Statistical methods
high-grade astrocytoma, astrocytoma
ASTROCYTOMA
The data extracted from the SEER database were first organized according to the inclusion and exclusion criteria using Excel and classified into low-grade and high-grade brain astrocytoma patients according to WHO classification. The survival rates were calculated by Kaplan–Meier curve method using R-studio 4.2.2 software for low-grade and high-grade brain astrocytoma patients, respectively. and the effect of the included factors on patient survival was demonstrated by K–M curves, and log-rank test was used for group comparisons of the same variables. The data of low-grade and high-grade astrocytoma were randomly divided into training set and validation set in a 7:3 ratio with R-studio software, and χ