PREDICTING SURVIVAL TIME OF VICTIMS OF BRAIN TUMOR WITH ASSOCIATED RISK FACTORS IN OSUN STATE, NIGERIA

Abstract

This paper assessed the length of life of patients and prognostic factors associated with the survival
of brain tumour victims in Osun State, Nigeria. Data used were taken from patients' medical records
on gender, age, status (survived or dead), admission, and discharge dates of brain tumours victims in
Uniosun Teaching Hospital Osogbo, Osun State, from 2003 to 2022. Kaplan-Meier curve showed
that < 80% of the brain tumor victims have a survival time of 210 days, there is more death in female
patients than the male and 50% of the females have a survival time of 210 days whereas the males
have no event but are censored. 15 out of 20 patients admitted survived brain tumour ailment with a
median estimate of 416 days on an average of 50%. In Categorical Variable Coding of the hazard
ratio, p-values > and the effect of age on victims is insignificant but the chances of teenagers,
youths, and adult dying compared to children are 88%, 91%, and 88% respectively while females
with a brain tumour have 88% of dying compared to the males. Overall comparison of the victim's
model coefficients is significant and best for predicting (p-value (0.006) as well as the chisquare distribution.

Keywords: Time-to-event, Brain tumour, Censoring, Kaplan Meier, Survival