0
Basic View | Expanded View
Showing 1-20 of 21 Articles
Reviews | 
Margaret A. Piper, PhD, MPH; Corinne V. Evans, MPP; Brittany U. Burda, MPH; Karen L. Margolis, MD, MPH; Elizabeth O'Connor, PhD; and Evelyn P. Whitlock, MD, MPH
Background:Elevated blood pressure (BP) is the largest contributing risk factor to all-cause and cardiovascular mortality. Purpose:To update a systematic review on the benefits and harms of screening for high BP in adults and to summarize evidence on rescreening intervals and diagnostic and predictive accuracy of different BP methods for cardiovascular events. Data Sources:Selected databases searched through 24 February 2014. Study Selection:Fair- and good-quality trials and diagnostic accuracy and cohort studies conducted in adults and published in English. Data Extraction:One investigator abstracted data, and a second checked for accuracy. Study quality was dual-reviewed. Data Synthesis:Ambulatory BP monitoring (ABPM) predicted long-term cardiovascular outcomes independently of office BP (hazard ratio range, 1.28 to 1.40 in 11 studies). Across 27 studies, 35% to 95% of persons with an elevated BP at screening remained hypertensive after nonoffice confirmatory testing. Cardiovascular outcomes in persons who were normotensive after confirmatory testing (isolated clinic hypertension) were similar to outcomes in those who were normotensive at screening. In 40 studies, hypertension incidence after rescreening varied considerably at each yearly interval up to 6 years. Intrastudy comparisons showed at least 2-fold higher incidence in older adults, those with high-normal BP, overweight and obese persons, and African Americans. Limitation:Few diagnostic accuracy studies of office BP methods and protocols in untreated adults. Conclusion:Evidence supports ABPM as the reference standard for confirming elevated office BP screening results to avoid misdiagnosis and overtreatment of persons with isolated clinic hypertension. Persons with BP in the high-normal range, older persons, those with an above-normal body mass index, and African Americans are at higher risk for hypertension on rescreening within 6 years than are persons without these risk factors. Primary Funding Source:Agency for Healthcare Research and Quality.
Topics: hypertension, blood pressure, hypertension screening, accuracy, rescreening, blood pressure determination, blood pressure monitoring, ambulatory, cardiovascular event
Reviews | 
Johan Sundström, MD, PhD; Hisatomi Arima, MD, PhD; Rod Jackson, PhD; Fiona Turnbull, MBChB, MPH (Hons), PhD; Kazem Rahimi, MD; John Chalmers, MD, PhD; Mark Woodward, PhD; Bruce Neal, MBChB, PhD,, on behalf of the Blood Pressure Lowering Treatment Trialists' Collaboration*
Background:Effects of blood pressure reduction in persons with grade 1 hypertension are unclear. Purpose:To investigate whether pharmacologic blood pressure reduction prevents cardiovascular events and deaths in persons with grade 1 hypertension. Data Sources:Trials included in the BPLTTC (Blood Pressure Lowering Treatment Trialists' Collaboration) and trials identified from a previous review and electronic database searches. Study Selection:Patients without cardiovascular disease with blood pressures in the grade 1 hypertension range (140 to 159/90 to 99 mm Hg) who were randomly assigned to an active (antihypertensive drug or more intensive regimen) or control (placebo or less intensive regimen) blood pressure–lowering regimen. Data Extraction:Individual-patient data from BPLTTC trials and aggregate data from other trials were extracted. Risk of bias was assessed for all trials. Data Synthesis:Individual-patient data involved 10 comparisons from trials where most patients had diabetes, and aggregate data involved 3 comparisons from trials of patients without diabetes. The average blood pressure reduction was about 3.6/2.4 mm Hg. Over 5 years, odds ratios were 0.86 (95% CI, 0.74 to 1.01) for total cardiovascular events, 0.72 (CI, 0.55 to 0.94) for strokes, 0.91 (CI, 0.74 to 1.12) for coronary events, 0.80 (CI, 0.57 to 1.12) for heart failure, 0.75 (CI, 0.57 to 0.98) for cardiovascular deaths, and 0.78 (CI, 0.67 to 0.92) for total deaths. Results were similar in secondary analyses. Withdrawal from treatment due to adverse effects was more common in the active groups. Limitation:Blood pressure reductions and numbers of events were small. Conclusion:Blood pressure–lowering therapy is likely to prevent stroke and death in patients with uncomplicated grade 1 hypertension. Primary Funding Source:Swedish Heart-Lung Foundation, Swedish Research Council, Australian Research Council, and National Health and Medical Research Council of Australia.
Topics: hypertension, cardiovascular diseases, blood pressure, cardiovascular event, blood pressure regulation, diabetes mellitus, type 2
The editorialist discusses the implications of 2 systematic reviews in this issue: one by Sundström and colleagues that assesses the evidence on the effects of blood pressure reduction on cardiovascular outcomes in patients with stage 1 hypertension, and the other by Piper and associates that evaluates methods used to identify persons with elevated blood pressure.
Topics: hypertension, blood pressure, blood pressure determination, therapeutics, blood pressure regulation, hypertension screening
Ideas and Opinions | 
Scott D. Halpern, MD, PhD; and Ezekiel J. Emanuel, MD, PhD
Since the early 1980s, many aspects of care near the end of life in the United States have changed dramatically. Yet, despite nearly 30 years of efforts to get persons in the United States to engage in advance care planning, few patients do. In light of this pernicious status quo, the call from the Institute of Medicine Committee on Approaching Death for sweeping overhauls in the delivery of end-of-life care is greatly needed. This commentary discusses the Institute of Medicine report, particularly the committee's recommendation to reimburse physicians for engaging patients in advance care planning.
Topics: palliative care, advance care planning, physician payment, incentives, terminally ill, end-of-life care
Ideas and Opinions | 
Philip A. Pizzo, MD
The co-chair of an Institute of Medicine committee on care at the end of life discusses changes needed in the care of patients approaching death and argues that treating physicians should remain fully present even after their patients enter palliative care or hospice programs.
Topics: end-of-life care, terminally ill, hospice care, palliative care
Ideas and Opinions | 
Debra L. Ness, MS; and Beverley H. Johnson, BSN
There may be no truer test of a health care system than how it supports persons with advanced illness or at the end of life and the loved ones who care for them. In that regard, our health care system struggles and often fails, and this failure contributes to soaring health care costs that put enormous strain on families and our economy. This commentary discusses the Institute of Medicine report “Dying in America: Improving Quality and Honoring Individual Preferences Near the End of Life,” which the authors believe will drive constructive conversations that advance the kind of rational debate that is the essential foundation for better policy and practice.
Topics: end-of-life care, patient-centered care, terminally ill, palliative care, partnerships, family-centered care
In September 2014, the Institute of Medicine released its fifth full report on end-of-life issues and identified recommendations within 5 domains. One recommendation is to educate and engage the public by providing fact-based information about the care of persons with advanced serious illness to encourage advance care planning and informed choices based on the needs and values of individuals. This commentary notes that this is the first Institute of Medicine report on the end of life to explicitly mention public health as having a role in this arena and discusses the promise that this approach offers.
Topics: end-of-life care, terminally ill, public health medicine, advance care planning
Original Research | 
Brian L. Sprague, PhD; Natasha K. Stout, PhD; Clyde Schechter, MD, MA; Nicolien T. van Ravesteyn, PhD; Mucahit Cevik, MS; Oguzhan Alagoz, PhD; Christoph I. Lee, MD, MSHS; Jeroen J. van den Broek, MS; Diana L. Miglioretti, PhD; Jeanne S. Mandelblatt, MD, MPH; Harry J. de Koning, MD, PhD; Karla Kerlikowske, MD, MS; Constance D. Lehman, MD, PhD; and Anna N. A. Tosteson, ScD
Background:Many states have laws requiring mammography facilities to tell women with dense breasts and a negative screening mammography result to discuss supplemental screening tests with their providers. The most readily available supplemental screening method is ultrasonography, but little is known about its effectiveness. Objective:To evaluate the benefits, harms, and cost-effectiveness of supplemental ultrasonography screening for women with dense breasts. Design:Comparative modeling with 3 validated simulation models. Data Sources:Surveillance, Epidemiology, and End Results Program; Breast Cancer Surveillance Consortium; and medical literature. Target Population:Contemporary cohort of women eligible for routine screening. Time Horizon:Lifetime. Perspective:Payer. Intervention:Supplemental ultrasonography screening for women with dense breasts after a negative screening mammography result. Outcome Measures:Breast cancer deaths averted, quality-adjusted life-years (QALYs) gained, biopsies recommended after a false-positive ultrasonography result, and costs. Results of Base-Case Analysis:Supplemental ultrasonography screening after a negative mammography result for women aged 50 to 74 years with heterogeneously or extremely dense breasts averted 0.36 additional breast cancer deaths (range across models, 0.14 to 0.75 deaths), gained 1.7 QALYs (range, 0.9 to 4.7 QALYs), and resulted in 354 biopsy recommendations after a false-positive ultrasonography result (range, 345 to 421 recommendations) per 1000 women with dense breasts compared with biennial screening by mammography alone. The cost-effectiveness ratio was $325 000 per QALY gained (range, $112 000 to $766 000 per QALY gained). Supplemental ultrasonography screening for only women with extremely dense breasts cost $246 000 per QALY gained (range, $74 000 to $535 000 per QALY gained). Results of Sensitivity Analysis:The conclusions were not sensitive to ultrasonography performance characteristics, screening frequency, or starting age. Limitation:Provider costs for coordinating supplemental ultrasonography were not considered. Conclusion:Supplemental ultrasonography screening for women with dense breasts would substantially increase costs while producing relatively small benefits. Primary Funding Source:National Cancer Institute.
Topics: cost effectiveness, mammography, ultrasonography, breast, breast, breast neoplasm screening, breast density, breast cancer
Topics: vitamin d deficiency, vitamin d, screening
Reviews | 
Erin S. LeBlanc, MD, MPH; Bernadette Zakher, MBBS; Monica Daeges, BA; Miranda Pappas, MA; and Roger Chou, MD
Background:Vitamin D deficiency has been associated with adverse health outcomes. Purpose:To systematically review benefits and harms of vitamin D screening in asymptomatic adults. Data Sources:Ovid MEDLINE (through the third week of August 2014), Cochrane Central Register of Controlled Trials, and Cochrane Database of Systematic Reviews. Study Selection: Randomized trials of screening for and treatment of vitamin D deficiency and case–control studies nested within the Women's Health Initiative. Data Extraction:One investigator abstracted data, a second reviewed data for accuracy, and 2 investigators independently assessed study quality using predefined criteria. Data Synthesis:No study examined the effects of vitamin D screening versus no screening on clinical outcomes. Vitamin D treatment was associated with decreased mortality versus placebo or no treatment (11 studies; risk ratio [RR], 0.83 [95% CI, 0.70 to 0.99]), although benefits were no longer seen after trials of institutionalized persons were excluded (8 studies; RR, 0.93 [CI, 0.73 to 1.18]). Vitamin D treatment was associated with possible decreased risk for having at least 1 fall (5 studies; RR, 0.84 [CI, 0.69 to 1.02]) and falls per person (5 studies; incidence rate ratio, 0.66 [CI, 0.50 to 0.88]) but not fractures (5 studies; RR, 0.98 [CI, 0.82 to 1.16]). Vitamin D treatment was not associated with a statistically significant increased risk for serious adverse events (RR, 1.17 [CI, 0.74 to 1.84]). Limitation:Variability across studies in 25-hydroxyvitamin D assays and baseline levels, treatment doses, use of calcium, and duration of follow-up. Conclusion:Treatment of vitamin D deficiency in asymptomatic persons might reduce mortality risk in institutionalized elderly persons and risk for falls but not fractures. Primary Funding Source:Agency for Healthcare Research and Quality.
Topics: vitamin d deficiency, vitamin d, screening
Clinical Guidelines | 
Michael L. LeFevre, MD, MSPH, on behalf of the U.S. Preventive Services Task Force*
Description:New USPSTF recommendation on screening for vitamin D deficiency in adults. Methods:The USPSTF reviewed the evidence on screening for and treatment of vitamin D deficiency, including the benefits and harms of screening and early treatment. Population:This recommendation applies to community-dwelling, nonpregnant adults aged 18 years or older who are seen in primary care settings and are not known to have signs or symptoms of vitamin D deficiency or conditions for which vitamin D treatment is recommended. Recommendation:The USPSTF concludes that the current evidence is insufficient to assess the balance of benefits and harms of screening for vitamin D deficiency in asymptomatic adults. (I statement)
Topics: vitamin d deficiency, vitamin d, screening
Editorials | 
Robert P. Heaney, MD; and Laura A. G. Armas, MD
In this issue, the U.S. Preventive Services Task Force reports that it was unable to find evidence for or against testing for vitamin D deficiency. The editorialists urge practitioners to measure vitamin D status in patients to provide them with patient-specific, personally applicable information that will hopefully improve adherence.
Topics: vitamin d deficiency, disease prevention, screening, nutrients, vitamin d
Original Research | 
Zhihong Liu, MD; Haitao Zhang, MD; Zhangsuo Liu, MD; Changying Xing, PhD; Ping Fu, MD; Zhaohui Ni, MD; Jianghua Chen, MD; Hongli Lin, MD; Fuyou Liu, MD; Yongcheng He, MD; Yani He, MD; Lining Miao, MD; Nan Chen, MD; Ying Li, MD; Yong Gu, MD; Wei Shi, MD; Weixin Hu, MD; Zhengzhao Liu, MD; Hao Bao, MD; Caihong Zeng, PhD; and Minlin Zhou, MD
Includes: Supplemental Content
Background:Treatment of lupus nephritis (LN) remains challenging. Objective:To assess the efficacy and safety of a multitarget therapy consisting of tacrolimus, mycophenolate mofetil, and steroid compared with intravenous cyclophosphamide and steroid as induction therapy for LN. Design:24-week randomized, open-label, multicenter study (ClinicalTrials.gov number: NCT00876616). Setting:26 renal centers in China. Patients:Adults (age 18 to 65 years) with biopsy-proven LN. Intervention:Tacrolimus, 4 mg/d, and mycophenolate mofetil, 1.0 g/d, versus intravenous cyclophosphamide with a starting dose of 0.75 (adjusted to 0.5 to 1.0) g/m2 body surface area every 4 weeks for 6 months. Both groups received 3 days of pulse methylprednisolone followed by a tapering course of oral prednisone therapy. Measurements:The primary end point was complete remission at 24 weeks. Secondary end points included overall response (complete and partial remission), time to overall response, and adverse events. Results:After 24 weeks of therapy, more patients in the multitarget group (45.9%) than in the intravenous cyclophosphamide group (25.6%) showed complete remission (difference, 20.3 percentage points [95% CI, 10.0 to 30.6 percentage points]; P < 0.001). The overall response incidence was higher in the multitarget group than in the intravenous cyclophosphamide group (83.5% vs. 63.0%; difference, 20.4 percentage points [CI, 10.3 to 30.6 percentage points]; P < 0.001), and the median time to overall response was shorter in the multitarget group (difference, −4.1 weeks [CI, −7.9 to −2.1 weeks]). Incidence of adverse events did not differ between the multitarget and intravenous cyclophosphamide groups (50.3% [91 of 181] vs. 52.5% [95 of 181]). Limitation:The study was limited to 24 weeks of follow-up. Conclusion:Multitarget therapy provides superior efficacy compared with intravenous cyclophosphamide as induction therapy for LN. Primary Funding Sources:National Basic Research Program of China, National Key Technology R&D Program.
Topics: prednisone, mycophenolate mofetil, cyclophosphamide, lupus nephritis, methylprednisolone, steroids, tacrolimus, adverse event, complete remission, neoadjuvant therapy, follow-up, renal biopsy
Summaries for Patients | 
Topics: prednisone, mycophenolate mofetil, cyclophosphamide, lupus nephritis, methylprednisolone, neoadjuvant therapy, steroids, tacrolimus, adverse event, complete remission
Clinical Guidelines | 
Richard M. Kaufman, MD; Benjamin Djulbegovic, MD, PhD; Terry Gernsheimer, MD; Steven Kleinman, MD; Alan T. Tinmouth, MD; Kelley E. Capocelli, MD; Mark D. Cipolle, MD, PhD; Claudia S. Cohn, MD, PhD; Mark K. Fung, MD, PhD; Brenda J. Grossman, MD, MPH; Paul D. Mintz, MD; Deborah A. Sesok-Pizzini, MD; Aryeh Shander, MD; Gary E. Stack, MD, PhD; Kathryn E. Webert, MD, MSc; Robert Weinstein, MD; Babu G. Welch, MD; Glenn J. Whitman, MD; Edward C. Wong, MD; and Aaron A.R. Tobian, MD, PhD
Background:Platelet transfusions are administered to prevent or treat bleeding in patients with quantitative or qualitative platelet disorders. The AABB (formerly, the American Association of Blood Banks) developed this guideline on appropriate use of platelet transfusion in adult patients. Methods:These guidelines are based on a systematic review of randomized, clinical trials and observational studies that reported clinical outcomes on patients receiving prophylactic or therapeutic platelet transfusions. A literature search from 1900 to September 2014 with no language restrictions was done. Examined outcomes included all-cause mortality, bleeding-related mortality, bleeding, and number of platelet units transfused. An expert panel reviewed the data and developed recommendations using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) framework. Recommendation 1:The AABB recommends that platelets should be transfused prophylactically to reduce the risk for spontaneous bleeding in hospitalized adult patients with therapy-induced hypoproliferative thrombocytopenia. The AABB recommends transfusing hospitalized adult patients with a platelet count of 10 × 109 cells/L or less to reduce the risk for spontaneous bleeding. The AABB recommends transfusing up to a single apheresis unit or equivalent. Greater doses are not more effective, and lower doses equal to one half of a standard apheresis unit are equally effective (Grade: strong recommendation; moderate-quality evidence). Recommendation 2:The AABB suggests prophylactic platelet transfusion for patients having elective central venous catheter placement with a platelet count less than 20 × 109 cells/L (Grade: weak recommendation; low-quality evidence). Recommendation 3:The AABB suggests prophylactic platelet transfusion for patients having elective diagnostic lumbar puncture with a platelet count less than 50 × 109 cells/L (Grade: weak recommendation; very low-quality evidence). Recommendation 4:The AABB suggests prophylactic platelet transfusion for patients having major elective nonneuraxial surgery with a platelet count less than 50 × 109 cells/L (Grade: weak recommendation; very low-quality evidence). Recommendation 5:The AABB recommends against routine prophylactic platelet transfusion for patients who are nonthrombocytopenic and have cardiac surgery with cardiopulmonary bypass (CPB). The AABB suggests platelet transfusion for patients having CPB who exhibit perioperative bleeding with thrombocytopenia and/or evidence of platelet dysfunction (Grade: weak recommendation; very low-quality evidence). Recommendation 6:The AABB cannot recommend for or against platelet transfusion for patients receiving antiplatelet therapy who have intracranial hemorrhage (traumatic or spontaneous) (Grade: uncertain recommendation; very low-quality evidence).
Topics: hemorrhage, platelet count measurement, platelet transfusion, thrombocytopenia, blood platelets
Reviews | 
J. Bruin Rugge, MD, MPH; Christina Bougatsos, MPH; and Roger Chou, MD
Includes: Supplemental Content
Background:In 2004, the U.S. Preventive Services Task Force found insufficient evidence to recommend thyroid screening. Purpose:To update the 2004 U.S. Preventive Services Task Force review on the benefits and harms of screening and treatment of subclinical and undiagnosed overt hypothyroidism and hyperthyroidism in adults without goiter or thyroid nodules. Data Sources:MEDLINE and Cochrane databases through July 2014. Study Selection: Randomized, controlled trials and observational studies of screening and treatment. Data Extraction:One investigator abstracted data, and a second investigator confirmed; 2 investigators independently assessed study quality. Data Synthesis:No study directly assessed benefits and harms of screening versus no screening. For subclinical hypothyroidism (based on thyroid-stimulating hormone levels of 4.1 to 11.0 mIU/L), 1 fair-quality cohort study found that treatment of subclinical hypothyroidism was associated with decreased risk for coronary heart disease events versus no treatment. No study found that treatment was associated with improved quality of life, cognitive function, blood pressure, or body mass index versus no treatment. Effects of treatment versus no treatment showed potential beneficial effects on lipid levels, but effects were inconsistent, not statistically significant in most studies, and of uncertain clinical significance (difference, −0.7 to 0 mmol/L [−28 to 0 mg/dL] for total cholesterol levels and −0.6 to 0.1 mmol/L [−22 to 2 mg/dL] for low-density lipoprotein cholesterol levels). Treatment harms were poorly studied and sparsely reported. Two poor-quality studies evaluated treatment of subclinical hyperthyroidism but examined intermediate outcomes. No study evaluated treatment versus no treatment of screen-detected, undiagnosed overt thyroid dysfunction. Limitations:English-language articles only, no treatment study performed in the United States, and small trials with short duration that used different dosage protocols. Conclusion:More research is needed to determine the clinical benefits associated with thyroid screening. Primary Funding Source:Agency for Healthcare Research and Quality.
Topics: thyroid diseases, subclinical hypothyroidism
Original Research | 
Dan Yamin, PhD; Shai Gertler; Martial L. Ndeffo-Mbah, PhD; Laura A. Skrip, MPH; Mosoka Fallah, PhD; Tolbert G. Nyenswah, MPH; Frederick L. Altice, MD, MA; and Alison P. Galvani, PhD
Includes: Supplemental Content
Background:The Ebola outbreak that is sweeping across West Africa is the largest, most volatile, and deadliest Ebola epidemic ever recorded. Liberia is the most profoundly affected country, with more than 3500 infections and 2000 deaths recorded in the past 3 months. Objective:To evaluate the contribution of disease progression and case fatality to transmission and to examine the potential for targeted interventions to eliminate the disease. Design:Stochastic transmission model that integrates epidemiologic and clinical data on incidence and case fatality, daily viral load among survivors and nonsurvivors evaluated on the basis of the 2000–2001 outbreak in Uganda, and primary data on contacts of patients with Ebola in Liberia. Setting:Montserrado County Liberia, July to September 2014. Measurements:Ebola incidence and case fatality records from 2014 Liberian Ministry of Health and Social Welfare. Results:The average number of secondary infections generated throughout the entire infectious period of a single infected case, R0, was estimated as 1.73 (95% CI, 1.66 to 1.83). There was substantial stratification between survivors (R0Survivors), for whom the estimate was 0.66 (CI, 0.10 to 1.69) and nonsurvivors (the R0Nonsurvivors), for whom the estimate was 2.36 (CI, 1.72 to 2.80). The nonsurvivors had the highest risk for transmitting the virus later in the course of disease progression. Consequently, the isolation of 75% of infected individuals in critical condition within 4 days from symptom onset has a high chance of eliminating the disease. Limitations:Projections are based on the initial dynamics of the epidemic, which may change as the outbreak and interventions evolve. Conclusion:These results underscore the importance of isolating the most severely ill patients with Ebola within the first few days of their symptomatic phase. Primary Funding Source:National Institutes of Health.
Topics: disease progression, disease transmission, ebola virus disease, liberia, epidemic control, ebola virus, viral load result
Ideas and Opinions | 
Henry M. Wu, MD; Jessica K. Fairley, MD; James Steinberg, MD; and Phyllis Kozarsky, MD
Recommendations for evaluation of patients with possible Ebola virus disease have focused on hospital emergency departments and inpatient units as the loci of care. However, patients may instead present to ambulatory settings. The authors describe a dedicated travel clinic–based program for such evaluation that uses existing phone triage systems, provides assessment by infectious disease experts, and ensures appropriate isolation and infection control.
Topics: ebola virus, ambulatory care services, ebola virus disease
Ideas and Opinions | 
Mark G. Kortepeter, MD, MPH; Philip W. Smith, MD; Angela Hewlett, MD; and Theodore J. Cieslak, MD
Medical centers in the United States are coming to grips with the need to prepare for care of patients with Ebola virus disease. The authors of this commentary discuss the challenges of treating these patients in a conventional setting and call for a network of strategically located regional referral centers serving designated catchment areas.
Topics: ebola virus, containment of biohazards, ebola virus disease, nosocomial infection
Ideas and Opinions | 
Andrew Hantel, MD; and Christopher Olusola Olopade, MD, MPH
A World Health Organization advisory panel recently concluded that it is ethical to use experimental medications and vaccines that have not been formally approved or tested in humans to treat persons with Ebola in the current West African epidemic. The authors of this commentary urge the medical community to focus on implementing the current standard of care fairly while maintaining principled experimentation to provide a better future standard.
Topics: ebola virus, ebola virus disease, epidemic, experimental treatment, compassionate use, ebola vaccines
Advertisement
Forgot your password?
Enter your username and email address. We'll send you a reminder to the email address on record.
(Required)
(Required)