Table 3.

Chronic Kidney Disease-Specific Parameter Estimates of Generalized Gamma Models for Annualized Glomerular Filtration Rate Ratio by Baseline Glomerular Filtration Rate Level, Chronic Kidney Disease in Children Study, 2005–2010

	Baseline GFR Level
	≤45 mL/minute/1.73 m2			>45 mL/minute/1.73 m2
	Nonglomerular CKD (n = 212)	Glomerular CKD (n = 45)	P Valuea	Nonglomerular CKD (n = 208)	Glomerular CKD (n = 64)	P Valuea
Location: β	−0.013	0.047	0.16	−0.017	−0.036	0.54
Scale: σ	0.117	0.121	0.90	0.098	0.137	0.02
Shape: κ	0.903	3.002	0.02	0.602	1.450	0.02
95% confidence interval	0.61, 1.20	1.29, 4.71		0.37, 0.83	0.77, 2.13

Abbreviations: CKD, chronic kidney disease; GFR, glomerular filtration rate.

^aP values for the difference between nonglomerular and glomerular CKD parameter estimates.