Calculating confidence intervals for threshold and post-test probabilities.
We describe a method and a computer program, written in JavaScript, for calculating confidence intervals. The method uses Taylor's series to approximate the standard errors of a post-test probability and threshold probabilities and, from them, to obtain the associated confidence intervals. This method is valid if the variables of interest are stochastically independent.
Hozo
I
I
Department of Mathematics, Indiana University Northwest, Gary, IN 46408, USA.
Djulbegovic
B
B
D000328:Adult; D001062:Appendectomy / Q000401:mortality; D001064:Appendicitis / Q000097:blood / Q000175:diagnosis / Q000601:surgery; D001499:Bayes Theorem; D001772:Blood Cell Count; D003195:Computer Communication Networks; D016001:Confidence Intervals; D005260:Female; D006801:Humans; D008432:Mathematical Computing; D011237:Predictive Value of Tests; D011336:Probability; D011381:Programming Languages; D018570:Risk Assessment; D012680:Sensitivity and Specificity; D012984:Software; D012985:Software Design; D016019:Survival Analysis