Figure 2. Age at Onset by Sex and Carriers of ABCA4 Allele.

Horizontal lines and error bars represent the median with the interquartile range. No difference in age at onset was observed between men and women in any of the 3 subgroups (ie, biallelic patients not carrying a known mild allele, patients carrying the c.5882G>A allele, and patients carrying the c.5603A>T allele).