Improving health communication with photographic images that increase identification in three minority populations.

The homophily principle, that perceived similarities among people produce positive reactions, is a cross-cultural, global phenomenon. This study aimed to test the prediction that photographs that depict models similar to the target population improve health communication by increasing perceived identification in three racial/ethnic populations. Three separate nationally representative stratified samples (n = 1638) of African American, Hispanic and Native American adults were drawn from GfK's Knowledge Panel�. Participants read a message advocating increased physical activity and improved diets and completed measures on behavioral intentions, outcome and self-efficacy expectations and identification. The message contained photographs from a stock photograph service or photographs created for the research project to match the three minority populations, Real Health Photos (RHP). Structural equation modeling confirmed the theoretical hypothesis that RHP which matched the minority population increased behavioral intentions and was mediated by identification (P < 0.05) in all three racial/ethnic minority samples. Messages with only half of the matched RHP images had these same positive indirect effects among African Americans and Hispanics (P < 0.05). The impact of matching visual images in health messages to recipients derived from identification with the characters in images. Homophily and identification are hardwired, evolutionary, biological phenomena that should be capitalized on health educators with minority populations.

Smoking cessation alters subgingival microbial recolonization.

Smoking cessation improves the clinical manifestations of periodontitis; however, its effect on the subgingival biofilm, the primary etiological agent of periodontitis, is unclear. The purpose of this study was to investigate, longitudinally, if smoking cessation altered the composition of the subgingival microbial community, by means of a quantitative, cultivation-independent assay for bacterial profiling. Subgingival plaque was collected at baseline, and 3, 6, and 12 months post-treatment from smokers who received root planing and smoking cessation counseling. The plaque was analyzed by terminal restriction fragment length polymorphism (t-RFLP). Microbial profiles differed significantly between smokers and quitters at 6 and 12 months following smoking cessation. The microbial community in smokers was similar to baseline, while quitters demonstrated significantly divergent profiles. Changes in bacterial levels contributed to this shift. These findings reveal a critical role for smoking cessation in altering the subgingival biofilm and suggest a mechanism for improved periodontal health associated with smoking cessation.

Varying ratios of omega-6: omega-3 fatty acids on the pre-and postmortem bone mineral density, bone ash, and bone breaking strength of laying chickens.

The purpose of this study was to investigate the effects of varying ratios of n-6 to n-3 fatty acids in the diets of White Leghorn chickens on tibia bone characteristics [bone mineral density, bone mineral content (BMC), ash bone mineral content, bone morphology, and cortical thickness] and tibia bone strength parameters (ultimate force, bending stress, maximum strain, Young's modulus of elasticity, area under the curve, and moment of inertia). Seventy-five 16-wk-old female White Leghorn chickens were randomly assigned to 1 of 5 dietary ratios of n-6 to n-3 fatty acids: 47.8:1, 18.0:1, 7.6:1, 5.9:1, or 4.7:1. Corn oil was the n-6 fatty acid source, whereas flax oil provided the n-3 fatty acids. Bone density was measured on the left tibia via dual-energy x-ray absorptiometry (DXA) prior to killing and after excision. Bones were ashed in a muffle furnace at 500 degrees F. Tibia bones were broken by using a 3-point bending rig. Results showed no significant effect of diet on bone characteristics. There were no significant differences among diet groups for parameters of bone strength except cortical thickness (P < or = 0.01). Bone mineral content determined by ashing was significantly different by 9.2% (P < or = 0.0001) from BMC determined in vivo by DXA; however, there were no differences in ex vivo BMC and BMC ash, although they were highly correlated (r = 0.99, P < or = 0.0001). We concluded that there was no effect of n-3 fatty acids on tibia bone in mature White Leghorn chickens. The GE Lunar Prodigy DXA instrument significantly underestimated the in vivo BMC in chickens.

Consumers' knowledge, understanding, and attitudes toward health claims on food labels.

The purpose of this study was to assess consumers' knowledge of current fiber recommendations and their attitudes, understanding, and awareness of health claims on breakfast cereal labels. An incidental sample of 241 respondents was drawn from four grocery stores of a local chain in Utah. Data were collected using a computerized interviewing system. The results suggested that consumers with higher education levels had a better understanding of diet-disease-related messages and a more positive attitude toward health messages on food labels. Knowledge of fiber was significantly correlated with positive attitudes toward health messages and understanding of health messages. Overall, attitudes toward placing diet-disease-related messages on food labels were positive. On a scale of 1 through 250, the mean score was 182.5 +/- 37.5 standard deviation (73%). Consumer knowledge of fiber was low. Out of 15 possible points, the mean score for fiber knowledge questions was 8.8 +/- 2.1 (59%). Consumers were more familiar with the role fiber may play in the prevention or treatment of certain diseases or conditions than with sources, classifications, and recommended intakes of fiber. Understanding of health messages was relatively low (45%). Whereas consumer attitudes toward health messages on food labels were positive, consumers (especially less-educated consumers) did not appear to understand the messages well. These results reiterate the concern for public policymakers to exercise caution and ensure that health messages on food labels are responsible and accurate. The results should also remind dietetic practitioners, who are the nutrition experts, of their continual role in providing and ensuring accurate nutrition education to the public.