Total 16042 D-Bil D-Bil D-Bil D-Bil D-Bil <0.3 % 0.3 % 0.4 % >0.4 % >0.3 % T-Bilirubin 0 to 0.8 11861 11607 97.9 202 1.7 39 0.3 13 0.1 52 0.4 T-Bilirubin 0.9 762 617 81.0 91 11.9 38 5.0 16 2.1 54 7.1 T-Bilirubin 1.0 586 452 77.1 66 11.3 47 8.0 21 3.6 68 11.6 T-Bilirubin 1.1 399 252 63.2 73 18.3 44 11.0 30 7.5 74 18.5 T-Bilirubin >1.1 2434 627 25.8 368 15.1 231 9.5 1208 49.6 1439 59.1 T-Bilirubin = Total bilirubin in mg/dL; D-Bil = Direct bilirubin in mg/dL

Table 7: The paired values of total and direct bilirubin were segregated according to the total bilirubin levels into the subgroups with total bilirubin up to 0.8 mg/dL (i.e. <0.9 mg/dL), total bilirubin of 0.9 mg/dL, total bilirubin of 1.0 mg/dL, total bilirubin of 1.1 mg/dL and total bilirubin of >1.1 mg/dL (i.e. total bilirubin of 1.2 mg/dL or greater). Each group was then sorted in ascending order of direct bilirubin and segregated into subgroups with direct bilirubin <0.3 mg/dL, direct bilirubin of 0.3 mg/dL, direct bilirubin of 0.4 mg/dL, and direct bilirubin of >0.4 mg/dL. A separate subgroup of direct bilirubin greater than 0.3 mg/dL was also created. The raw numbers and the numbers as a percentage of the total in each group are presented. The data support not doing direct bilirubin assay if the total bilirubin is less than 0.9 mg/Dl. T-Bil=Total bilirubin in mg/dL; D-Bil=Direct bilirubin in mg/dL