Effects of Route Complexity and Lighting on Route Following in Alzheimer's Disease and Posterior Cortical Atrophy.

Objective: Visual processing deficits arising in dementia are associated with particular functional disability. This study aimed to investigate the effects of the built environment on mobility and navigation in people with dementia-related visual loss.

Methods: Participants with posterior cortical atrophy (PCA; "visual-variant Alzheimer's"; n = 11), typical Alzheimer's disease (tAD; N = 10), and controls (n = 13) repeatedly walked down routes within a simplified real-world setting.

Providers Paid Substantially Less By Marketplace Nongroup Insurers Than By Employer Small-Group Plans, 2021.

Numerous studies show that employer plans pay providers significantly more than Medicare, but less is known about prices in nongroup plans sold both on and off the Marketplaces established by the Affordable Care Act (ACA), where narrow networks and low-cost insurers are more prevalent. We estimated prices for three market segments (Marketplace nongroup, off-Marketplace nongroup, and employer small group) and three types of services (professional, outpatient hospital, and inpatient hospital) relative to a Medicare benchmark. We used 2021 claims data covering virtually all enrollment in ACA risk-adjusted plans.

Increased Aortic Stiffness With Acute Exercise in Heart Failure: Assessment by Cardiovascular Magnetic Resonance.

This study aimed to investigate the acute changes in proximal aortic distensibility, a measure of aortic stiffness, induced by acute exercise in participants with and without heart failure (HF). Participants with HF (n = 24) and without HF (n = 26) underwent cardiovascular magnetic resonance (CMR) (1.5 T) imaging at rest and after submaximal supine bicycle ergometry.

Association Between Medicare Site-Based Payment Policy, Physician Practice Characteristics, and Vertical Integration Among Oncologists.

Purpose: Medicare's differential payments for services delivered in physician offices versus hospital outpatient settings incentivize hospital-physician integration (ie, vertical integration) across many specialties, but evidence for oncologists is mixed. We examined the association of Medicare site-based payment policy and physician practice characteristics, including service volume and diversity, with vertical integration among oncologists in 2013-2019.

Methods: Using the Medicare Provider Utilization and Payment Data and Medicare Data on Provider Practice and Specialty in 2013-2019, we extracted nonintegrated medical/hematologic oncologists (hereafter oncologists) in 2013 and followed them through 2019.

Subclinical association of aortic stiffness with cardiac structure and function in African-Americans: The Jackson Heart Study.

Cardiovascular disease (CVD) morbidity and mortality are high among black adults. We aimed to study the granular subclinical relations of aortic stiffness and left ventricular (LV) function and remodeling in blacks, in whom limited data are available. In the Jackson Heart Study, 1050 U.