Patient characteristics of the development and validation cohort.

aNumber of subjects the variable was obtained.
bMean (standard deviation).
cNumber of subjects (%).
dFocal neurological deficits are defined as cranial nerve deficits, increased or decreased reflexes of arms or legs, increased or decreased tonus of arms or legs, focal convulsions and ataxia.
e(Transient) ataxia was defined as signs of ataxia, which lasted at least until discharge from the hospital, as documented in the medical records.
fP-value: independent sample t-test for continuous data; χ2-test for nominal data, or Fisher’s Exact test if the data does not meet the criteria for χ2-test.
Abbrevations: No. = number, CSF = cerebrospinal fluid.