Table 3. Tabular Comparisons of the Lognormal (Ln) and Normal (N) Models, as Measured by Shapiro-Wilk Goodness-of-fit Test P  Values for Surgical Procedure Time and Total Procedure Time

Data are number of procedures (% total); n = 40,076 cases, 1,580 CPT-anesthesia combinations.

CPT = current procedural terminology; Ln = lognormal.