Figure 4.

The modal allele length is a modifier of four measures of respiratory function and four measures of skeletal muscle power. The graphs show the relationship between modal allele length and (A) MIP, (B) MEP, (C) FVC, (D) PEF, (E) grip, (F) pinch, (G) shoulder, (H) knee and (I) ankle dorsiflexor strength, uncorrected for age, sex, height or weight. The solid line shows the logarithmic regression line for the cohort, r² and P-values are for phenotype = log(modal). Solid black triangles represent patients with an AciI-sensitive CTG repeat tract.