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Br J Ophthalmol 88:57-61 doi:10.1136/bjo.88.1.57
  • Clinical science
    • Scientific reports

Variation associated with measurement of retinal vessel diameters at different points in the pulse cycle

Table 3

Sources of variation controlling for pulse point and grader

Vessel Across images SD* (% total) Measurement within images SD* (% total) Error (% total)
*SD, standard deviation estimate from mixed effect model.
Small arteriole 2.6 (53%) 1.1 (22%) 1.2 (24%)
Large arteriole 3.5 (63%) 1.0 (18%) 1.1 (20%)
Small venule 2.6 (59%) 0.6 (15%) 1.1 (26%)
Large venule 1.9 (51%) 0.8 (22%) 1.0 (27%)

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