PMP22 and chronic inflammatory demyelinating polyradiculoneuropathy: The INCAT arm disability score of CIDP variants remained significantly (p < 0.01 and p < 0.001) higher than in the typical CIDP patients at all time points whereas the INCAT leg disability score of typical CIDP patients was significantly higher at diagnosis (p < 0.01), 24 (p < 0.001), and 36 (p < 0.01) months (Fig. 2C, D).