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Year : 2009  |  Volume : 57  |  Issue : 3  |  Page : 217-221

Likelihood ratios: Clinical application in day-to-day practice

1 Bombay City Institute and Research Center, Mumbai, India
2 Sadhuram Eye Hospital, Hyderabad, India
3 Prime Medical Center, Dubai, UAE
4 Queensland Eye Institute; University of Queensland; Visiting Professor, L. V. Prasad Eye Institute, Hyderabad, India

Correspondence Address:
Rajul Parikh
Bombay City Eye Institute & Research Centre, 5, Babulnath Road, Mumbai, India

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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0301-4738.49397

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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.

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