Volume 48 | Number 2pt1 | April 2013

Abstract List

Amol S. Navathe M.D., Ph.D., Jeffrey H. Silber M.D., Ph.D., Dylan S. Small, Amy K. Rosen Ph.D., Patrick S. Romano M.D., M.P.H., Orit Even‐Shoshan M.S., Yanli Wang, Jingsan Zhu, Michael J. Halenar, Kevin G. Volpp


To examine whether hospital financial health was associated with differential changes in outcomes after implementation of 2003 duty hour regulations.

Data Sources/Study Setting

Observational study of 3,614,174 Medicare patients admitted to 869 teaching hospitals from July 1, 2000 to June 30, 2005.

Study Design

Interrupted time series analysis using logistic regression to adjust for patient comorbidities, secular trends, and hospital site. Outcomes included 30‐day mortality, Patient Safety Indicators (s), failure‐to‐rescue () rates, and prolonged length of stay ().

Principal Findings

All eight analyses measuring the impact of duty hour reform on mortality by hospital financial health quartile, in postreform year 1 (“Post 1”) or year 2 (“Post 2”) versus the prereform period, were insignificant: Post 1 range 1.00–1.02 and Post 2 range 0.99–1.02. For s, all six tests showed clinically insignificant effect sizes. The rate analysis demonstrated nonsignificance in both postreform years ( 1.00 for both). The outcomes varied significantly only for the combined surgical sample in Post 2, but this effect was very small, 1.03 (95% 1.02, 1.04).


The impact of 2003 duty hour reform on patient outcomes did not differ by hospital financial health. This finding is somewhat reassuring, given additional financial pressure on teaching hospitals from 2011 duty hour regulations.