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Table 1 Drug-induced parkinsonism identified by the UPDRS as gold standard, based on blink rate

From: Blink rate is associated with drug-induced parkinsonism in patients with severe mental illness, but does not meet requirements to serve as a clinical test: the Curacao extrapyramidal syndromes study XIII

UPDRS Blink rate no casea Blink rate case Total
No case 216 347 563
Case 74 241 315
total 290 588 878
  Sensitivity: 77%, Specificity: 38%  
  Positive predictive value 75%, Negative predictive value 41%  
  1. aThe cut-off for a case is 20 blinks per minute