RT - Journal TY - JOUR A1 - Parikh, Rajul A1 - Parikh, Shefali A1 - Arun, Ellen A1 - Thomas, Ravi T1 - Likelihood ratios: Clinical application in day-to-day practice YR - 2009/5/1 JF - Indian Journal of Ophthalmology JO - Indian J Ophthalmol SP - 217 OP - 221 VO - 57 IS - 3 UL - https://journals.lww.com/ijo/pages/default.aspx/article.asp?issn=0301-4738;year=2009;volume=57;issue=3;spage=217;epage=221;aulast=Parikh;t=5 DO - 10.4103/0301-4738.49397 N2 - In this article we provide an introduction to the use of likelihood ratios in clinical ophthalmology. Likelihood ratios permit the best use of clinical test results to establish diagnoses for the individual patient. Examples and step-by-step calculations demonstrate the estimation of pretest probability, pretest odds, and calculation of posttest odds and posttest probability using likelihood ratios. The benefits and limitations of this approach are discussed. ER -