Differentiation of Benign Angiomatous and Microcystic Meningiomas with Extensive Peritumoral Edema from High Grade Meningiomas with Aid of Diffusion Weighted MRI

Table 1

Numerical summary for the three important outcome measures by group.

Group		Mean age (Std.)	MRI values	Number of cases with available data	Mean (Std.)	Upper 95% CI	Lower 95% CI
1	22	60.0 (14.9)	CBV perfusion	13	14.5 (6.1)	18.1	10.8
			Edema index	22	3.5 (3.1)	4.8	2.1
			ADC	22	1.9 (1.0)	2.3	1.5
2	37	60.7 (15.4)	CBV perfusion	22	12.4 (4.9)	14.6	10.2
			Edema index	37	3.0 (2.8)	4.0	2.1
			ADC	37	1.1 (0.2)	1.1	1.0
3	11	63.1 (15.0)	CBV perfusion	10	10.9 (3.1)	13.2	8.7
			Edema index	11	1.4 (0.7)	1.8	0.9
			ADC	11	1.8 (0.9)	2.4	1.2

Std. is standard deviation.