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Early initiation of low-dose corticosteroid therapy in the management of septic shock: a retrospective observational study

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The use of low-dose steroid therapy in the management of septic shock has been extensively studied. However, the association between the timing of low-dose steroid therapy and the outcome has not been evaluated. Therefore, we evaluated whether early initiation of low-dose steroid therapy is associated with mortality in patients with septic shock.

Methods

We retrospectively analyzed the clinical data of 178 patients who received low-dose corticosteroid therapy for septic shock between January 2008 and December 2009. Time-dependent Cox regression models were used to adjust for potential confounding factors in the association between the time to initiation of low-dose corticosteroid therapy and in-hospital mortality.

Results

The study population consisted of 107 men and 71 women with a median age of 66 (interquartile range, 54-71) years. The 28-day mortality was 44% and low-dose corticosteroid therapy was initiated within a median of 8.5 (3.8-19.1) hours after onset of septic shock-related hypotension. Median time to initiation of low-dose corticosteroid therapy was significantly shorter in survivors than in non-survivors (6.5 hours vs. 10.4 hours; P = 0.0135). The mortality rates increased significantly with increasing quintiles of time to initiation of low-dose corticosteroid therapy (P = 0.0107 for trend). Other factors associated with 28-day mortality were higher Simplified Acute Physiology Score (SAPS) 3 (P < 0.0001) and Sequential Organ Failure Assessment (SOFA) scores (P = 0.0007), dose of vasopressor at the time of initiation of low-dose corticosteroid therapy (P < 0.0001), need for mechanical ventilation (P = 0.0001) and renal replacement therapy (P < 0.0001), while the impaired adrenal reserve did not affect 28-day mortality (81% vs. 82%; P = 0.8679). After adjusting for potential confounding factors, the time to initiation of low-dose corticosteroid therapy was still significantly associated with in-hospital mortality (adjusted OR 1.025, 95% CI 1.007-1.044, P = 0.0075). The early therapy group (administered within 6 hours after the onset of septic shock, n = 66) had a 37% lower mortality rate than the late therapy group (administered after 6 hours after the onset of septic shock, n = 112) (32% vs. 51%, P = 0.0132).

Conclusions

Early initiation of low-dose corticosteroid therapy was significantly associated with decreased mortality.

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