Patient Data
Patient records were examined for relevant demographic and clinical
data. Demographic and socioeconomic characteristics that were extracted
included age, sex, family income, city of origin, distance from INCA,
maternal age, home type, maternal education level, and household
services (ie: water, sewage, electricity). Disease and treatment
information included initial symptoms, first radiological exam, surgery
location (INCA or other hospital), ventricular peritoneal shunt
placement, histology report of the tumor and cerebrospinal fluid, risk
stratification, surgical outcome, residual tumor volume, Chang modified
staging criteria (M0: non metastatic; M+: seeding to the spinal
subarachnoid space, to supratentorial compartment or out of the
cerebrospinal axis), craniospinal radiation-therapy dose (23,4 or 36Gy)
and chemotherapy regimen (Pre Irradiation Regimen, COG 9961, or Head
Start 2 modified/ICE).