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Table 2 Bilateral hippocampal dosimetric parameters

From: Improved hippocampal dose with reduced margin radiotherapy for glioblastoma multiforme

  Standard margin Reduced margin    
Parameter Mean St. Dev. Mean St. Dev. Difference (Gy) (%) p-value
Max dose (Gy) 61.4 1.4 56.1 8.6 5.3 8.7% 0.014
Mean dose (Gy) 41.9 9.1 29.9 11.6 12.0 28.7% <0.001
Median dose (Gy) 45.2 17.2 27.9 15.6 17.2 38.2% <0.001
D2% (Gy) 59.9 5.1 53.4 12.1 6.4 10.7% 0.008
D20% (Gy) 57.6 8.5 46.1 16.8 11.5 20.0% 0.001
D40% (Gy) 49.9 14.9 36.5 19.6 13.4 26.9% <0.001
D60% (Gy) 32.7 13.5 18.7 10.9 14.0 42.9% <0.001
D80% (Gy) 27.3 12.1 15.3 10.0 12.0 44.0% <0.001
D98% (Gy) 20.7 9.3 11.8 7.7 8.9 42.9% <0.001