Related Experiment Video
Updated: Mar 27, 2026
Inverse Probability of Treatment Weighting Propensity Score using the Military Health System Data Repository and National Death Index
Published on: January 8, 2020
Surgical Comanagement by Hospitalists Improves Patient Outcomes: A Propensity Score Analysis
Nidhi Rohatgi1, Pooja Loftus, Olgica Grujic
1*Division of General Medical Disciplines, Department of Medicine, Stanford University School of Medicine, CA†Department of Quality, Patient Safety, and Clinical Effectiveness, Stanford Health Care, CA.
Objective:
The aim of the study was to examine the impact of a surgical comanagement (SCM) hospitalist program on patient outcomes at an academic institution.
Background:
Prior studies may have underestimated the impact of SCM due to methodological shortcomings.
Methods:
This is a retrospective study utilizing a propensity score-weighted intervention (n = 16,930) and control group (n = 3695). Patients were admitted between January 2009 to July 2012 (pre-SCM) and September 2012 to September 2013 (post-SCM) to Orthopedic or Neurosurgery at our institution. Using propensity score methods, linear regression, and a difference-in-difference approach, we estimated changes in outcomes between pre and post periods, while adjusting for confounding patient characteristics.
Results:
The SCM intervention was associated with a significant differential decrease in the proportion of patients with at least 1 medical complication [odds ratio (OR) 0.86; 95% confidence interval (CI), 0.74-0.96; P = 0.008), the proportion of patients with length of stay at least 5 days (OR 0.75; 95% CI, 0.67-0.84; P < 0.001), 30-day readmission rate for medical cause (OR 0.67; 95% CI, 0.52-0.81; P < 0.001), and the proportion of patients with at least 2 medical consultants (OR 0.55; 95% CI, 0.49-0.63; P < 0.001). There was no significant change in patient satisfaction (OR 1.08; 95% CI, 0.87-1.33; P = 0.507). We estimated average savings of $2642 to $4303 per patient in the post-SCM group. The overall provider satisfaction with SCM was 88.3%.
Conclusions:
The SCM intervention reduces medical complications, length of stay, 30-day readmissions, number of consultants, and cost of care.