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J Am Med Inform Assoc 17:519-523 doi:10.1136/jamia.2010.004200
  • Research paper

Community annotation experiment for ground truth generation for the i2b2 medication challenge

Table 4

Micro-averaged F-measures of the final community ground truth against expert ground truth

Set A Set B
Phrase level Token level Phrase level Token level
Overall (horizontal) 0.924 0.927 0.903 0.904
Medications (vertical) 0.925 0.943 0.909 0.939
Dosages (vertical) 0.956 0.965 0.938 0.946
Modes (vertical) 0.965 0.958 0.945 0.926
Frequencies (vertical) 0.957 0.965 0.957 0.959
Durations (vertical) 0.649 0.709 0.613 0.645
Reasons (vertical) 0.717 0.753 0.705 0.714

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