Disease status in chronic inflammatory demyelinating polyneuropathy: inter-centre comparative analysis and correlates

Area of Science:

• Neurology
• Clinical Electrophysiology
• Immunology

Background:

• Chronic Inflammatory Demyelinating Polyneuropathy (CIDP) exhibits variable clinical courses.
• Comparative analyses of CIDP evolution profiles between different patient cohorts are lacking.
• The correlation between CIDP disease status and objective measures of motor strength, function, and electrophysiology remains unclear.

Purpose of the Study:

• To compare the disease status evolution profiles of Chronic Inflammatory Demyelinating Polyneuropathy (CIDP) between two distinct patient cohorts.
• To investigate the relationship between CIDP disease status and clinical (motor strength, function) and electrophysiological parameters.

Main Methods:

• A simplified scale was utilized to assess disease status in two CIDP patient cohorts (Leicester, U.K., and Angers, France), totaling 72 subjects.
• Clinical and electrophysiological data from both cohorts were retrospectively analyzed.
• Disease status was independently ascertained in each cohort.

Main Results:

• Similar rates of remission, stable/improving disease, and unstable/active disease were observed in both cohorts.
• No significant correlation was found between disease status and motor strength or functional assessments.
• Median nerve compound muscle action potential amplitude emerged as the sole independent electrophysiological predictor of CIDP disease status (P = 0.046).

Conclusions:

• Disease status distribution in CIDP cohorts can serve as a valuable comparative indicator for management strategies.
• This distribution may aid in benchmarking healthcare service and treatment provision for CIDP.
• The degree of upper limb motor axonal loss, as assessed electrophysiologically, could be a useful marker for evaluating CIDP disease status.