People: Staff Scientists

Biostatistician 2, Med/Quantitative Sciences Unit


  • Effect of Medicare's Nonpayment Policy on Surgical Site Infections Following Orthopedic Procedures. Infection control and hospital epidemiology Kwong, J. Z., Weng, Y., Finnegan, M., Schaffer, R., Remington, A., Curtin, C., McDonald, K. M., Bhattacharya, J., Hernandez-Boussard, T. 2017: 1-6


    OBJECTIVE Orthopedic procedures are an important focus in efforts to reduce surgical site infections (SSIs). In 2008, the Centers for Medicare and Medicaid (CMS) stopped reimbursements for additional charges associated with serious hospital-acquired conditions, including SSI following certain orthopedic procedures. We aimed to evaluate the CMS policy's effect on rates of targeted orthopedic SSIs among the Medicare population. DESIGN We examined SSI rates following orthopedic procedures among the Medicare population before and after policy implementation compared to a similarly aged control group. Using the Nationwide Inpatient Sample database for 2000-2013, we estimated rate ratios (RRs) of orthopedic SSIs among Medicare and non-Medicare patients using a difference-in-differences approach. RESULTS Following policy implementation, SSIs significantly decreased among both the Medicare and non-Medicare populations (RR, 0.7; 95% confidence interval [CI], 0.6-0.8) and RR, 0.8l; 95% CI, 0.7-0.9), respectively. However, the estimated decrease among the Medicare population was not significantly greater than the decrease among the control population (RR, 0.9; 95% CI, 0.8-1.1). CONCLUSIONS While SSI rates decreased significantly following the implementation of the CMS nonpayment policy, this trend was not associated with policy intervention but rather larger secular trends that likely contributed to decreasing SSI rates over time. Infect Control Hosp Epidemiol 2017;1-6.

    View details for DOI 10.1017/ice.2017.86

    View details for PubMedID 28487001

Data Engineer Lead, SoM - IRT Research Technology


  • A natural language processing algorithm to measure quality prostate cancer care Journal of Clinical Oncology Hernandez-Boussard, T., Kourdis, P., Dulal, R., Ferrari, M., Henry, S., Seto, T., McDonald, K., Blayney, D. W., Brooks, J. D. 2017; 35 (8_suppl): 232-232