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Macro-averaged F1 for the AutoHP (light gray), AutoHP+ NegEx (dark gray), and None (black) preprocessing procedures across comorbidities for the textual (top) and intuitive (bottom) classification tasks. The addition of NegEx only provided small improvement in performance over and above that provided by AutoHP for a few topics, which showed consistent improvements over the system having no pre-processing procedure. See ▶ for abbreviation definitions.
