Characteristics of participants and results of morphological features of olfactory nerve system.

Numerical data are presented as mean ± standard deviation (minimum-maximum)*, categorical data as numbers (n) and percent (%). The chi-square test was used for gender and independent T-test was used for numerical variables. Diagnosis of IIH=time between onset of first symptoms and enrolment in the study. Highest and last ICP=Highest and last intracranial pressure in the medical history of patients. CSF=Cerebrospinal fluid. Medication = Current intake of acetazolamide, topiramate or furosemide to treat IIH. OBV=Olfactory bulb volume. OS=Olfactory sulcus. *Numerical data of diagnosis of IIH are presented as median (range: minimum-maximum) because the data were not normally distributed.