Table 2.

Variations of the Modified Majoie Classification Examined

Cholangiographic Variation	Definition	Data Type (Range)
IHD score	Modified Majoie classification (as per Table 1) applied individually to segment 1, 2, 3, 4a, 4b, 5, 6, 7, and 8 of the liver, right intrahepatic duct, and left intrahepatic duct; the worst score taken	Ordinal (0‐3)
EHD score	Modified Majoie classification (as per Table 1) applied individually to the CHD and the CBD; the worst score taken	Ordinal (0‐4)
Sum IHD‐EHD score	Sum of IHD and EHD scores	Ordinal (0‐7)
Average IHD score	Modified Majoie classification (as per Table 1) applied individually to segment 1, 2, 3, 4a, 4b, 5, 6, 7, and 8 of the liver, right IHD, and left IHD; the average taken	Noninteger (0‐3)
Average EHD score	Modified Majoie classification (as per Table 1) applied individually to the CHD and the CBD; the average taken	Noninteger (0‐4)
Sum average IHD‐EHD score	Sum of average IHD and average EHD scores	Noninteger (0‐7)