Patient characteristics^a

	Unconfounded Cases	Posterior Fossa Tumors	P Value
Total No. of patients	60	16
Age (yr)	8.7 (6–14)	7.8 (4–10)	.095
Sex: female	30 (50.0%)	6 (37.5%)	.543
Contrast-enhanced MRIs	7 (5–9)	14.5 (11.2–16)	<.001
First-to-last MRI with contrast (yr)	3.1 (1.3–4.7)	3.4 (1.4–4.7)	.794
Accumulated dose of gadoterate dimeglumine (mL)	48.5 (31.1–87.2)	63.8 (49.8–130.5)	.161
Mean ratio change of dentate to pons	0.028 (0.007–0.049)	0.090 (0.049–0.132)	<.001
Mean ratio change of globus pallidus to thalamus	0.034 (0.013–0.055)	0.130 (0.091–0.168)	<.001

Note:—min indicates minimum; max, maximum.

^aData are presented as means with 95% confidence intervals in parentheses.