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. Author manuscript; available in PMC: 2014 Feb 26.
Published in final edited form as: Invest Ophthalmol Vis Sci. 2009 Apr 22;50(9):4080–4086. doi: 10.1167/iovs.08-3346

Table 2.

Descriptive Statistics of the Number of Affected and Unaffected Individuals in Each Group for the Association Analyses: Cardiff Dataset

Group Definition Based on Myopia Severity Affected (A) Unaffected (N) Unknown (U) Total
High-grade myopia SE data: A ≤ –5.00 D, N ≥ –0.49 D, U others 327 56 199 582
Mild to moderate myopia SE data: –4.99 D ≤ A ≤ –0.50 D, N ≥ –0.49 D, U others 130 56 396 582
Any myopia SE data: A ≤ –0.50 D, N ≥ 0 D, –0.50 D < U < 0 D 457 44 81 582
–0.75 D (Threshold used in Mutti et al.16) SE data: A ≤ –0.75 D, N ≥ 0 D, –0.75 D < U < 0 D 448 44 90 582

Classification of the dataset was based on myopia severity using spherical equivalent refractive data. D, diopters; SE, spherical equivalent refractive data; A, affected; N, unaffected; U, unknown.