No correlation was found for age, sex, education, living alone, pretreatment symptom duration ≥ 42 days, fulfilling criteria for definite LNB pretreatment, specific clinical syndromes (solely subjective symptoms, serious pain, radiculopathy, or facial palsy), CSF cell count, OCBs ≥ 2, and positive CSF CXCL13 and Bb‐PCR. Here, CXCL13 is linked to radiculopathy.