Table 8.

Measures of central tendency and spread every 24 h for total Ca/ionized Ca ratio and magnesium while on postdilution continuous venovenous hemodiafiltration with regional citrate anticoagulation (CVVHDF-RCA) Shock protocol

Variable	N	Median	IQR	Minimum	Maximum
Max tCa/iCa
First 24 h	31	2.02	1.85–2.11	1.64	2.35
25–48 h	17	2.028	1.84–2.10	1.64	2.36
49–72 h	8	1.931	1.80–2.00	1.63	2.03
73–96 h	8	1.938	1.79–2.14	1.68	2.21
Magnesium (mg/dl)
Baseline	30	2.3	2.1–2.5	1.3	3.5
24 h	27	2	1.9–2.2	1.7	2.4
48 h	17	2	1.8–2.1	1.6	2.8
72 h	8	1.85	1.8–1.9	1.7	2.1
96 h	7	1.9	1.7–2.0	1.6	2.1

IQR, interquartile range; tCa, total Ca; iCa, ionized Ca.