Variation in the Cost of Care for Primary Total Knee Arthroplasties

Derek A. Haas; Robert S. Kaplan

Article | Arthroplasty Today | March 2017

Variation in the Cost of Care for Primary Total Knee Arthroplasties

Abstract

The study examined the cost variation across 29 high-volume U.S. hospitals for delivering a primary total knee arthroplasty without major complicating conditions. Hospital and physician personnel costs were calculated using time-driven activity-based costing. Consumable supply costs, such as the prosthetic implant, were calculated using purchase prices, and post-acute care costs were measured using either internal costs or external claims as reported by each hospital. Despite having similar patient demographics as well as re-admission and complication rates, the average cost of care for total knee arthroplasty across the hospitals varied by a factor of about 2 to 1. Even after adjusting for differences in internal labor cost rates, the hospital at the 90th percentile of cost spent about twice as much as the one at the 10th percentile of cost. The large variation in costs among sites suggests major and multiple opportunities to transfer knowledge about process and productivity improvements that lower costs while simultaneously maintaining or improving outcomes.

Keywords: Cost Management; Performance Productivity; Health Care and Treatment; Health Industry;

Format: Electronic

Read Now

Citation:

Haas, Derek A., and Robert S. Kaplan. "Variation in the Cost of Care for Primary Total Knee Arthroplasties." Arthroplasty Today 3, no. 1 (March 2017): 33–37.

In 2016 the newly appointed surgeon general of the Navy launched a value-based health care pilot project at Naval Hospital Jacksonville to explore whether multidisciplinary care teams (known as integrated practice units, or IPUs) and measurement of outcomes could improve the readiness of active duty personnel and lower the cost of delivering care to them, their dependents, and local retirees. This article describes the formation of the project’s leadership structure; the selection of four conditions to be treated (low back pain, osteoarthritis, diabetes, and high-risk pregnancy); the creation of the care team for each condition; outcomes and costs measured; and the near-term changes in outcomes during the twelve-month pilot period. Patient outcomes improved for three of the four conditions. We describe factors that contributed to the project’s success. After the pilot concluded, the Navy combined the back pain and osteoarthritis IPUs into a single musculoskeletal clinical unit and established a similar IPU at another naval hospital and its clinics. The diabetes IPU was continued, but the high-risk pregnancy IPU was not. We offer several observations on the elements that were key to the success of the project, explore challenges and opportunities, and suggest that the pilot described here could be taken to greater scale in the Military Health System and elsewhere.

In 2016, the Centers for Medicare & Medicaid Services (CMS) launched its first mandatory bundled payment program, the Comprehensive Care for Joint Replacement (CJR) model, by randomizing metropolitan statistical areas (MSAs) into the payment model. The paper analyzed Medicare costs for beneficiaries undergoing lower extremity joint replacement between April 1, 2016, through December 31, 2017. The introduction of the CJR was associated with reduced Medicare Part A spending ($582 per episode, a 2.5% savings) largely through lower post-acute spending in skilled nursing facilities. The CJR hospitals had no significant differences in hospital length of stay, readmissions, complications, 30- or 90-day mortality, volume of episodes, or patient characteristics relative to the non-CJR hospitals. We conclude that mandatory bundled payments may help to change clinicians’ and facilities’ behavior without harming quality.

Article | Accounting Horizons

Reverse the Curse of the Top-5

Robert S. Kaplan

The past 40 years has seen a large increase in the number of articles submitted to journals ranked in the top-5 of their discipline. This increase is the rational response, by faculty, to the overweighting of publications in these journals by university promotions and tenure committees. The ranking factors for academic journals, however, arose for a completely different purpose, to guide the journal acquisition decisions by budget-constrained university librarians. Using journal impact factors to infer the quality of faculty members’ publications incurs a high incidence of both Type 1 errors, when we conclude incorrectly that a paper published in a top-5 journal is a high-impact paper, and Type 2 errors, when we conclude that papers (and books) not published in top-5 journals have low impact. In addition, a third type of error gets introduced as faculty pursue the research they perceive is favored by editors of top-5 journals, at the potential expense of more innovative and relevant research, perceived to be unpublishable in a top-tier journal. Accounting scholarship, in particular, has underinvested in research about innovative practices or the emerging accounting issues faced by contemporary organizations (Kaplan, 2011), likely because such research is viewed as unpublishable in top-5 journals. This gap persists despite recent scholarship that has documented how important, fundamental ideas can emerge from “use-inspired” research (see Pasteur’s Quadrant (Stokes, 1997)). The paper concludes by suggesting reforms to overcome the dysfunctional fixation on publication in top-5 journals.

Keywords: Information Publishing; Journals and Magazines; Power and Influence; Research;

Citation:

Kaplan, Robert S. "Reverse the Curse of the Top-5." Accounting Horizons 33, no. 2 (June 2019): 17–24. View Details

Cite View Details Find at Harvard

Faculty & Research

Variation in the Cost of Care for Primary Total Knee Arthroplasties

Abstract

Citation:

About the Author

More from the Author