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Displaying 811 - 820 of 6853 in Annals of Internal Medicine
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Implantable Defibrillator System Shock Function, Mortality, and Cause of Death After Magnetic Resonance Imaging
Background: Studies have shown that magnetic resonance imaging (MRI) does not have clinically important effects on the device parameters of non–MRI-conditional implantable cardioverter-defibrillators (ICDs). However, data on non–MRI-conditional ICD detection and treatment of arrhythmias after MRI are limited. Objective: To examine if non–MRI-conditional ICDs have preserved shock function of arrhythmias after MRI. Design: Prospective cohort study. (ClinicalTrials.gov: NCT01130896) Setting: 1 center in the United States. Patients: 629 patients with non–MRI-conditional ICDs enrolled consecutively between February 2003 and January 2015. Interventions: 813 total MRI examinations at a magnetic field strength of 1.5 Tesla using a prespecified safety protocol. Measurements: Implantable cardioverter-defibrillator interrogations were collected after MRI. Clinical outcomes included arrhythmia detection and treatment, generator or lead exchanges, adverse events, and death. Results: During a median follow-up of 2.2 years from MRI to latest available ICD interrogation before generator or lead exchange in 536 patients, 4177 arrhythmia episodes were detected, and 97 patients received ICD shocks. Sixty-one patients (10% of total) had 130 spontaneous ventricular tachycardia or fibrillation events terminated by ICD shocks. A total of 210 patients (33% of total) are known to have died (median, 1.7 years from MRI to death); 3 had cardiac arrhythmia deaths where shocks were indicated without direct evidence of device dysfunction. Limitations: Data were acquired at a single center and may not be generalizable to other clinical settings and MRI facilities. Implantable cardioverter-defibrillator interrogations were not available for a subset of patients; adjudication of cause of death relied solely on death certificate data in a subset. Conclusion: Non–MRI-conditional ICDs appropriately treated detected tachyarrhythmias after MRI. No serious adverse effects on device function were reported after MRI. Primary Funding Source: Johns Hopkins University and National Institutes of Health.
Developing Meaningful Health Care Quality Metrics: An Example From Colonoscopy and Adenoma Detection
Association Between Age and Low-Density Lipoprotein Cholesterol Response to Statins: A Danish Nationwide Cohort Study: Annals of Internal Medicine: Vol 176, No 8
Background: There is large patient-to-patient variability in the low-density lipoprotein cholesterol (LDL-C) response to statin treatment. The reduction in LDL-C may depend on the age of the patient treated—particularly in older adults, who have been substantially underrepresented in randomized controlled trials. Objective: To investigate the association between age and the LDL-C reduction by statins. Design: Nationwide, register-based cohort study. Setting: Denmark, 2008 to 2018. Participants: 82 958 simvastatin or atorvastatin initiators with LDL-C measurements before and during statin use. Measurements: Statin response, defined as percentage reduction in prestatin LDL-C level, and percentage reduction differences (PRDs) according to age and simvastatin or atorvastatin dose based on a longitudinal model for LDL-C. Results: Among 82 958 statin initiators, 10 388 (13%) were aged 75 years or older. With low- to moderate-intensity statins, initiators aged 75 years or older had greater mean LDL-C percentage reductions than initiators younger than 50 years—for example, 39.0% versus 33.8% for simvastatin, 20 mg, and 44.2% versus 40.2% for atorvastatin, 20 mg. The adjusted PRD for initiators aged 75 years compared with initiators aged 50 years was 2.62 percentage points. This association was consistent for primary prevention (2.54 percentage points) and secondary prevention (2.32 percentage points) but smaller for initiators of high-intensity statins (atorvastatin, 40 mg: 1.36 percentage points; atorvastatin, 80 mg: −0.58 percentage point). Limitation: Use of administrative data, observational pre–post comparison with a moderately high proportion of missing data, lack of information on body mass index, and the mainly White study population may limit generalizability. Conclusion: Low- to moderate-intensity statins were associated with a greater reduction in LDL-C levels in older persons than younger persons and may be more appealing as initial treatment in older adults who are at increased risk for adverse events. Primary Funding Source: The Independent Research Fund Denmark, Brødrene Hartmanns Fond, and Fonden til Lægevidenskabens Fremme.
Colinet–Caplan Syndrome: History of an Outbreak of Autoimmune Disease in Scouring Powder Workers
The first modern description linking rheumatoid arthritis to occupational dust exposure is generally attributed to the British physician Anthony Caplan. In 1953, Caplan reported on a “peculiar” nodular pattern on chest radiographs of Welsh coal miners with rheumatoid arthritis that differed from the typical coal workers' pneumoconiosis. However, as early as 1950, the Belgian rheumatologist Émile Colinet described a similar case of rheumatoid arthritis and concomitant pulmonary opacities in a 30-year-old woman with silica exposure. Soon after, he published a second case. Although this condition initially was called Colinet–Caplan syndrome in the Francophone biomedical literature, Colinet's name was later dropped from the eponym. Because Colinet never clearly described the specific occupational context of his cases, Caplan syndrome has been misconstrued as uniquely a disease of coal miners. We attempted to reconstruct the working conditions of Colinet's patients and found that they were packing Vim, a silica-based scouring powder, at the Savonneries Lever Frères factory in Brussels, Belgium. Colinet's cases were only the first 2 in a series of reports of rheumatoid arthritis and other autoimmune diseases, mainly among young women, in those who worked in the production of silica-based scouring powder between the 1930s and 1980s across Europe. The largest outbreak involved 32 cases of autoimmune disease among 50 former workers of a Spanish scouring powder manufacturing facility. After silica in scouring powders was replaced with less hazardous materials later in the 20th century, no further cases have been reported. Although scouring powder disease is a historical phenomenon, autoimmune disorders linked to occupational exposure to silica and coal dust have not disappeared but instead are reemerging among those who work with silica-based artificial stone and in other dusty trades.
Incremental Health Care Costs of Self-Reported Functional Impairments and Phenotypic Frailty in Community-Dwelling Older Adults: A Prospective Cohort Study: Annals of Internal Medicine: Vol 176, No 4
Background: Health care systems need better strategies to identify older adults at risk for costly care to select target populations for interventions to reduce health care burden. Objective: To determine whether self-reported functional impairments and phenotypic frailty are associated with incremental health care costs after accounting for claims-based predictors. Design: Prospective cohort study. Setting: Index examinations (2002 to 2011) of 4 prospective cohort studies linked with Medicare claims. Participants: 8165 community-dwelling fee-for-service beneficiaries (4318 women, 3847 men). Measurements: Weighted (Centers for Medicare & Medicaid Services Hierarchical Condition Category index) and unweighted (count of conditions) multimorbidity and frailty indicators derived from claims. Self-reported functional impairments (difficulty performing 4 activities of daily living) and frailty phenotype (operationalized using 5 components) derived from cohort data. Health care costs ascertained for 36 months after index examinations. Results: Average annualized costs (2020 U.S. dollars) were $13 906 among women and $14 598 among men. After accounting for claims-based indicators, average incremental costs of functional impairments versus no impairment in women (men) were $3328 ($2354) for 1 impairment increasing to $7330 ($11 760) for 4 impairments; average incremental costs of phenotypic frailty versus robust in women (men) were $8532 ($6172). Mean predicted costs adjusted for claims-based indicators in women (men) varied by both functional impairments and the frailty phenotype ranging from $8124 ($11 831) among robust persons without impairments to $18 792 ($24 713) among frail persons with 4 impairments. Compared with the model with claims-derived indicators alone, this model resulted in more accurate cost prediction for persons with multiple impairments or phenotypic frailty. Limitation: Cost data limited to participants enrolled in the Medicare fee-for-service program. Conclusion: Self-reported functional impairments and phenotypic frailty are associated with higher subsequent health care expenditures in community-dwelling beneficiaries after accounting for several claims-based indicators of costs. Primary Funding Source: National Institutes of Health.
Role of Artificial Intelligence in Colonoscopy Detection of Advanced Neoplasias: A Randomized Trial: Annals of Internal Medicine: Vol 176, No 9
Background: The role of computer-aided detection in identifying advanced colorectal neoplasia is unknown. Objective: To evaluate the contribution of computer-aided detection to colonoscopic detection of advanced colorectal neoplasias as well as adenomas, serrated polyps, and nonpolypoid and right-sided lesions. Design: Multicenter, parallel, randomized controlled trial. (ClinicalTrials.gov: NCT04673136) Setting: Spanish colorectal cancer screening program. Participants: 3213 persons with a positive fecal immunochemical test. Intervention: Enrollees were randomly assigned to colonoscopy with or without computer-aided detection. Measurements: Advanced colorectal neoplasia was defined as advanced adenoma and/or advanced serrated polyp. Results: The 2 comparison groups showed no significant difference in advanced colorectal neoplasia detection rate (34.8% with intervention vs. 34.6% for controls; adjusted risk ratio [aRR], 1.01 [95% CI, 0.92 to 1.10]) or the mean number of advanced colorectal neoplasias detected per colonoscopy (0.54 [SD, 0.95] with intervention vs. 0.52 [SD, 0.95] for controls; adjusted rate ratio, 1.04 [99.9% CI, 0.88 to 1.22]). Adenoma detection rate also did not differ (64.2% with intervention vs. 62.0% for controls; aRR, 1.06 [99.9% CI, 0.91 to 1.23]). Computer-aided detection increased the mean number of nonpolypoid lesions (0.56 [SD, 1.25] vs. 0.47 [SD, 1.18] for controls; adjusted rate ratio, 1.19 [99.9% CI, 1.01 to 1.41]), proximal adenomas (0.94 [SD, 1.62] vs. 0.81 [SD, 1.52] for controls; adjusted rate ratio, 1.17 [99.9% CI, 1.03 to 1.33]), and lesions of 5 mm or smaller (polyps in general and adenomas and serrated lesions in particular) detected per colonoscopy. Limitations: The high adenoma detection rate in the control group may limit the generalizability of the findings to endoscopists with low detection rates. Conclusion: Computer-aided detection did not improve colonoscopic identification of advanced colorectal neoplasias. Primary Funding Source: Medtronic.