Table 3.

Performance metrics for primary and secondary variables when comparing the clinical natural language processing system to the gold standard.

Variable	Precision (95% CI)	Recall (95% CI)	F1 value (95% CI)
Asthma (primary variable)	0.94 (0.90-0.96)	0.96 (0.94-0.98)	0.95 (0.92-0.97)
Extrinsic asthma	1.00 (0.93-1.00)	0.75 (0.63-0.85)	0.86 (0.75-1.00 )
Bronchodilation test	0.99 (0.94-1.00)	0.66 (0.58-0.74)	0.79 (0.71-0.85)
Eosinophils in blood	0.99 (0.96-1.00)	0.90 (0.84-0.94)	0.94 ( 0.90-0.97)
Gastroesophageal reflux syndrome	1.00 (0.98-1.00)	0.93 (0.88-0.96)	0.96 (0.93-1.00)
Obesity	1.00 (0.93-1.00)	0.93 (0.82-0.98)	0.96 (0.87-1.00)
Omalizumab	1.00 (0.84-1.00)	0.78 (0.58-0.91)	0.93 (0.68-1.00)
Prick test	0.95 (0.91-0.98)	0.90 (0.84-0.94)	0.92 (0.87-0.96)
Salmeterol + fluticasone	0.98 (0.91-1.00)	0.53 (0.45-0.61)	0.96 (0.60-0.76)
Total IgEa	0.64 (0.54-0.74)	0.63 (0.53-0.72)	0.64 (0.54-0.73)

^aIgE: immunoglobulin E.