Table 2.

Summary of Laboratory Predictors of Intensive Care Unit Admission, Acute Respiratory Distress Syndrome, and Mortality Identified on Meta-Regression

Outcome	No. of Studies Reporting Outcome	Risk Factor	P
ICU admission	14	Leukocytosis Increased ALT Increased AST Elevated LDH Increased procalcitonin	<.0001 .0235 .0040 <.0001 <.0001
ARDS	13	Elevated LDH	<.0001
Mortality	23	Leukocytosis Elevated LDH	.0005 <.0001

Abbreviations: ALT, alanine aminotransferase; ARDS, acute respiratory distress syndrome; AST, aspartate aminotransferase; ICU, intensive care unit; LDH, lactate dehydrogenase.