Recognition of medication information from discharge summaries using ensembles of classifiers

Table 6 Statistical significance tests for differences in performance using approximate randomization in 10-fold cross-validation

	CRF	SVM	Simple Majority Voting	Local CRF-Based Voting	Local SVM-Based Voting
Customized MedEx	all, m, mo, do, f, du, r	all, m, mo, do, f, du	all, m, mo, do, f, du, r	all, m, mo, do, f, du	all, m, mo, do, f, du
CRF		do, f, du	du	all, do, du	do, f
SVM			du	du	du
Simple Majority Voting				all, do, du	du
Local CRF-Based Voting					NS

The entries in cells indicate that the two systems are significantly different in F-scores for the whole system (all), medication (m), dosage (do), mode (mo), frequency (f), duration (du), and reason (r). NS means “not significant different”. Significance is decided at p = 0.05.

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