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These Annals of Internal Medicine results only contain recent articles.

Achieving Health Equity in Preventive Services: A Systematic Review for a National Institutes of Health Pathways to Prevention Workshop

Background: Disadvantaged populations in the United States experience disparities in the use of preventive health services. Purpose: To examine effects of barriers that create health disparities in 10 recommended preventive services for adults, and to evaluate the effectiveness of interventions to reduce them. Data Sources: English-language searches of Ovid MEDLINE, PsycINFO, SocINDEX, and the Veterans Affairs Health Services database (1 January 1996 to 5 July 2019); reference lists. Study Selection: Trials, observational studies with comparison groups, and systematic reviews of populations adversely affected by disparities that reported effects of barriers on use of any of the 10 selected preventive services or that reported the effectiveness of interventions to reduce disparities in use of a preventive service by improving intermediate or clinical outcomes. Data Extraction: Dual extraction and assessment of study quality, strength of evidence, and evidence applicability. Data Synthesis: No studies reported effects of provider-specific barriers on preventive service use. Eighteen studies reporting effects of patient barriers, such as insurance coverage or lack of a regular provider, on preventive service use had mixed and inconclusive findings. Studies of patient–provider interventions (n = 12), health information technologies (n = 11), and health system interventions (n = 88) indicated higher cancer screening rates with patient navigation; telephone calls, prompts, and other outreach methods; reminders involving lay health workers; patient education; risk assessment, counseling, and decision aids; screening checklists; community engagement; and provider training. Single studies showed that clinician-delivered and technology-assisted interventions improved rates of smoking cessation and weight loss, respectively. Limitation: Insufficient or low strength of evidence and applicability for most interventions except patient navigation, telephone calls and prompts, and reminders involving lay health workers. Conclusion: In populations adversely affected by disparities, patient navigation, telephone calls and prompts, and reminders involving lay health workers increase cancer screening. Primary Funding Source: National Institutes of Health Office of Disease Prevention through an interagency agreement with the Agency for Healthcare Research and Quality. (PROSPERO: CRD42018109263)

Risk for Subdeltoid Bursitis After Influenza Vaccination: A Population-Based Cohort Study: Annals of Internal Medicine: Vol 173, No 4

Background: Subdeltoid bursitis has been reported as an adverse event after intramuscular vaccination in the deltoid muscle. Most published case reports involved influenza vaccine. Objective: To estimate the risk for subdeltoid bursitis after influenza vaccination. Design: Retrospective cohort study. Setting: The Vaccine Safety Datalink, which contains health encounter data for 10.2 million members of 7 U.S. health care organizations. Patients: Persons who received an inactivated influenza vaccine during the 2016–2017 influenza season. Measurements: Potential incident cases were identified by searching administrative data for persons with a shoulder bursitis diagnostic code within 180 days after receiving an injectable influenza vaccine in the same arm. The date of reported bursitis symptom onset was abstracted from the medical record. A self-controlled risk interval analysis was used to calculate the incidence rate ratio of bursitis in a risk interval of 0 to 2 days after vaccination versus a control interval of 30 to 60 days, which represents the background rate. The attributable risk was also estimated. Results: The cohort included 2 943 493 vaccinated persons. Sixteen cases of symptom onset in the risk interval and 51 cases of symptom onset in the control interval were identified. The median age of persons in the risk interval was 57.5 years (range, 24 to 98 years), and 69% were women. The incidence rate ratio was 3.24 (95% CI, 1.85 to 5.68). The attributable risk was 7.78 (CI, 2.19 to 13.38) additional cases of bursitis per 1 million persons vaccinated. Limitation: The results may not be generalizable to vaccinations done in other types of health care settings. Conclusion: Although an increased risk for bursitis after vaccination was present, the absolute risk was small. Primary Funding Source: Centers for Disease Control and Prevention.

National Institutes of Health Pathways to Prevention Workshop: Achieving Health Equity in Preventive Services

Expert groups, including the U.S. Preventive Services Task Force (USPSTF), recommend a range of clinical preventive services for persons at average risk for disease. Use of these services often is substantially lower among racial and ethnic minority groups, rural residents, and persons of lower socioeconomic status. On 19 and 20 June 2019, the National Institutes of Health (NIH) convened the Pathways to Prevention Workshop: Achieving Health Equity in Preventive Services to assess the available evidence on disparities in the use of 10 USPSTF-recommended clinical preventive services for cancer, heart disease, and diabetes. The workshop was cosponsored by the NIH Office of Disease Prevention; National Institute on Minority Health and Health Disparities; National Cancer Institute; National Heart, Lung, and Blood Institute; and National Institute of Diabetes and Digestive and Kidney Diseases. A multidisciplinary working group developed the agenda, and an Evidence-based Practice Center prepared the evidence report. During the workshop, invited experts considered the evidence, with discussion among attendees. After weighing evidence from the review, presentations, and public comments, an independent panel prepared a draft report that was posted for public comment. This final report summarizes the panel's findings, identifying current gaps in knowledge. The panel made 26 recommendations for new research and methods development to improve implementation of proven services to reduce disparities in preventable conditions.

Effects of Interleukin-1β Inhibition on Incident Anemia: Exploratory Analyses From a Randomized Trial: Annals of Internal Medicine: Vol 172, No 8

Background: Inflammatory cytokines, such as interleukin (IL)-1β, alter iron homeostasis and erythropoiesis, resulting in anemia, but whether inhibition of IL-1β can reverse these effects is unclear. Objective: To determine whether IL-1β inhibition with canakinumab reduces incident anemia and improves hemoglobin levels among those with prevalent anemia. Design: Exploratory analysis of a randomized controlled trial. (ClinicalTrials.gov: NCT01327846) Setting: Many clinical sites in 39 countries. Participants: 8683 CANTOS (Canakinumab Anti-inflammatory Thrombosis Outcomes Study) participants without anemia at trial entry and 1303 with prevalent anemia at trial entry. Intervention: Random assignment to receive placebo or canakinumab (50, 150, or 300 mg) subcutaneously once every 3 months. Measurements: Primary outcome was incident anemia (hemoglobin level <130 g/L in men or <120 g/L in women). Results: Anemia incidence increased with rising baseline levels of high-sensitivity C-reactive protein (hsCRP), and both hsCRP and IL-6 decreased among participants receiving canakinumab compared with the placebo group. During a median follow-up of 3.7 years, participants without baseline anemia who received canakinumab at any dosage had significantly less incident anemia than those who received placebo (hazard ratio, 0.84 [95% CI, 0.77 to 0.93]; P < 0.001). Compared with placebo, the greatest benefits of IL-1β inhibition on incident anemia were observed among participants with the most robust anti-inflammatory response, an effect corroborated in formal mediation analyses. Among those with baseline anemia, canakinumab increased mean hemoglobin levels by 11.3 g/L (P < 0.001) compared with placebo after 2 years of treatment. Canakinumab increased the risk for infection and was associated with mild cases of thrombocytopenia and neutropenia, none of which was grade 3 or higher. Limitation: CANTOS was not designed to assess the cause of anemia in individual trial participants. Conclusion: These exploratory analyses of randomized trial data provide proof of principle that inflammation inhibition, at least through the IL-1β/IL-6 signaling pathway, reduces the incidence of anemia and improves hemoglobin levels in patients with anemia. Primary Funding Source: Novartis Pharmaceuticals.

Health Care Administrative Costs in the United States and Canada, 2017

Background: Before Canada's single-payer reform, its payment system, health costs, and number of health administrative personnel per capita resembled those of the United States. By 1999, administration accounted for 31% of U.S. health expenditures versus 16.7% in Canada. No recent comprehensive analyses of those costs are available. Objective: To quantify 2017 spending for administration by insurers and providers. Design: Analyses of government reports, accounting data that providers file with regulators, surveys of physicians, and census-collected data on employment in health care. Setting: United States and Canada. Measurements: Insurance overhead; administrative expenditures of hospitals, physicians, nursing homes, home care agencies, and hospices. Results: U.S. insurers and providers spent $812 billion on administration, amounting to $2497 per capita (34.2% of national health expenditures) versus $551 per capita (17.0%) in Canada: $844 versus $146 on insurers' overhead; $933 versus $196 for hospital administration; $255 versus $123 for nursing home, home care, and hospice administration; and $465 versus $87 for physicians' insurance-related costs. Of the 3.2–percentage point increase in administration's share of U.S. health expenditures since 1999, 2.4 percentage points was due to growth in private insurers' overhead, mostly because of high overhead in their Medicare and Medicaid managed-care plans. Limitations: Estimates exclude dentists, pharmacies, and some other providers; accounting categories for the 2 countries differ somewhat; and methodological changes probably resulted in an underestimate of administrative cost growth since 1999. Conclusion: The gap in health administrative spending between the United States and Canada is large and widening, and it apparently reflects the inefficiencies of the U.S. private insurance–based, multipayer system. The prices that U.S. medical providers charge incorporate a hidden surcharge to cover their costly administrative burden. Primary Funding Source: None.