Table 2.

The Variety of Visual Scale among Different Groups

Visual scale	WHO Grade		P-value
	Low (n=18)	High (n=20)
1	0 (0.00)	0 (0.00)	NA	0.002
2	1 (5.56)	0 (0.00)	0.474
3	3 (16.67)	0 (0.00)	0.097
4	14 (77.78)	10 (50.00)	0.101
5	0 (0.00)	10 (50.00)	<0.001

Note, In this series, there were no tumors with a visual scale of 1. Number in parentheses are percentage of tumor number