George B. Schreiber

The Risk of Transfusion-Transmitted Viral Infections

Background Accurate estimates of the risk of transfusion-transmitted infectious disease are essential for monitoring the safety of the blood supply and evaluating the potential effect of new screening tests. We estimated the risk of transmitting the human immunodeficiency virus (HIV), the human T-cell lymphotropic virus (HTLV), the hepatitis C virus (HCV), and the hepatitis B virus (HBV) from screened blood units donated during the window period following a recent, undetected infection. Methods Using data on 586,507 persons who each donated blood more than once between 1991 and 1993 at five blood centers (for a total of 2,318,356 allogeneic blood donations), we calculated the incidence rates of seroconversion among those whose donations passed all the screening tests used. We adjusted these rates for the estimated duration of the infectious window period for each virus. We then estimated the further reductions in risk that would result from the use of new and more sensitive viral-antigen or nucleic acid s...

Transfusion‐transmitted bacterial infectionin the United States, 1998 through 2000

BACKGROUND: Bacterial contamination of blood components can result in transfusion‐transmitted infection, but the risk is not established.

Comparative sensitivity of HBV NATs and HBsAg assays for detection of acute HBV infection

BACKGROUND: A study was designed to estimate relative analytic sensitivity and window‐period (WP) closure and to project incremental yield of newer HBsAg tests, pooled‐sample NAT, and single‐sample NAT, compared to currently licensed HBsAg tests.

The effect of previous pregnancy and transfusion on HLA alloimmunization in blood donors: implications for a transfusion-related acute lung injury risk reduction strategy

BACKGROUND: Antibodies to human leukocyte antigens (HLA) in donated blood have been implicated as a cause of transfusion‐related acute lung injury (TRALI). A potential measure to reduce the risk of TRALI includes screening plateletpheresis donors for HLA antibodies. The prevalence of HLA antibodies and their relationship to previous transfusion or pregnancy in blood donors was determined.

Motivations to donate blood: demographic comparisons

BACKGROUND: Understanding blood donor motivations is crucial to improving effectiveness of donor recruitment and retention programs.

Eating disorder symptoms in a cohort of 11 to 16‐year‐old black and white girls: The NHLBI growth and health study

OBJECTIVE This study sought to provide reference data for the Eating Disorder Inventory (EDI) with use of young adolescent black and white girls. Moreover, the study examined the relationship between race, age, socioeconomic status, and adiposity and each of the eight EDI scales. METHOD To achieve these aims, data were used that had been collected in Years 3, 5, and 7 as part of the National Heart, Lung, and Blood Institute Growth and Health Study, a longitudinal cohort study of risk factors for obesity in black and white girls. For the present report, data were available from 2,228 girls in Year 3, 2,056 girls in Year 5, and 1,902 girls in Year 7. RESULTS EDI scores were found to vary by race, age, socioeonomic status, and body weight of respondents. Black girls scored different from white girls on all EDI subscales. Scores on all but two subscales (Body Dissatisfaction, Drive for Thinness) decreased significantly with increasing age. Significant inverse associations were found between maximum parental education and all EDI subscales except Body Dissatisfaction and Perfectionism. Elevated body weight was associated significantly with Body Dissatisfaction, Drive for Thinness, Bulimia, Interoceptive Awareness, and Ineffectiveness. DISCUSSION Our results illustrate the importance of taking into consideration the potentially confounding role of demographic characteristics and body weight when comparing different race or ethnic groups on the EDI.

Eating disturbance and body image: A comparison of a community sample of adult black and white women

OBJECTIVE This study examined racial differences in eating disorder symptomatology in a community-based sample of middle-aged adult Black and White women and investigated predictors of body image dissatisfaction in these two different racial groups, since most research has focused on young adult White women. METHOD Subjects (538 Black and White women) completed the Eating Disorder Inventory and measures of social pressures about thinness and negative attitudes about overweight. RESULTS Black and White women reported comparable levels of eating disturbance. However, after controlling for degree of overweight, White women had significantly greater rates of body dissatisfaction than Black women. Nonetheless, both racial groups reported considerable body image dissatisfaction and similar factors were found to predict body dissatisfaction for Black and White women. DISCUSSION Our data and other recent data indicate that eating disturbance occurs across a much broader age, race, and socioeconomic distribution than previously suspected. Research implications are discussed.

Convenience, the bane of our existence, and other barriers to donating

BACKGROUND:  To prevent donor loss and improve retention, it is important to understand the major deterrents to blood donation and to identify factors that can be effectively addressed by blood centers.

Race, socioeconomic status, and obesity in 9- to 10-year-old girls: The NHLBI growth and health study

The purpose of this investigation was to determine whether measures of socioeconomic status (SES) are inversely associated with obesity in 9- to 10-year-old black and white girls and their parents. Subjects were participants in the Growth and Health Study (NGHS) of the National Heart, Lung, and Blood Institute. Extensive SES, anthropometric, and dietary data were collected at baseline on 2379 NGHS participants. The prevalence of obesity was examined in the NGHS girls and parents in relation to SES and selected environmental factors. Less obesity was observed at higher levels of household income and parental education in white girls but not in black girls. Among the mothers of the NGHS participants who were seen, lower prevalence of obesity was observed with higher levels of income and education for white mothers, but no consistent patterns were seen in black mothers. Univariate logistic models indicated that the prevalence of obesity was significantly and inversely associated with parental income and education and number of parents in the household in white girls whereas caloric intake and TV viewing were significantly and positively associated with obesity. Among black girls, only TV viewing was significantly and positively associated with the prevalence of obesity. Multivariate logistic regression models revealed that lower parental educational attainment, one-parent household, and increased caloric intake were significantly associated with the prevalence of obesity in white girls; for black girls, only increased hours of TV viewing were significant in these models. It is concluded that socioeconomic status, as measured by education and income, was related to the prevalence of obesity in girls, with racial variation in these associations. A lower prevalence of obesity was seen at higher levels of socioeconomic status in white girls, whereas no clear relationship was detected in black girls. These findings raise new questions regarding the correlates of obesity in black girls.

Drive for thinness in black and white preadolescent girls

This study examined racial differences in drive for thinness, a motivational variable implicated in the etiology of eating disorders. Subjects included 613 black and white preadolescent girls from one of three National Heart, Lung, and Blood Institute (NHLBI) Growth and Health Study centers. Instruments included the Drive for Thinness Scale, a Criticism about Weight scale, the Self-Perception Profile for Children, a Sexual Maturation index, and 3-day food diaries. Black girls reported significantly greater drive for thinness than white girls. Drive for thinness was significantly associated with adiposity in both groups; additional predictors included criticism about weight for black girls and dissatisfaction with physical appearance for white girls. Correlations between drive for thinness and nutrient intakes were not significant. The finding of a greater drive for thinness among young black girls is provocative, given the higher prevalence of obesity and the lower prevalence of anorexia nervosa among black women. Longitudinal follow-up will examine the significance of drive for thinness in the development of weight and eating disorders in this cohort.