Table 3.

Univariate median regression analysis of kidney activity fraction

Variable	Coefficient	95% CI	P value
Age (per year)	− 0.002	(− 0.006, 0.002)	0.254
Age category
0 to < 3 years	Reference	.	.
3 to < 7 years	− 0.004	(− 0.035, 0.027)	0.795
7 to < 13 years	− 0.014	(− 0.054, 0.026)	0.487
≥ 13 years	− 0.027	(− 0.09, 0.036)	0.393
Weight (per 5 kg)	− 0.004	(− 0.008, 0.001)	0.087
Sex
Male	Reference	.	.
Female	0.067	(0.038, 0.096)	< 0.001*

Quantile regression on the median (median regression) was used to determine the univariate associations between each variable and kidney activity fraction.

*Statistically significant