Safety of craniotomy for brain tumor resection in octogenarians and older patients - a matched - cohort analysis.

Introduction: The incidence of brain tumors has increased in elderly population overtime. Their eligibility to a major surgery remains a questionable subject. This study evaluated prognostic factors and 30-days morbidity and mortality in octogenarian population who underwent craniotomy for resection of brain tumor.

Materials and methods: A total of 154 patients were divided into two different groups: patients above 80 years old and patients below 65 years old. In both groups, patients were stratified based on diagnosis with benign tumors [meningioma] and malignant tumors [high-grade gliomas and metastases]. Multivariable logistic regression model with backward elimination method was utilized to identify the independent risk factors for 30-days readmission and post-operative complications.

Results: The analysis revealed no significant difference in 30-day readmission (p = 0.7329), 30-day mortality (0.6854) or in post-operative complication (p = 0.3291) between age ≥ 80 and age ≤ 65 groups. A longer length of stay (LOS) was observed in the older patients (p = 0.0479). There was a significant difference in the pre-post KPS between the two groups (p < 0.0001). ASA (p = 0.0315) and KPS (p = 0.071) were found as important prognostic factors associated with post-operative mortality in both groups.

Conclusion: Octogenarians can withstand craniotomy without any significant increase in 30-day readmission, 30-day mortality and post-operative complications as compared to patients younger than age 65. The ASA score (>3) and/or KPS (<70) were the most important prognostic factors for 30-days readmission and mortality.