BMC Medical Informatics and Decision Making

Table 1 Descriptive statistics of lab tests

From: Using information theory to identify redundancy in common laboratory tests in the intensive care unit

	ICU day 1		ICU day 2		ICU day 3
	N	Mean [SD]	N	Mean [SD]	N	Mean [SD]
Hematocrit (%)	27,549	31.9 [5.0]	19,307	30.7 [4.4]	12,913	30.4 [4.2]
Platelet (K/μL)	27,347	218.4 [112.2]	18,710	198.8 [110.4]	12,597	196.0 [114.9]
White Blood Cell Count (K/μL)	27,187	12.3 [8.8]	18,675	12.0 [7.6]	12,579	11.8 [7.9]
Glucose (mg/dL)	27,638	139.3 [50.5]	19,167	128.4 [44.2]	12,840	129.1 [43.0]
HCO₃ (mEq/L)	27,813	24.4 [4.6]	19,077	25.0 [4.6]	12,831	25.5 [4.8]
Potassium (mEq/L)	27,792	4.1 [0.5]	19,475	4.1 [0.5]	13,048	4.0 [0.5]
Sodium (mEq/L)	27,620	138.6 [4.4]	18,881	138.7 [4.5]	12,745	138.9 [4.7]
Chloride (mEq/L)	27,352	105.5 [5.7]	18,760	105.3 [5.6]	12,647	105.0 [5.8]
Blood Urea Nitrogen (mg/dL)	27,599	25.3 [20.9]	18,867	26.2 [21.2]	12,712	28.0 [22.1]
Creatinine (mg/dL)	27,612	1.4 [1.5]	18,883	1.4 [1.5]	12,716	1.5 [1.5]
Lactate (mmol/L)	11,423	2.5 [2.0]	4533	2.2 [2.3]	2861	2.1 [2.2]

The number of adult ICU admissions with at least one measurement (N), as well as the mean and standard deviation (SD) of daily median values from individual ICU admissions are shown for the first 3 days in the ICU

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