Figure 2 | Genetics in Medicine

Figure 2

From: Assessing the analytic validity of molecular testing for Huntington disease using data from an external proficiency testing survey

Figure 2

Individual participant performance for repeat sizing during 2008–2010, stratified by geographical location of the participant. Each row represents an individual participant set of results, with rows in descending order by average number of samples tested per month. The fill indicates participants’ sizing performance for each allele (paired columns indicate a single challenge). Light gray indicates the sizing results are within the acceptable range (see text for definition), dark gray indicates results are outside of the acceptable range by only one repeat, black indicates outside of acceptable range by two or more repeats, and white shows distributions (samples) for which evaluation was not possible, usually because no results had been returned. (a) Results from participants located within the United States. (b) Results for international participants.

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