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. Author manuscript; available in PMC: 2021 Sep 27.

Published in final edited form as: J Neurosurg Pediatr. 2020 Mar 27;26(1):13–21. doi: 10.3171/2020.1.PEDS19496

TABLE 2.

Tumor grade and associated descriptive variables

	Low- vs High-Grade Tumors			p Value
	Total	High Grade	Low Grade	p Value
No. of patients	86	10	76
Mean age at op, yrs	12.2 ± 4.5	11.7 ± 6.0	12.3 ± 4.4	0.702^*
Sex				0.501^†^‡
Female	39 (45.3)	6 (60.0)	33 (43.4)
Male	47 (54.7)	4 (40.0)	43 (56.6)
Location				0.490^†^‡
Cerebellar	14 (16.3)	2 (20.0)	12 (15.8)
Deep	39 (45.3)	6 (60.0)	33 (43.4)
Lobar	33 (38.4)	2 (20.0)	31 (40.8)
Mean pre-SLA tumor vol, cm³	8.0 ± 14.0	7.6 ± 10.3	8.1 ± 14.4	0.936^*
Mean lesion vol, cm³	8.2 ± 9.1	12.1 ± 15.0	7.7 ± 8.1	0.167^*
Post-SLA tumor vol (n = 72)				0.128^†^‡
Decreased	58 (80.6)	4 (57.1)	54 (83.1)
Unchanged/increased	14 (19.4)	3 (42.9)	11 (16.9)
Complications				>0.99^†^‡
No	63 (73.3)	7 (70.0)	56 (73.7)
Yes	23 (26.7)	3 (30.0)	20 (26.3)

Values represent the number of patients (%) unless stated otherwise. Mean values are reported as mean ± SD.

^*

t-test.

^†

Chi-square test.

^‡

Exact test.