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Br J Ophthalmol 83:994 doi:10.1136/bjo.83.8.994a
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Vertical cup/disc ratio in relation to optic disc size

Table 12

Case detection per 1000 population using cut off values given by Barr and Nolan

Disc size True positives False positives False negatives
Independent 17.3 122.5 2.7
Dependent 18.0  75.5 2.0

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