Table 3 demonstrates differences with respect to radiological findings. Correlation between tumor volume and NPI A secondary analysis investigated the relationship between tumor volume and NPI values, revealing an almost significant negative correlation (rs = −0.7; p = 0.054), indicating that larger tumor volumes tended to be associated with lower NPI scores.
These baseline characteristics are detailed in Table 1 . Pupillometry findings Pupillometry results revealed that patients with preoperative visual disturbances had a lower mean Neurological Pupil Index (NPI) of 3.8 ± 0.8 compared to those without visual disturbances, who recorded a mean NPI of 4.3 ± 0.4 (p = 0.054); however these findings did not reach statistical significance.
Conversely, patients with tuberculum sellae meningioma demonstrated pathological NPIs (mean 3.7 ± 0.2) exclusively in instances of CN III compression, while compression of the optic chiasm showed a trend towards pathological NPIs, however these findings were not statistically significant.