Table 2.

Annualized medical, pharmacy and total charges according to kidney function level in the sample of polycystic kidney disease patients^a

eGFR Level	n	Medical Charges ($)
		Total Medical			Inpatient Medical			Outpatient Pharmacy Charges ($)			Total Charges ($)
		Mean	Median		Mean	Median		Mean	Median		Mean	Median
≥90	295	24,427		5758	10,721		0	2093		714	26,521		7669
60 to 89	696	19,064		4532	8300		0	2296	c	1054	21,360		6660
30 to 59	582	27,093		6381	13,185	c	0	4154	c	1744	31,247	c	9423
15 to 29	205	38,549		7513	19,374	c	0	3257	c	1818	41,806	c	10,499
<15	135	134,784	c	42,910	37,304	c	0	5355	c	3317	140,139	c	46,779
Pb			<0.0001				<0.0001			<0.0001			<0.0001

^aCharges were adjusted to the $2008 medical component of the Consumer Price Index.

^bVariation in annualized costs by eGFR level was compared by the Kruskal-Wallis test, a nonparametric equivalent to one-way ANOVA. Pairwise comparisons of unadjusted charges in a given eGFR level versus eGFR >90 ml/min were performed by the Wilcoxon test, with statistical significance for pairwise comparisons defined as P < 0.01 (^c) based on a Bonferroni correction for multiple comparisons.