Modifying effect of hospital size on the impact of antimicrobial stewardship programs for methicillin-resistant Staphylococcus aureus bloodstream infections: a nationwide claims database analysis.

29 days), this difference did not reach statistical significance (hazard ratio 0.83, 95% CI 0.65–1.07, P = 0.15).

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In the analysis of the entire hospitalization period, the interaction for total antimicrobial costs became highly significant (P for interaction < 0.01), driven by significant interaction for total injectable antimicrobial costs (P for interaction < 0.01).

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