Most Americans consume magnesium at levels below the RDA. Individuals with intakes below the RDA are more likely to have elevated CRP, which may contribute to cardiovascular disease risk.

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PURPOSEThe prevalence of diabetes in the United States is increasing. There is also concern that diabetes may be occurring at a greater frequency in youth and in young adults. We describe US population trends in self-reported age at diagnosis of type 2 diabetes mellitus. METHODSWe undertook a secondary analysis of data from the National Health and Nutrition Examination Survey (NHANES) 1999 and NHANES III (1988-1994. Both surveys are stratifi ed, multistage probability samples targeting the civilian, noninstitutionalized US population, which allow calculation of population estimates. We included adults aged 20 years and older. We compared selfreported age at diagnosis of type 2 diabetes between the 2 survey periods. RESULTSThe mean age at diagnosis decreased from 52.0 to 46.0 years (P <.05). Racial and ethnic differences in age at diagnosis found in 1988 to 1994 are no longer found in 1999 to 2000.CONCLUSIONS The age at diagnosis of type 2 diabetes mellitus has decreased with time. This fi nding likely represents a combination of changing diagnostic criteria, improved physician recognition of diabetes, and increased public awareness. Younger age at diagnosis may also refl ect a true population trend of earlier onset of type 2 diabetes. INTRODUCTIONT he prevalence of diagnosed diabetes in the United States is increasing, coincident with increases in the prevalence of obesity and sedentary lifestyle. 1-3 Among adults in the United States, population estimates of the prevalence of diagnosed diabetes increased from 3. 4% in 1976 to 1980, to 5.1% in 1988 to 1994, to 5.9% in 1999 to 2000. 4-6 Rates of diagnosed diabetes for racial and ethnic minorities generally exceeded that of non-Hispanic whites. [4][5][6] There has been concern that child and adolescent age-groups have also been affected by rising trends in type 2 diabetes mellitus. 7,8 The prevalence of overweight children and adolescents is increasing in the United States. 9,10 Although there have not been US population estimates of the prevalence of type 2 diabetes in youth, an increase in type 2 diabetes has been noted in pediatric diabetes referral centers, as well as in Pima Indians. 11,12 Additionally, there have not been estimates of population trends in age of onset of type 2 diabetes among adults in the United States.Given the increasing prevalence of diabetes in the United States and the evidence that type 2 diabetes is being diagnosed in younger populations, the onset of type 2 diabetes may be occurring at a much younger age in the US population as a whole. help defi ne the magnitude of this health problem. We report the mean self-reported age at diagnosis of type 2 diabetes and make comparisons between the most recently available population data from the National Health and Nutrition Examination Survey (NHANES 1999(NHANES -2000, and data from the Third National Health and Nutrition Examination Survey (NHANES III) (1988)(1989)(1990)(1991)(1992)(1993)(1994). METHODS Data SourcesWe analyzed data from the NHANES 1999-2000 and the NHANES III....

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PURPOSE Many researchers fi nd it diffi cult to recruit individuals, particularly minorities, for participation in studies. Mistrust of research and researchers may act as a barrier to participation. The purpose of this study was to develop a scale for assessing trust in medical researchers. METHODSWe developed a multi-item scale by means of multiple cognitive pretests with 25 African American adults and a random-digit-dialing telephone survey of 512 adults in South Carolina. Psychometric characteristics of the Trust in Medical Researchers Scale was assessed by factor analysis using both orthogonal and oblique rotations and Cronbach's α. We assessed construct validity as well as a behavioral intention for future participation in a medical research project. RESULTSThe results of the orthogonal and oblique rotations in the exploratory factor analysis were similar and suggested 2 distinct factors in the fi nal 12 items included in the scale. Cronbach's α for the entire scale was 0.84, whereas it was 0.78 for the fi rst factor of Participant Deception and 0.75 for the second factor of Researcher Honesty. White respondents (28.7 ± 5.6) had greater trust than African American respondents (24.1 ± 6.9) (P <.001). Individuals with high trust in medical researchers were more likely to express interest in future participation in medical research.