However, when correcting for the total number of axons, there was no difference in the percentage of PGP+ IENF containing GAP-43 among groups (median [IQR] healthy 7.96% [23.54%], CTS pre 13.1% [26.9%], CTS post 14.6% [41.2%], Mann Whitney p = 0.872, Wilcoxon p = 0.701, Fig 1B). Here, GAP43 is linked to carpal tunnel syndrome.