Results
Liverpool causality tool had sensitivity (SN) of 97.2% ± 2.4% and
specificity (SP) of 2.3% ± 1.57%. The positive (PPV) and negative
predictive values (NPV) were 34.1% and 61.5%, respectively. The
Naranjo scale had SN of 81.2% ± 5.69% and SP of 13.2% ± 3.56%. PPV
and NPV were 32.7% and 57.5%, respectively.