Safety and efficacy of different transplant kidney biopsy techniques: comparison of two different coaxial techniques and needle types.

Purpose: Percutaneous ultrasound-guided renal biopsy is essential for diagnosing medical renal disorders in transplant kidneys. A variety of techniques have been advocated. The purpose of this study is to evaluate the safety and efficacy of two different coaxial techniques and biopsy devices.

Medicare Advantage: National Carriers Expand Market Share While Regional Carriers Without Affiliation Decline, 2012-23.

This study examined the evolving landscape of insurer competition in the Medicare Advantage (MA) program from both national and local perspectives. Data from the Centers for Medicare and Medicaid Services revealed that the MA market has become more concentrated. National carriers expanded their national market share significantly from 2012 to 2023, whereas the collective market share of regional carriers without affiliation to Blue Cross and Blue Shield organizations declined because of acquisitions.

Lack Of Persistent Coding In Traditional Medicare May Widen The Risk-Score Gap With Medicare Advantage.

Payments to Medicare Advantage (MA) plans are adjusted by a risk-score model that is calibrated on diagnostic and demographic data from traditional Medicare beneficiaries and then applied to MA beneficiaries. If MA plans capture more diagnostic codes than traditional Medicare, they receive payment that is higher than the amount that would be spent in traditional Medicare. Although most previous research has focused on the coding practices of MA plans, less attention has been paid to the completeness of coding in traditional Medicare.

Attributing Racial Differences in Care to Health Plan Performance or Selection.

Importance: There is increased interest in public reporting of, and linking financial incentives to, the performance of organizations on health equity metrics, but variation across organizations could reflect differences in performance or selection bias.

Objective: To assess whether differences across health plans in sex- and age-adjusted racial disparities are associated with performance or selection bias.

Design, Setting, And Participants: This cross-sectional study leveraged a natural experiment, wherein a southern US state randomly assigned much of its Medicaid population to 1 of 5 plans after shifting to managed care in 2012.

There is no horizontal gravity force in geopotential coordinates.

In response to a recent challenge to the longstanding practice in modeling large-scale circulations in the atmosphere and ocean that neglects any horizontal component of Earth's gravity-rotation force, this paper demonstrates that a coordinate transformation into geopotential coordinates has no such horizontal force. This framework should be understood as the justification for and, if warranted, the basis for making further refinements to such geophysical models.