Table 1

Performance of the natural language processing (NLP) method in various kinds of data sources
Data sources Results of NLP analysis Fall-positive Fall-negative Total Sensitivity (Recall) PPV (Precision) Specificity F-measure
Positive 223 3,351 3,574
Progress notes Negative 0 209,064 209,064 1.00 0.06 0.98 0.12
Total 223 212,415 212,638
Positive 52 0 52
Incident reports Negative 0 476 476 1.00 1.00 1.00 1.00
Total 52 476 528
Positive 10 0 10
Image order entries Negative 2 19,672 19,674 0.83 1.00 1.00 0.91
Total 12 19,672 19,684
Positive 2 13 15
Discharge summaries Negative 0 1,149 1,149 1.00 0.13 0.99 0.24
Total 2 1,162 1,164

PPV means positive predictive value.

Toyabe

Toyabe BMC Health Services Research 2012 12:448   doi:10.1186/1472-6963-12-448

Open Data