Background: Glioblastoma (GBM) is the most common and most malignant glioma. Nonglioblastoma (non-GBM) gliomas (WHO Grades II and III) are invasive and also often fatal. The goal of this study is to determine whether sex differences exist in glioma survival.
Methods: Data were obtained from the National Cancer Database (NCDB) for years 2010 to 2014. GBM (WHO Grade IV; N = 2073) and non-GBM (WHO Grades II and III; N = 2963) were defined using the histology grouping of the Central Brain Tumor Registry of the United States. Non-GBM was divided into oligodendrogliomas/mixed gliomas and astrocytomas. Sex differences in survival were analyzed using Kaplan-Meier and multivariable Cox proportional hazards models adjusted for known prognostic variables.
Results: There was a female survival advantage in patients with GBM both in the unadjusted ( = .048) and adjusted ( = .003) models. Unadjusted, median survival was 20.1 months (95% CI: 18.7-21.3 months) for women and 17.8 months (95% CI: 16.9-18.7 months) for men. Adjusted, median survival was 20.4 months (95% CI: 18.9-21.6 months) for women and 17.5 months (95% CI: 16.7-18.3 months) for men. When stratifying by age group (18-55 vs 56+ years at diagnosis), this female survival advantage appeared only in the older group, adjusting for covariates ( = .017). Women (44.1%) had a higher proportion of methylated (O-methylguanine-DNA methyltransferase) than men (38.4%). No sex differences were found for non-GBM.
Conclusions: Using the NCDB data, there was a statistically significant female survival advantage in GBM, but not in non-GBM.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6899055 | PMC |
| http://dx.doi.org/10.1093/nop/npz019 | DOI Listing |
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