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Table 1 Participant demographic data and summary of ocular biometry

From: Correcting magnification error in foveal avascular zone area measurements of optical coherence tomography angiography images with estimated axial length

Parameters Generating and validating a relationship between AL, SE, and K Evaluating ALest in correcting magnification error
The Raine Study training dataset The Raine Study validation dataset OCTA test dataset
Number of participants 650 651 46
Number of eyes 650 651 46
Age (years), mean (range) 20 (19–22) 20 (18–22) 36 (23–69)
Gender (male:female) 340:310 333:318 18:28
Axial length (mm), mean (SD, range) 23.65 (0.95, 20.44–27.99) 23.58 (0.9, 20.84–26.77) 24.28 (1.38, 21.45–27.88)
Cylinder non-cycloplegic (D), mean (SD, range)  − 0.51 (0.52, − 3.50–0.00)  − 0.48 (0.47, − 4.75–0.00)  − 0.54 (0.78, − 4.00–1.25)
Cylinder post-cycloplegic (D), mean (SD, range)  − 0.52 (0.53, − 4.50–0.00)  − 0.48 (0.49, − 4.50–0.00) NAa
Spherical equivalent non-cycloplegic (D), mean (SD, range)  − 0.58 (1.54, − 9.13–3.38)  − 0.51 (1.43, − 9.88–7.75)  − 1.51 (2.47, − 8.00–3.25)
Spherical equivalent post-cycloplegic (D), mean (SD, range)  − 0.15 (1.62, − 8.75–5.63)  − 0.07 (1.51, − 9.75–7.88) NAa
Corneal curvature (mm), mean (SD, range) 7.76 (0.26, 7.11–8.65) 7.74 (0.26, 7.01–8.63) 7.81 (0.27, 7.24–8.64)
  1. AL = axial length; ALest = estimated axial length; D = dioptre; K = keratometry; OCTA = optical coherence tomography angiography; SE = spherical equivalent; SD = standard deviation
  2. aPost-cycloplegic SE not measured in this cohort