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Table 4 Spell checker performance measures

From: A UMLS-based spell checker for natural language processing in vaccine safety

PARAMETERS TRAINING SET n = 12, 056 TEST SET n = 8,131
  Value 95% CI Value 95% CI
   Lower Higher   Lower Higher
Sensitivity (%) 93 93 94 74 74 75
Specificity (%) 100 100 100 100 100 100
Recovery (%) 85 84 85 68 67 69
Positive Predictive Value 64 63 65 47 46 48
Regular expression transformations 1,217 (10%)    770 (9%)   
Words corrected 105 (1%)    68 (1%)   
Processing time per word (second) 0.07    0.06