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Stress hyperlactatemia modifies the relationship between stress hyperglycemia and outcome: a retrospective observational study

journal contribution
posted on 2014-06-01, 00:00 authored by Kirsi-Maija Kaukonen, Michael Bailey, Moritoki Egi, Neil OrfordNeil Orford, Neil J Glassford, Paul E Marik, Rinaldo Bellomo
OBJECTIVE: To study the effect of stress hyperlactatemia on the association between stress hyperglycemia and mortality. DESIGN: Retrospective cross-sectional observation study. SETTING: Three ICUs using arterial blood gases with simultaneous glucose and lactate measurements during ICU stay. PATIENTS: Cohort of 7,925 consecutive critically ill patients. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: We analyzed 152,349 simultaneous measurements of glucose and lactate. We performed multivariable analysis to study the association of different metrics of glucose and lactate with hospital mortality. On day 1, first (p = 0.013), highest (p = 0.001), mean (p = 0.019), and time-weighted mean (p = 0.010) glucose levels were associated with increased mortality. A similar, but stronger, association was seen for corresponding lactate metrics (p < 0.0001 for all). However, once glucose and lactate metrics were entered into the multivariable logistic regression model simultaneously, all measures of glycemia ceased to be significantly associated with hospital mortality regardless of the metrics being used (first, highest, mean, time-weighed; p > 0.05 for all), whereas all lactate metrics remained associated with mortality (p < 0.0001 for all). In patients with at least one episode of moderate hypoglycemia (glucose ≤ 3.9 mmol/L), glucose metrics were not associated with mortality when studied separately (p > 0.05 for all), whereas lactate was (p < 0.05 for all), but when incorporated into a model simultaneously, highest glucose on day 1 was associated with mortality (p< 0.05), but not other glucose metrics (p > 0.05), whereas all lactate metrics remained associated with mortality (p < 0.05 for all). CONCLUSIONS: Stress hyperlactatemia modifies the relationship between hyperglycemia and mortality. There is no independent association between hyperglycemia and mortality once lactate levels are considered.

History

Journal

Critical care medicine

Volume

42

Issue

6

Pagination

1379 - 1385

Publisher

Lippincott, Williams & Wilkins

Location

Philadelphia, Pa.

ISSN

0090-3493

eISSN

1530-0293

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2014, the Society of Critical Care Medicine and Lippincott Williams & Wilkins