Table 6. Specific Data on Four Selected Groups and Means for All Groups

Specific groups’ measurements are detailed. These measurements are used to illustrate how meaningful comparisons can be made between groups. No single measurement will allow for complete comparison. Duration of surgery influences total American Society of Anesthesiologists (ASA) units billed as seen in cases/OR site, h/OR/d, and tASA/h.

Private = private practice group; Academic = academic group; OR sites = anesthetizing sites; tASA = total ASA units; 1 h = 4 time units; Base = base units.