Objective: One or more inexcitable motor (IM) nerves are common during electrodiagnostic (EDx) study in Guillain-Barré syndrome (GBS). This study assessed the dose-effect relationship of IM nerves on outcome in patients with acute inflammatory demyelinating polyneuropathy (AIDP) and acute motor and/or sensory axonal neuropathy (AMAN and AMSAN).
Materials And Methods: Eighty-eight GBS patients admitted during May 2018-June 2023 underwent detailed clinical evaluation and EDx study. Admission and follow-up disability were assessed on a 0-10 Clinical Grading Scale (CGS). Outcome was recovery at 6 months, defined as good (CGS <3) and poor (CGS ≥3). Binary multivariate logistic regression with backward elimination was used to calculate independent predictors of outcome.
Results: Proportion of patients with complete recovery decreased significantly with increasing numbers of IM nerves ( < 0.01). Seventy-six patients were followed for 6 months. Among patients with IM nerves ( = 28), complete recovery was similar between AIDP and axonal GBS (70% vs. 50%, respectively; = 0.40). However, in patients with recordable compound muscle action potentials (CMAPs) in all the motor nerves ( = 26), axonal GBS had significantly poor recovery compared to AIDP (75% vs. 9.1%; = 0.01). Among patients receiving intravenous immunoglobulin (IVIg; = 42), poor recovery was seen in 53.6% with IM nerves compared to 35.7% without ( = 0.28), while it was 37.5% versus 5.6% ( = 0.04), respectively, in those who did not receive IVIg ( = 34). However, only admission disability (odds ratio [OR] 0.88, 95% confidence interval [CI] 0.81-0.97; = 0.007) was found to be an independent predictor of outcome.
Conclusion: Although increasing numbers of IM nerves were associated with poor outcome on univariate analysis, they did not predict 6 months' outcome independently. Outcome did not differ between axonal GBS and AIDP among those with IM nerves. IVIg improved outcome in patients with IM nerves.
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| http://dx.doi.org/10.4103/aian.aian_641_23 | DOI Listing |
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