Table 3.

Number of biopsies of different tumor types used in the analysis of each variable.

	IDH mutation	Fluorescence visibility	5-ALA dose	Margin type	Tumor type
	Yes | No	None | Weak | Strong	Single | Double	ST | IZ | RABT
Pilocytic Astrocytoma	–	3 | 0 | 0	3 | 2	–	5
Diffuse Astrocytoma	52 | 0	39 | 6 | 7	37 | 15	–	52
Anaplastic Astrocytoma	24 | 0	3 | 1 | 20	–	0 | 0 | 10	34
Glioblastoma	0 | 123	11 | 9 | 116	–	124 | 57 | 74	393
Oligodendroglioma	21 | 0	11 | 6 | 4	17 | 4	–	21
Ganglioglioma	–	2 | 2 | 0	–	–	4
Anaplastic Oligodendroglioma	4 | 0	0 | 4 | 0	–	–	4

The numbers result from the availability of the data. Each biopsy yielded, on average, 481 spectra (250 to 740 interquartile range). Respective administrations of a single dose (n = 10, 20 mg/kg b.w.) and a double dose (n = 13, 40 mg/kg b.w.) of 5-ALA were carried out.