Table 3

F1 scores for fivefold cross-validation performance on the OIAM training set with different sets of stopwords

Model	No removal	English	Medical	Custom	Medical+custom	English+custom	English+medical +custom
Naïve Bayes (multilabel)	0.157	0.159	0.154	0.143	0.166	0.170	0.175
Naïve Bayes (multiclass)	0.225	0.266	0.243	0.228	0.245	0.272	0.300
SVM (multilabel)	0.184	0.184	0.184	0.184	0.184	0.184	0.184
SVM (multiclass)	0.141	0.151	0.141	0.142	0.142	0.150	0.154
Nearest centroid	0.234	0.256	0.239	0.234	0.247	0.252	0.278

OIAM, One in a Million; SVM, support vector machine.