Effectiveness of Screening Colonoscopy to Prevent Colorectal Cancer Among Medicare Beneficiaries Aged 70 to 79 Years: A Prospective Observational Study: Annals of Internal Medicine: Vol 166, No 1

Background: No randomized, controlled trials of screening colonoscopy have been completed, and ongoing trials exclude persons aged 75 years or older. The Medicare program, however, reimburses screening colonoscopy without an upper age limit. Objective: To evaluate the effectiveness and safety of screening colonoscopy to prevent colorectal cancer (CRC) in persons aged 70 to 74 and those aged 75 to 79 years. Design: Large-scale, population-based, prospective study. The observational data were used to emulate a target trial with 2 groups: colonoscopy screening and no screening. Setting: United States. Participants: 1 355 692 Medicare beneficiaries (2004 to 2012) aged 70 to 79 years at average risk for CRC who used Medicare preventive services and had no previous diagnostic or surveillance colonoscopies in the past 5 years. Measurements: 8-year risk for CRC and 30-day risk for adverse events. Results: In beneficiaries aged 70 to 74 years, the 8-year risk for CRC was 2.19% (95% CI, 2.00% to 2.37%) in the screening colonoscopy group and 2.62% (CI, 2.56% to 2.67%) in the no-screening group (absolute risk difference, −0.42% [CI, −0.24% to −0.63%]). Among those aged 75 to 79 years, the 8-year risk for CRC was 2.84% (CI, 2.54% to 3.13%) in the screening colonoscopy group and 2.97% (CI, 2.92% to 3.03%) in the no-screening group (risk difference, −0.14% [CI, −0.41 to 0.16]). The excess 30-day risk for any adverse event in the colonoscopy group was 5.6 events per 1000 individuals (CI, 4.4 to 6.8) in the 70- to 74-year age group and 10.3 per 1000 (CI, 8.6 to 11.1) in the 75- to 79-year age group. Limitation: CRC-specific mortality was not available, but CRC incidence and stage were studied at diagnosis. Conclusion: Screening colonoscopy may have had a modest benefit in preventing CRC in beneficiaries aged 70 to 74 years and a smaller benefit in older beneficiaries. The risk for adverse events was low but greater among older persons. Primary Funding Source: National Institutes of Health.

The Relationship of Obesity to Hospice Use and Expenditures: A Cohort Study: Annals of Internal Medicine: Vol 166, No 6

Background: Obesity complicates medical, nursing, and informal care in severe illness, but its effect on hospice use and Medicare expenditures is unknown. Objective: To describe the associations between body mass index (BMI) and hospice use and Medicare expenditures in the last 6 months of life. Design: Retrospective cohort. Setting: The HRS (Health and Retirement Study). Participants: 5677 community-dwelling Medicare fee-for-service beneficiaries who died between 1998 and 2012. Measurements: Hospice enrollment, days enrolled in hospice, in-home death, and total Medicare expenditures in the 6 months before death. Body mass index was modeled as a continuous variable with a quadratic functional form. Results: For decedents with BMI of 20 kg/m2, the predicted probability of hospice enrollment was 38.3% (95% CI, 36.5% to 40.2%), hospice duration was 42.8 days (CI, 42.3 to 43.2 days), probability of in-home death was 61.3% (CI, 59.4% to 63.2%), and total Medicare expenditures were $42 803 (CI, $41 085 to $44 521). When BMI increased to 30 kg/m2, the predicted probability of hospice enrollment decreased by 6.7 percentage points (CI, −9.3 to −4.0 percentage points), hospice duration decreased by 3.8 days (CI, −4.4 to −3.1 days), probability of in-home death decreased by 3.2 percentage points (CI, −6.0 to −0.4 percentage points), and total Medicare expenditures increased by $3471 (CI, $955 to $5988). For morbidly obese decedents (BMI ≥40 kg/m2), the predicted probability of hospice enrollment decreased by 15.2 percentage points (CI, −19.6 to −10.9 percentage points), hospice duration decreased by 4.3 days (CI, −5.7 to −2.9 days), and in-home death decreased by 6.3 percentage points (CI, −11.2 to −1.5 percentage points) versus decedents with BMI of 20 kg/m2. Limitation: Baseline data were self-reported, and the interval between reported BMI and time of death varied. Conclusion: Among community-dwelling decedents in the HRS, increasing obesity was associated with reduced hospice use and in-home death and higher Medicare expenditures in the last 6 months of life. Primary Funding Source: Robert Wood Johnson Foundation Clinical Scholars Program.

Public Opinion Regarding Whether Speaking With Patients About Firearms Is Appropriate: Results of a National Survey: Annals of Internal Medicine: Vol 165, No 8

Background: Health care providers have been encouraged to discuss firearms with patients; whether patients view these discussions as appropriate is unclear. Objective: To estimate, in a national sample, the perceived appropriateness of provider discussions about firearms. Design: Probability-based online survey conducted in April 2015. Analyses used survey weights to generate nationally representative estimates. Setting: U.S. adults. Participants: 3914 English-speaking adults (55% participation rate). Measurements: Participants were asked, “In general, would you think it is never, sometimes, usually, or always appropriate for physicians and other health professionals to talk to their patients about firearms?” Results: A majority (66% [95% CI, 63% to 69%]) of participants said that it is at least sometimes appropriate for providers to talk to patients about firearms. Specifically, 23% (CI, 20% to 25%) said that provider discussions about firearms were always appropriate, 14% (CI, 11% to 16%) said that they were usually appropriate, and 30% (CI, 27% to 33%) thought they were sometimes appropriate; 34% (CI, 31% to 37%) felt that such discussions were never appropriate. Views varied by firearm ownership: 54% (CI, 52% to 57%) of gun owners said that provider discussions are at least sometimes appropriate, compared with 67% (CI, 62% to 71%) of nonowners living with an owner and 70% (CI, 66% to 74%) of nonowners not living with an owner. Firearm owners who were more likely to think that firearm discussions are at least sometimes appropriate included those with children at home (62% [CI, 57% to 67%]), those who thought that having a gun at home increases suicide risk (75% [CI, 67% to 83%), and those who thought that provider discussions of seat belts are at least sometimes appropriate (73% [CI, 70% to 75%]). Limitations: The provider discussion question did not specify clinical context. Conclusion: Two thirds of non–firearm owners and over one half of firearm owners in the United States believe that health care provider discussions about firearms are at least sometimes appropriate. The observed heterogeneity underscores the need to better understand assumptions that may underlie these views, particularly among firearm owners. Primary Funding Source: Fund for a Safer Future and Joyce Foundation.

The Emergence of Zika Virus: A Narrative Review: Annals of Internal Medicine: Vol 165, No 3

Zika virus (ZIKV) is yet another arbovirus that is rapidly emerging on a global scale, on the heels of a chikungunya epidemic in the Americas that began in 2013. A ZIKV epidemic that began in Brazil in 2015 has now spread rapidly to more than 30 countries in the Americas and the Caribbean, infecting more than 2 million inhabitants. This epidemic currently continues unabated. The explosive nature of recent outbreaks and concerning links to Guillain–Barré syndrome and microcephaly are incompletely understood. Also unknown is the relative importance of sexual transmission of ZIKV and asymptomatic ZIKV infections to the overall burden of transmission. The limited understanding of ZIKV presents an enormous challenge for responses to this rapidly emerging threat to human health. This article reviews the existing literature on ZIKV and proposes critical questions for vaccine development and other areas of needed research.

The CMS Sepsis Mandate: Right Disease, Wrong Measure

Aspirin for Disease Prevention: Public Policy or Personal Choice?

Diagnosis of Acute Gout: A Clinical Practice Guideline From the American College of Physicians

Description: The American College of Physicians (ACP) developed this guideline to present the evidence and provide clinical recommendations on the diagnosis of gout. Methods: This guideline is based on a systematic review of published studies on gout diagnosis, identified using several databases, from database inception to February 2016. Evaluated outcomes included the accuracy of the test results; intermediate outcomes (results of laboratory and radiographic tests, such as serum urate and synovial fluid crystal analysis and radiographic or ultrasonography changes); clinical decision making (additional testing and pharmacologic or dietary management); short-term clinical (patient-centered) outcomes, such as pain and joint swelling and tenderness; and adverse effects of the tests. This guideline grades the evidence and recommendations by using the ACP grading system, which is based on the GRADE (Grading of Recommendations Assessment, Development and Evaluation) method. Target Audience and Patient Population: The target audience for this guideline includes all clinicians, and the target patient population includes adults with joint inflammation suspected to be gout. Recommendation: ACP recommends that clinicians use synovial fluid analysis when clinical judgment indicates that diagnostic testing is necessary in patients with possible acute gout. (Grade: weak recommendation, low-quality evidence)

Dual Health Care System Use and High-Risk Prescribing in Patients With Dementia: A National Cohort Study: Annals of Internal Medicine: Vol 166, No 3

Background: Recent federal policy changes attempt to expand veterans' access to providers outside the Department of Veterans Affairs (VA). Receipt of prescription medications across unconnected systems of care may increase the risk for unsafe prescribing, particularly in persons with dementia. Objective: To investigate the association between dual health care system use and potentially unsafe medication (PUM) prescribing. Design: Retrospective cohort study. Setting: National VA outpatient care facilities in 2010. Participants: 75 829 veterans with dementia who were continuously enrolled in Medicare from 2007 to 2010; 80% were VA-only users, and 20% were VA–Medicare Part D (dual) users. Measurements: Augmented inverse propensity weighting was used to estimate the effect of dual-system versus VA-only prescribing on 4 indicators of PUM prescribing in 2010: any exposure to Healthcare Effectiveness Data and Information Set (HEDIS) high-risk medication in older adults (PUM-HEDIS), any daily exposure to prescriptions with a cumulative Anticholinergic Cognitive Burden (ACB) score of 3 or higher (PUM-ACB), any antipsychotic prescription (PUM-antipsychotic), and any PUM exposure (any-PUM). The annual number of days of each PUM exposure was also examined. Results: Compared with VA-only users, dual users had more than double the odds of exposure to any-PUM (odds ratio [OR], 2.2 [95% CI, 2.2 to 2.3]), PUM-HEDIS (OR, 2.4 [CI, 2.2 to 2.8]), and PUM-ACB (OR, 2.1 [CI, 2.0 to 2.2]). The odds of PUM-antipsychotic exposure were also greater in dual users (OR, 1.5 [CI, 1.4 to 1.6]). Dual users had an adjusted average of 44.1 additional days of any-PUM exposure (CI, 37.2 to 45.0 days). Limitation: Observational study design of veteran outpatients only. Conclusion: Among veterans with dementia, rates of PUM prescribing are significantly higher among dual-system users than with VA-only users. Primary Funding Source: U.S. Department of Veterans Affairs.

Effect of Structured Physical Activity on Overall Burden and Transitions Between States of Major Mobility Disability in Older Persons: Secondary Analysis of a Randomized Trial: Annals of Internal Medicine: Vol 165, No 12

Background: The total time a patient is disabled likely has a greater influence on his or her quality of life than the initial occurrence of disability alone. Objective: To compare the effect of a long-term, structured physical activity program with that of a health education intervention on the proportion of patient assessments indicating major mobility disability (MMD) (that is, MMD burden) and on the risk for transitions into and out of MMD. Design: Single-blinded, parallel-group, randomized trial. (ClinicalTrials.gov: NCT01072500) Setting: 8 U.S. centers between February 2010 and December 2013. Participants: 1635 sedentary persons, aged 70 to 89 years, who had functional limitations but could walk 400 m. Intervention: Physical activity (n = 818) and health education (n = 817). Measurements: MMD, defined as the inability to walk 400 m, was assessed every 6 months for up to 3.5 years. Results: During a median follow-up of 2.7 years, the proportion of assessments showing MMD was substantially lower in the physical activity (0.13 [95% CI, 0.11 to 0.15]) than the health education (0.17 [CI, 0.15 to 0.19]) group, yielding a risk ratio of 0.75 (CI, 0.64 to 0.89). In a multistate model, the hazard ratios for comparisons of physical activity with health education were 0.87 (CI, 0.73 to 1.03) for the transition from no MMD to MMD; 0.52 (CI, 0.10 to 2.67) for no MMD to death; 1.33 (CI, 0.99 to 1.77) for MMD to no MMD; and 1.92 (CI, 1.15 to 3.20) for MMD to death. Limitation: The intention-to-treat principle was maintained for MMD burden and first transition out of no MMD, but not for subsequent transitions. Conclusion: A structured physical activity program reduced the MMD burden for an extended period, in part through enhanced recovery after the onset of disability and diminished risk for subsequent disability episodes. Primary Funding Source: National Institute on Aging, National Institutes of Health.

Enhancing the Role of Internists in the Transition From Pediatric to Adult Health Care