Research glut and information famine: making research evidence more useful for policymakers.

The gap between the two worlds of researchers and policymakers renders the use of research in the policy-making process problematic. Policymakers have three primary needs in their use of research evidence: clear translation, accessible and easy-to-use information, and relevance to the policy context. These needs are sometimes at odds with the priorities of the research community. This paper describes the Robert Wood Johnson Foundation's Synthesis Project, which aims to strengthen links between research and policy making by synthesizing evidence on pressing health policy questions.

Are the uninsured responsible for the increase in emergency department visits in the United States?

STUDY OBJECTIVE: The rise in emergency department (ED) use in the United States is frequently attributed to increased visits by the uninsured. We determine whether insurance status is associated with the increase in ED visits. METHODS: Using the national Community Tracking Study Household Surveys from 1996 to 1997, 1998 to 1999, 2000 to 2001, and 2003 to 2004, we determined for each period the proportion of reported adult ED visits according to insurance status, family income, usual source of care, health status, and outpatient (non-ED) visits. Trends over time were tested for statistical significance. RESULTS: The proportion of adult ED visits by persons without insurance was stable across the decade. Uninsured individuals accounted for 15.5% of ED visits in 1996 to 1997, 16.1% in 1998 to 1999, 15.2% in 2000 to 2001, and 14.5% of visits in 2003 to 2004 (P for trend=.43). The proportion of visits by persons whose family income was greater than 400% of the federal poverty level increased from 21.9% to 29.0% (P=.002). The proportion of visits by those whose usual source of care was a physician's office increased from 52.4% in 1996 to 1997 to 59.0% in 2003 to 2004 (P=.002), whereas the proportion of visits by those without a usual source of care was essentially unchanged (9.7% of visits in 1996 to 1997 and 9.6% in 2003 to 2004; P=.74). CONCLUSION: The rise in ED visits between 1996 and 2003 cannot be primarily attributed to the uninsured. Major contributors to increasing ED utilization appear to be disproportionate increases in use by nonpoor persons and by persons whose usual source of care is a physician's office.

Characteristics of frequent users of emergency departments.

STUDY OBJECTIVE: We identify frequent users of the emergency department (ED) and determine the characteristics of these patients. METHODS: Using the 2000 to 2001 population-based, nationally representative Community Tracking Study Household Survey, we determined the number of adults (aged 18 and older) making 1 to 7 or more ED visits and the number of visits for which they accounted. Based on the distribution of visits, we established a definition for frequent user of 4 or more visits. Multivariate analysis assessed the likelihood that individuals with specific characteristics used the ED more frequently. RESULTS: An estimated 45.2 million adults had 1 or more ED visits. Overall, 92% of adult users made 3 or fewer visits, accounting for 72% of all adult ED visits; the 8% of users with 4 or more visits were responsible for 28% of adult ED visits. Most frequent users had health insurance (84%) and a usual source of care (81%). Characteristics independently associated with frequent use included poor physical health (odds ratio [OR] 2.54; 95% confidence interval [CI] 2.08 to 3.10), poor mental health (OR 1.70; 95% CI 1.42 to 2.02), greater than or equal to 5 outpatient visits annually (OR 3.02; 95% CI 1.94 to 4.71), and family income below the poverty threshold (OR 2.36; 95% CI 1.70 to 3.28). Uninsured individuals were more likely to report frequent use, but this result was only marginally significant (OR 2.38; 95% CI 0.99 to 5.74). Individuals who lacked a usual source of care were actually less likely to be frequent users. CONCLUSION: The majority of adults who use the ED frequently have insurance and a usual source of care but are more likely than less frequent users to be in poor health and require medical attention. Additional support systems and better access to alternative sites of care would have the benefit of improving the health of these individuals and may help to reduce ED use.

Does lack of a usual source of care or health insurance increase the likelihood of an emergency department visit? Results of a national population-based study.

STUDY OBJECTIVE: We determined whether having a usual source of care or health insurance is associated with the likelihood of an emergency department (ED) visit. METHODS: This was a multivariate analysis of the 2000 to 2001 nationally representative Community Tracking Study Household Survey to assess the independent association of usual source of care, health insurance, income, and health status with the likelihood of making 1 or more ED visits in the previous year. RESULTS: Based on a sample of 49,603 adults, an estimated 45.3 million adults reported 79.6 million ED visits in the previous year; 83.1% of these visitors identified a usual source of care other than an ED. Persons with poor physical health status made 48.4% of visits. Adults without a usual source of care were less likely to have had an ED visit than those whose usual source of care was a private physician (odds ratio [OR] 0.75). Uninsured individuals were no more likely to have an ED visit than insured individuals. Poor physical health (OR 2.41), poor mental health (OR 1.51), 5 or more outpatient visits during the year (OR 4.05), and changes in insurance coverage (OR 1.14) or usual source of care (OR 1.32) during the year were associated with an ED visit. Enrollment in a health maintenance organization and satisfaction with one's physician were not independently associated with ED use. CONCLUSION: ED users are similar to nonusers with regard to health insurance and usual source of care but are more likely to be in poor health and have experienced disruptions in regular care. The success of efforts to decrease ED use may depend on improving delivery of outpatient care.