TABLE 1.

Criteria for classification of patients with anaplastic astrocytoma to a Radiation Therapy Oncology Group recursive partitioning analysis (RTOG RPA) classification

RTOG RPA Classification	Criteria for assignment to classification
	Age	Mental status	KPS	Duration of symptoms prior to diagnosis
1	< 50 years	Normal
2	≥ 50 years		≥ 70	> 3 months
3	< 50 years	Abnormal
4	≥ 50 years		≥ 70	≥ 3 months
5	≥ 50 years	Normal	< 70
6	≥ 50 years	Abnormal	< 70

RTOG RPA = Radiation Therapy Oncology Group recursive partitioning analysis; KPS = Karnofsky performance status.