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Table 1 Different data filtering methods for exploratory result analysis

From: A tree based approach for multi-class classification of surgical procedures using structured and unstructured data

Filter label

Description

C

Complete dataset

\(F_1\)

Overlook small CPT difference \(\tiny {(CPT_i - CPT_j\le 10 \Rightarrow {y_{0,1}=1})}\)

\(F_2\)

Eliminate rare CPT occurrences \(\tiny {(F_{CPT_i}<4)}\)

\(F_1F_2\)

\(F_1\) & \(F_2\) \(\tiny {(F_1 \cap F_2)}\)