In a random assignment study, substance-abusing patients with HIV/AIDS in a public general hospital received a brief contact condition or received 12 months of case management delivered by paraprofessionals. Patient outcomes included substance use, HIV transmission risk, physical health, psychological status, and quality of living situation. In both conditions, a significant decrease occurred in a range of problems from Intake to the 6-month interview, followed by no significant pattern of change at 12- and 18-month interviews. On major outcome variables, there were no significant differences between the brief contact and case management conditions. Sixteen percent had died by the 18-month interview. Process data indicated wide variation in the amount of case management received by participants, and the amount of case management was not related to improvement in the outcome measures. The study has limitations yet does not support the hypothesis that case management improves outcomes better than brief contact for this population.

This compendium of articles provides a clear view of the factors affecting the health of Americans and the role of public health, medical care, and the community in ensuring the nation's health. The Seventh Edition continues the emphasis of earlier editions on the health of the population, the determinants of health, women's health, long term care, and the precarious set of circumstances faced by the nation's public health and health care systems as we begin the 21st century.

New issues, particularly related to bioterrorism and community health are addressed in this edition. This volume also includes coverage of tobacco, immunizations, HIV/AIDS, environmental health, dietary guidelines, physical activity, and food safety. In addition, a major new feature is an article on community problem solving, emphasizing a multidisciplinary approach to collaborative practice and research to improve community health.

From the wild swings of the stock market to the online auctions of eBay to the unexpected twists of the world's post-Communist economies, markets have suddenly become quite visible. We now have occasion to ask, "What makes these institutions work? How important are they? How can we improve them?"

Taking us on a lively tour of a world we once took for granted, John McMillan offers examples ranging from a camel trading fair in India to the $20 million per day Aalsmeer flower market in the Netherlands to the global trade in AIDS drugs. Eschewing ideology, he shows us that markets are neither magical nor immoral. Rather, they are powerful if imperfect tools, the best we've found for improving our living standards. A New York Times Notable Book. W. W. Norton & Company

As policymakers consider expanding insurance coverage for the human immunodeficiency virus (HIV+) population, it is useful to ask whether insurance has any effect on health outcomes, and, if so, whether public insurance is as efficacious as private insurance in preventing premature death. Using data from a nationally representative cohort of HIV-infected persons receiving regular medical care, we estimate the impact of different types of insurance on mortality in this population. Our main findings are that (1) ignoring observed and unobserved health status misleads one to conclude that insurance may not be protective for HIV patients, (2) after accounting for observed and unobserved heterogeneity, insurance does protect against premature death, and (3) private insurance is more effective than public insurance. The better performance of private insurance can be explained in part by more restrictive Medicaid prescription drug policies that limit access to highly efficacious treatment.

The second half of the 20th century witnessed spectacular advances in health care. Innovations such as magnetic resonance imaging, genetically engineered growth factors, and highly effective drugs for the treatment of depression, gastroesophageal reflux, high blood cholesterol, and HIV disease greatly improved the detection and treatment of both rare and common diseases. The advances greatly improved the outcomes of complex procedures such as organ transplantation, coronary artery bypass surgery, and high-dose chemotherapy (bone marrow transplantation) for acute myeloid leukemia and multiple myeloma. As the 21st century opens, technological progress in medicine is continuing and may be accelerating. It is a source of hope for the prevention, effective treatment, and cure of disease.

Technological innovation is also the major source of increases in real per capita medical spending in the United States. If medical advances continue to be adopted as rapidly as they have been, they will pose knotty economic, political, and ethical challenges for health care policy at a time when spending on health care in the United States has once again begun to surge after a mid-1990s pause and the number of Americans without health insurance has once again begun growing.

Background: Policy and clinical decisions regarding children's nutrition are often based on dietary intake estimates from self-reports. The accuracy of these estimates depends on memory of both the type of food eaten and the amount consumed. Although children's self-reports of food intake are widely used, there is little research on their ability to estimate food portions.

Objective: To assess the validity of children's estimates of the food portions they consume by means of 2 types of measurement aids: standard 2-dimensional food portion visuals and manipulative props.

Design: Randomized controlled trial.

Participants: Fifty-four African American girls aged 8 to 12 years.

Main Outcome Measures: Girls were served a standard meal and actual intake was assessed by weighing food portions before and after the meal. On completion of the meal, dietitians collected food recalls and portion size estimates from the girls by means of both manipulative props and 2-dimensional food portion visuals, administered in a randomized order.

Results: Absolute value percentage differences between actual and estimated grams of food consumed averaged 58.0% (SD, 102.7%) for manipulative props and 32.8% (SD, 72.8%) for 2-dimensional food portion visuals. Spearman correlations between actual and estimated intakes with both portion size measurement aids were high (range, r = 0.56 to 0.79; all P.001), with the exception of bread intake (r = 0.16, P =.43). Correlations with actual intakes did not differ significantly between the 2 methods.

Conclusions: Children's self-reported portion size estimates are appropriate for ranking children's relative intakes, but they result in sizable errors in quantitative estimates of food and energy intakes. Caution should be used in interpreting quantitative dietary intake estimates derived from children's self-reports.