CNTN1 and chronic inflammatory demyelinating polyradiculoneuropathy: Thus, common features between CIDP with MN and anti-CNTN1 antibody-positive CIDP are as follows (Table 3): male preponderance (about 2.5-fold higher than female), occasional acute to subacute onset (35.7 and 50%), relatively higher age of onset, distal dominant sensorimotor neuropathy with frequent proprioceptive sensory impairment leading to sensory ataxia, and high CSF protein levels.