Table 4.

Kaplan-Meier 5-Year Survival Estimates for All Ages by Glioma Grade and Subtype

Grade	No.	5-y Estimated Survival (95% CI)	Subtype	No.	5-y Estimated Survival (95% CI)
I	19	100.0% (100.0%-100.0%)	Astrocytoma	18	100.0% (100.0%-100.0%)
			Not otherwise specified	1	100.0% (100.0%-100.0%)
II	20	84.2% (69.3%-100%)	Astrocytoma	9	77.8% (54.9%-100.0%)
			Oligodendroglioma and mixed oligoastrocytoma	11	90.1 (73.2%-100.0%)
III	20	40.6% (23.2%-71.1%)	Astrocytoma	16	27.8% (12.2-63.3)
			Oligodendroglioma and mixed oligoastrocytoma	4	100% (100%-100%)
IV	74	6.0% (2.1%-16.9%)	Astrocytoma	72	6.2% (2.2%-17.4%)
			Not otherwise specified	2	0.0% (0.0%-0.0%)

Data exclude 2 patients who were diagnosed at autopsy (ages 13 and 78 years, both grade IV).