RT Journal Article SR Electronic T1 Ophthalmic statistics note 5: diagnostic tests—sensitivity and specificity JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 1168 OP 1170 DO 10.1136/bjophthalmol-2014-306055 VO 99 IS 9 A1 Luke J Saunders A1 Haogang Zhu A1 Catey Bunce A1 Caroline J Doré A1 Nick Freemantle A1 David P Crabb A1 This fifth note from the Ophthalmic Statistics Group illustrates the utility of measurements of sensitivity and specificity in assessing the usefulness of a test for predicting the presence of YR 2015 UL http://bjo.bmj.com/content/99/9/1168.abstract AB This is the fifth statistics note produced by the Ophthalmic Statistics Group (OSG) which is designed to be a simple guide to ophthalmic researchers on a statistical issue with an applied ophthalmic example. The OSG is a collaborative group of statisticians who have come together with a desire to raise the statistical standards of ophthalmic researcher by increasing statistical awareness of common issues.