Table IV.

Estimated relative risk of relapse by high or low weight- for- age percentile subsets compared to a subset of patients with a weight between 10-89.9%ile in Wilms tumor patients less than 2 years of age at diagnosistreated on NWTS-5 (adjusted for stage and treatment)

Percentile subset	Number	Estimated relative risk of relapse	95% confidence intervals for RR	P value	Number of observed failures
Less than 5%ile	45	1.93	0.93, 4.03	0.08	9
5-9.9%ile	33	0.91	0.28, 2.99	0.87	3
10-89.9%ile	340	1.00			37
90-94.4%ile	35	0.24	0.03, 1.75	0.16	1
More than 95%ile	40	1.02	0.36, 2.87	0.97	4