three‐City Study provides evidence of the consequences of life changes on access to health insurance from 1999–2005. The results show that compared to those with stable welfare, work, and family attachments, new full‐time employment actually increases low‐income women’s risk of being uninsured as does being underemployed, on welfare, or single for extended periods of time. These findings illustrate how health‐care reform must adequately address the complexity of low‐income women’s lives—including the ways labor market, state, and family factors interact to create barriers to health insurance—in order to improve access to care under the current U.S. health insurance model.     

Examining the relationship between Latinas' perceptions about what constitutes domestic violence and domestic violence victimization

Domestic violence is a serious issue for U.S. Latinas. Better understanding of the potential risk or protection that cultural perceptions about what constitutes domestic violence may convey can help strengthen interventions. Therefore, a convenience sample of 93 Latinas was surveyed about their current levels of domestic violence victimization, acculturation, and demographics, as well as about whether 5 behavioral scenarios constituted domestic violence. Hierarchical multiple regressions were performed to examine the relationships between the 5 perception items and domestic violence victimization. After adjusting for established risk factors, only viewing male partner stalking and female verbal aggression as domestic violence were significantly associated with decreased domestic violence victimization. Findings can be integrated into the development and implementation of culturally competent interventions targeting Latinas.     

Gender Differences in the Developmental Links Between Conduct Problems and Depression Across Early Adolescence

Various developmental models have attempted to explain the relationship between antisocial behavior and depressive symptoms in youth, often proposing intermediary processes such as social and academic functioning. However, few studies have tested these developmental models fully, particularly in mixed‐gender samples. The current study strives to fill this gap in the literature, examining these processes in an early adolescent sample. Results indicated both direct and indirect paths between antisocial behavior and depression. In addition, potentially important gender differences were found. These results underscore the importance of examining direct and indirect links between symptoms of depression and antisocial behavior and suggest that there may be important developmental differences between girls and boys in the relationship between these symptoms.