Table 2.

Median age at transplantation, interval from transplantation at time of blood draw, Tacrolimus level at time of blood draw, and donor characteristics

Characteristic	Ratio ≥1 (n = 9)	Ratio <1 (n = 8)	p Value
Median age at transplantation (y) (25% and 75% interquartile range)	0.5 (0.5–0.6)	0.7 (0.6–1.4)	0.1
Median interval from transplantation at blood draw (y) (25% and 75% interquartile range)	5.0 (3.4–10.5)	5.7 (4.7–7.3)	0.5
Median tacrolimus level at time of blood draw (ng/ml) (25% and 75% interquartile range)	4.8 (1.8–5.4)	3.3 (2.8–3.9)	0.4
Subjects with a maternal donor	2	6	NA

NA, not applicable (too small for any meaningful statistics).