Table 1_Diagnostic spectrum and clinical outcomes of chronic inflammatory demyelinating polyneuropathy: a multicenter cohort.docx

Typical CIDP was predominant (72%), with distal, motor-predominant, and multifocal variants representing 8% each. All motor demyelinating features were upper limb predominant. Maintenance monotherapy, mainly IVIG (42%) or oral steroids (33%), was used to treat 75% of patients.

Over 55 months, meaningful improvement was achieved in 89% (INCAT) and 83% (MRCSS) with 3.7- and 11.9-point changes, respectively (p < 0.001). Relapses occurred in 42% at a mean of 11 months, mostly due to suboptimal response or non-compliance.</p>Conclusion<p>This is the first Arab multicenter CIDP study, which shows earlier disease onset than North American and European cohorts, with a similar clinical phenotype. Despite a 42% relapse rate, most patients showed meaningful improvement.

These findings provide a regional benchmark for future prospective studies.</p>