When testing for differences between the three neuropathy groups, CIDP patients had significantly larger f-CSAs compared to anti-MAG patients: for the MN overall (increase of 1.54 mm3 (95% CI, 0.13–2.95), p = 0.031), and in the antecubital fossa (increase of 3.04 mm3 (95% CI, 0.54–5.54), p = 0.017), and for the UN when measured in the midarm site (increase of 1.58 mm3, p = 0.017). Here, MAG is linked to neuropathy.