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. Author manuscript; available in PMC: 2014 Jul 1.
Published in final edited form as: Am J Med Genet B Neuropsychiatr Genet. 2013 Jun 5;0(5):10.1002/ajmg.b.32176. doi: 10.1002/ajmg.b.32176

Table II. Allele Frequencies and Sex Ratios of CGG Repeat Expansions of Different Lengths.

Category Female allele frequency Male allele frequency Female:male ratio (95% CI)
Normal (≤40) 0.959 (0.956–0.963) 0.951 (0.945–0.957) 1.01 (1.00–1.02)
Light gray zone (41–44) 0.022 (0.020–0.025) 0.029 (0.024–0.034) 0.77 (0.63–0.93)
Gray zone (45–54) 0.015 (0.013–0.017) 0.016 (0.013–0.020) 0.95 (0.72–1.22)
Premutation (≥55) 0.0034 (0.0024–0.0044) 0.0034 (0.0019–0.0052) 1.05 (0.58–1.87)