Defining Essential Features of Myalgic Encephalomyelitis and Chronic Fatigue Syndrome

Considerable debate surrounds the search for the defining features of patients with myalgic encephalomyelitis (ME) and chronic fatigue syndrome (CFS). Current case definitions were created through clinical consensus. Failure to operationalize these case definitions has led to considerable variability in the identification of patients. In addition, some case definitions do not require cardinal symptoms of this illness, whereas other case definitions do require core symptoms of this illness, and these latter case criteria appear to identify a more impaired group of patients. Criterion variance is most likely to occur when operationally explicit criteria do not exist for diagnostic categories, or when there are varying criteria for contrasting case definitions, which is an impediment to the research in this field. To deal with this problem, it is possible to differentiate those that meet more loosely defined criteria from those that are more narrowly and defined, thus differentiating CFS from ME. In order to progress the search for biological markers and effective treatments, essential features need to be operationalized and broadly used to increase the probability that individuals included in samples have the same underlying illness.     

Maintenance of community change: enforcing youth access to tobacco laws

Youth access to tobacco remains a significant problem for this nation. Methods have been developed to reduce youth access to commercial outlets and these involve enforcement efforts of monitoring and fining merchant offenders. In the present study, over a three year period of time, readiness to participate in these types of enforcement programs were assessed in 11 communities. Several years after the research study was completed, enforcement activities were re-assessed. Findings indicated that those communities that had made the largest changes in community readiness to enforce youth access laws during the three year intervention were the ones most likely to continue enforcement activities into the follow-up period. There is a need to better understand how youth access to tobacco community-based interventions can be maintained.     

Misdirection on the road to Shangri-La

Will life expectancy in the United States rise or fall in this century? The implications of either scenario are far reaching. We contend that the rise of childhood obesity in the United States in the past three decades has been so dramatic that it will soon lead to higher than expected death rates at middle ages and a possible decline in life expectancy by midcentury. The most detrimental health and longevity effects will not be seen for decades--a phenomenon that cannot be detected by current methods used to forecast life expectancy or estimate the number of deaths currently attributable to obesity. This scenario contrasts sharply with the views of mathematical demographers who generate forecasts by relying on the assumption that the U.S. pattern of longevity will follow that of other longer lived nations and on the extrapolation of historical trends in life expectancy into the future.     

Parents' and children's perceptions of family processes in inner-city families with delinquent youths: a qualitative investigation

This study explored youths' and parents' perceptions of family interaction processes as well as the broader social and cultural factors that influence family functioning in a multiethnic sample of inner-city families with delinquent youth. In-depth interviews were conducted with 61 male youths and 33 parents predominantly from minority families. Guided by an ecological framework, qualitative data analyses were employed to explore individual and contextual factors that were perceived either to foster or to impede individual and family functioning. Findings supported previous empirical research highlighting the importance of family interaction processes in the lives of delinquent youths. Analysis of parent and youth data revealed important relationships among the individual, family, and community domains. The emphases placed on these interrelationships, however, varied in distinct and notable ways for parents and youths. The implications of these divergent patterns for family-level interventions are addressed.     

Synthetic-Fuel Plants: Potential Tumor Risks to Public Health

This article quantifies potential public health risks from tumor-producing pollutants emitted from two synthetic-fuel plants (direct liquefaction--Exxon Donor Solvent: and indirect liquefaction--Lurgi Fischer-Tropsch) located at a representative site in the eastern United States. In these analyses gaseous and aqueous waste streams were characterized; exposures via inhalation, terrestrial and aquatic food chains, and drinking water supplies were modeled. Analysis suggested that emissions of "polycyclic aromatic hydrocarbons," "aromatic amines," "neutral N, O, S heterocyclics," "nitriles," and "other trace elements" pose the largest quantifiable risks to public health. Data and analysis for these pollutant categories should be refined to more accurately match compound-specific estimated exposure levels with tumorigenic potency estimates. Before these results are used for regulatory purposes, more detailed analysis for selected pollutant classes are needed, and more sophisticated aquatic exposure models must be developed. Also, differences in geographic scales among the environmental transport models used need to be rectified.     

The consequences of family crowding: A theoretical synthesis

This article reviews the literature on crowding in non-family and family settings, identifies flaws in past research, presents a model for the study of crowding, and outlines a theory of crowding. Although the focus of this analysis is on crowding within the family, the model and theory are applicable, in principle, to any context in which too many people live in too little space.Leonard Beeghley is Associate Professor, Department of Sociology, University of Florida, Gainesville, FL 32611. He received his Ph.D. from the University of California at Riverside. His research interest focuses on issues in stratification and theory development. The research reported here is the initial stage of an attempt at understanding the effect of crowding on families.Denise Donnelly is a Ph.D. candidate, Department of Sociology, University of Florida, Gainesville, FL 32611. Her current area of interest focuses on cross-cultural perspectives on women's status.