<prompt> Receiver operator characteristic ROC curve is usually drawn between -Sensitivity and 1- specificity1- sensitivity and specifivitySensitivity and specificity1- sensitivity and 1-specificity  <response>: Ref:Parks 23rd edition X-axis : 1-specificity Y-axis : Sensitivity. Receiver operator curve is used to find out the cutoff Cutoff nearest to the ideal line is considered to be the best cutoff. 