Fig. 3.
Vitamin D levels by postoperative catecholamine requirements. Mean 25 hydroxyvitamin D levels are shown for study participant groups who did (black circles) and did not receive catecholamines (white squares). Time points: t0, preoperative; t1, pediatric intensive care unit (PICU) admission; t2, 4–8 h after PICU admission; t3, morning postoperative day 1; t4, morning postoperative day 2.