CPO staff has recently published an article using NACOR data investigating the variability in anesthestic techniques for total knee arthroplasty.
Fleischut PM, Eskreis-Winkler, J, Gaber-Baylis L, Giambrone, GP, Faggiani SL, Dutton, RP, Memtsoudis SG. Variability in anesthetic care for total knee arthroplasty using the AQI/NACOR data registry. AJMQ. 2014; 1-8.