Table 1.

Characteristics of the (non-)participants (N = 57)

	Participants (n = 42)				Non-participants (n = 15)
	M	SD	Range	n	M	SD	Range	n
Age at study (years)	14.7	3.8	5.7–19.8	42	14.9	4.1	7.7–19.8	15
Age at start treatment (years)	6.5	3.3	1.9–16.5	42	8.1	4.4	2.2–16.8	15
Time since start treatment (years)	8.1	3.9	1.6–15.7	42	6.6	3.6	1.7–14.4	15
Duration of adjuvant treatment (years)	1.3	1.7	0.2–8.0	22	1.4	1.1	0.4–2.8	4
	n	%			n	%
Gender
Male	19	45			10	67
Female	23	55			5	33
Tumor location
Infratentorial	26	62			10	67
Supratentorial	16	38			5	33
Tumor Type
High grade	19	45			3	20
Low grade	23	55			12	80
Treatment
Surgery only	20	48			11	73
Surgery plus adjuvant therapy	22	52			4	27
Other	–	–			–	–
More specific
Surgery only	20	48			11	73
Surgery and radiation therapy	1	2			–	–
Surgery and chemotherapy	5	12			–	–
Surgery, radiation therapy and chemotherapy	16	38			4	27
More than one operation (including progression, relapses)	8	19			3	20
Age at diagnosis
≤3 years	5	12			1	7
>3 years	37	88			14	93
Respondent
Father	6	14
Mother	32	76			–	–
Both	4	10