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

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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.

Kurt Meyer, chief risk officer of Swissgrid, the Swiss national electricity transmission system operator, reflects on the risk management system he installed after the deregulation and liberalization of the European energy market. With 41 connections to other European networks, a failure in Swissgrid’s network could interrupt the supply of electricity in Switzerland and much of Europe. Meyer describes the periodic interactive risk workshops conducted at each business unit to identify, assess, and mitigate risks. Executive Risk Workshops of the CEO and the company’s leadership team discuss the business units’ risk profiles and risks that cut across the units, such as safety, weather, and regulatory changes. New and emerging risks are discussed at Extraordinary Risk Workshops. Meyer recently deployed an app on employees’ smartphones for them to easily report anomalies or concerns. Reports from the app are embedded in a new real-time crisis management platform used by several Swiss companies, federal authorities, and the Swiss Army. Despite a full array of risk management tools and processes, Meyer remains concerned about risks yet to be identified.

Working Paper | HBS Working Paper Series | 2018

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 an 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." Harvard Business School Working Paper, No. 19-052, October 2018. View Details

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This note was written to provide students with fundamental concepts and methods for the analysis of cost variances. It focuses on the decomposition of cost variances into price, quantity, and mix variance components, an approach that allows students to identify the root causes of differences between expected and actual costs.

Faculty & Research

Variation in the Cost of Care for Primary Total Knee Arthroplasties

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