Table 3. One way ANOVA for right renal mean resistive index by severity of obstruction.

	N	Mean mRI	Std. Deviation	95% Confidence Interval
				Lower Bound	Upper Bound
Grade I	15	0.7220	0.0336	0.70	0.74
Grade II	22	0.7341	0.0314	0.72	0.75
Grade III	13	0.7346	0.0161	0.72	0.74
Grade IV	9	0.6911	0.0683	0.64	0.74
Total (All subjects)	59	0.7246	0.0395	0.71	0.73