Table A1.

Comparison of Patients With and Without Year 5 Data

Characteristic	Only Baseline		Baseline and Year 5		P
	No. of Patients	%	No. of Patients	%
Sex*					.66
Male	21	51.2	24	57.1
Female	20	48.8	18	42.9
PFS*					.76
Yes	6	14.6	5	11.9
No	35	85.4	37	88.1
Risk*					.005
High	19	46.3	7	16.7
Average	22	53.7	35	83.3
Age at baseline†					.69
Mean	11.1		10.7
SD	3.7		3.8
Age at diagnosis†					.70
Mean	11.0		10.6
SD	3.7		3.8
Social competence†					.22
Mean	50.2		52.8
SD	8.6		8.2
Withdrawn/depressed†					.02
Mean	54.0		58.0
SD	5.6		8.3
Social problems†					.23
Mean	52.7		54.1
SD	3.8		5.4

Abbreviations: PFS, posterior fossa syndrome; SD, standard deviation.

^*Fisher's exact test for equality of proportions.

^†t test for equality of means.