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TABLE 2: 
Descriptive statistics of low-grade astrocytomas
Tumor Type*n (%)ParameterMean/SD/SE95% CI for MeanRange
PAS (I/IV)10/75 (13.33)rCBVT1.71/0.45/0.141.39–2.030.84–2.52
rCBVP0.97/0.14/0.050.87–1.070.77–1.29
DAS (II/IV)14/75 (18.67)rCBVT1.78/0.35/0.091.58–1.981.29–2.43
rCBVP1.28/0.19/0.051.17–1.391.07–1.86
  • Note.—PAS indicates pilocytic astrocytoma; DAS, diffuse astrocytoma; rCBVT, tumoral relative cerebral blood volume; rCBVP, peritumoral relative cerebral blood volume.
  • * Roman numerals in parentheses show tumor grade according to the World Health Organization 2000 classification scheme.