Baseline design elements and sample characteristics for seven sites participating in the Nutrition Working Group of the Behavior Change Consortium.

The purpose of this article is to describe the baseline design elements and sample characteristics of the Behavior Change Consortium (BCC) Dietary Measurement studies for each of the 7 sites that comprised the BCC Nutrition Working Group (NWG). This article summarizes the project designs, including descriptions of diverse study populations, primary assessment methods, and study outcomes. Common measures used across sites included the National Cancer Institute (NCI) Fruit and Vegetable Screener, NCI Percentage Energy from Fat Screener, 24-h dietary recalls, and a single- or 2-item fruit and vegetable measure. Data on sociodemographic characteristics, body weight and height, smoking status, and serum carotenoids were also collected. Study design information such as assessment time points, as well as baseline sample characteristics, is also described. This paper provides the overall framework and descriptive information and serves as the reference for the BCC NWG special supplement.

Correspondence of the NCI Fruit and Vegetable Screener to repeat 24-H recalls and serum carotenoids in behavioral intervention trials.

Five sites participating in the NCI Behavior Change Consortium administered the NCI Fruit and Vegetable Screener (FVS) and multiple, nonconsecutive 24-h dietary recall interviews (24HR) to 590 participants. Three sites also obtained serum carotenoids (n = 295). Participants were primarily female, ethnically diverse, and varied by age and education. Correlations between 24HR and FVS by site ranged from 0.31 (P = 0.07) to 0.47 (P < 0.01) in men and from 0.43 to 0.63 (P < 0.01) in women. Compared with 24HR, FVS significantly (P < 0.05) overestimated intake at 2 of 4 sites for men and all 4 sites for women. Differences in estimated total servings of fruits and vegetables/d ranged from 0.16 to 3.06 servings. On average, the FVS overestimated intake by 1.76 servings in men and 2.11 servings in women. Alternative FVS scoring procedures and a 1-item screener lowered correlations with 24HR as well as serum carotenoids but alternate scoring procedures generally improved estimations of servings.

Use of signal detection methodology to identify subgroups of dietary supplement use in diverse populations.

Despite widespread use of dietary supplements, little is known about correlates and determinants of their use. Using a diverse sample from 7 interventions participating in the Behavior Change Consortium (n = 2539), signal detection methodology (SDM) demonstrated a method for identifying subgroups with varying supplement use. An SDM model was explored with an exploratory half of the entire sample (n = 1268) and used 5 variables to predict dietary supplement use: cigarette smoking, fruit and vegetable intake, dietary fat consumption, BMI, and stage of change for physical activity. A comparison of rates of supplement use between the exploratory model groups and comparably identified groups in the reserved, confirmatory sample (n = 1271) indicates that these analyses may be generalizable. Significant indicators of any supplement use included smoking status, percentage of energy from fat, and fruit and vegetable consumption. Although higher supplement use was associated with healthy behaviors overall, many of the identified groups exhibited mixed combinations of healthy and unhealthy behaviors. The results of this study suggest that patterns of dietary supplement use are complex and support the use of SDM to identify possible population characteristics for targeted and tailored health communication interventions.

A qualitative study of a nutrition working group.

The Behavioral Change Consortium (BCC) Nutrition Workgroup (NWG) is a multidisciplinary collaboration of representatives from BCC sites and federal agencies. Its mission is to improve measurement of dietary variables. This article presents findings from a qualitative study of perceived effectiveness of the workgroup collaboration. Twelve in-depth interviews were conducted and examined for common themes using the constant comparison method. Themes contributing to perceived effectiveness included: funding and additional resources; invested, committed, and collegial members; strong leadership, clearly articulated goals, and regular communication. Influences seen as reducing effectiveness were: distance, disparate nature of the studies, limited time, and problems associated with starting collaboration after the primary studies had begun data collection. NWG members felt that the workgroup would continue to be successful; however, there were concerns about responsibility for writing and authorship of manuscripts and the need for continued funding to ensure full participation and productivity.

Yours, mine, and ours: the importance of scientific collaboration in advancing the field of behavior change research.

The Behavior Change Consortium (BCC) has provided a unique opportunity to combine and explore resources, data, processes, and knowledge as a means of strengthening the validity, reliability, and outcomes that compose the field of behavioral science. The workgroups of the BCC were able to transcend disciplinary boundaries by developing a collaborative framework that fused scholarship and creativity to explore research problems in the area of health behavior change theory and intervention. We have identified seven common elements that emerged from each workgroup and fostered inclusion, progress, and ultimately results. These elements were (a) establishing communication channels, (b) identifying objectives, (c) utilizing common measures, (d) obtaining financial support, (e) seeking outside feedback, (f) engaging "big picture" thinking, and (g) bridging theory to practice. In this article we describe the various processes involved in the creation and sustainability of the BCC, including internal and external communications, leadership, workgroup roles, private and public partnerships, and issues associated with data sharing. We also discuss why, in the case of the BCC, the whole is far greater than the sum of its parts. We present this example of unparalleled multibehavioral research collaboration as a model to other collaborative efforts that will be spawned by the new National Institutes of Health Roadmap initiative.

Strategies for retaining study participants in behavioral intervention trials: retention experiences of the NIH Behavior Change Consortium.

Failing to retain an adequate number of study participants in behavioral intervention trials poses a threat to interpretation of study results and its external validity. This qualitative investigation describes the retention strategies promoted by the recruitment and retention committee of the Behavior Change Consortium, a group of 15 university-based sites funded by the National Institutes of Health to implement studies targeted toward disease prevention through behavior change. During biannual meetings, focus groups were conducted with all sites to determine barriers encountered in retaining study participants and strategies employed to address these barriers. All of the retention strategies reported were combined into 8 thematic retention categories. Those categories perceived to be most effective for retaining study participants were summarized and consistencies noted among site populations across the life course (e.g., older adults, adults, children, and adolescents). Further, possible discrepancies between site populations of varying health statuses are discussed, and an ecological framework is proposed for use in future investigations on retention.