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By appraising all nonrandomized studies using the ROBINS-I V2 (Risk Of Bias In Non-randomized Studies of Interventions, version 2) and finding them at critical risk of confounding, we restricted the synthesis to randomized trials. Stress ulcer prophylaxis (SUP) showed no demonstrated benefit; the previously reported mortality signal was not reproduced, and an exploratory signal of increased central line-associated bloodstream infection could not be excluded. With very low overall certainty, current evidence is insufficient to support routine SUP. |