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Br J Ophthalmol 89:36-39 doi:10.1136/bjo.2004.044305
  • Clinical science
    • Extended reports

Epidemiology of the optic nerve grey crescent in the Reykjavik Eye Study

Table 3

 Peripapillary atrophy by age and right eye (PPA by grades, right eyes)

Age (years) Number at risk Prevalence (n) % Prevalence (95% CI) Grade 1 Grade 2 Grade 3 Grade 4
Sexes combined
50–59 351 202 58% (52 to 63) 42% 14% 2% 1%
60–69 347 217 63% (57 to 68) 43% 13% 6% 1%
70–79 242 174 72% (66 to 78) 45% 19% 6% 1%
80+ 71 60 85% (76 to 93) 39% 24% 17% 4%
Total 1011 653 65% (63 to 69)

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