Table 4.
aNuclear grade data were not available for all patients.
Abbreviations: CI, confidence interval; ERK-2, extracellular signal–related kinase 2; MEK-1, MAPK/ERK kinase 1; PEA-15, phospho-enriched protein in astrocytes; pPEA-15, phosphorylated PEA-15; pMAPK, phosphorylated mitogen-activated protein kinase; TSC-2, tuberous sclerosis protein 2.