TNNT2 and myotonic dystrophy type 1: In DM1 TA muscles, the TNNT2 expression significantly correlated with the percentage of MHC-neo positive fibers either when considering all TA muscles (Spearman test: r = 0.82, p = 0.0002) or when considering DM1-NCI (Spearman test: r = 0.64, p = 0.05) and DM1-CI (Spearman r = 0.84, p = 0.004) separately.