Fig. 2From: Prevalence, incidence and carrier frequency of 5q–linked spinal muscular atrophy – a literature reviewCarrier frequency studies for SMA. The grey area represents the 95% confidence interval based on the average carrier frequency (0.019) of all individuals (except those from the isolated Muslim Israeli Arab village and the Schmiedeleut Hutterites). Small dots represent individual studies. In case studies seperated between groups, these are depicted as separate dots. Large symbols represent pooled estimates for different ethnical groupsBack to article page