The document discusses the performance of an online physician in determining whether to refer patients to the emergency department (ED). It provides the results of the online physician's referrals compared to what decisions should have been made. The online physician had a sensitivity of 82.85%, specificity of 96.1%, positive predictive value of 90.62%, and negative predictive value of 92.59% in determining whether a patient required referral to the ED.

30. The
• Qu

38. Should have been referred
to ED
Should not have
been referred to ED
ED Referral, Yes (by the
online physician) 87 TP 9 FP
ED Referral, No (by the
online physician) 18 FN 225 TN
Sensitivity = TP/(TP + FN) = 87/105 = 82.85%
Specificity = TN/(FP + TN) = 225/234 = 96.1%
PPV = TP/(TP + FP) = 87/(87+9) = 90.62%
NPV = TN/(TN + FN) = 225/(225+18) = 92.59%