In the context of ICUs participating in a national registry, applying a multifaceted activating performance feedback strategy did not lead to better patient outcomes than only receiving periodical registry reports. The extent to which the intervention was implemented in daily practice varied considerably among intervention ICUs: the average monthly time investment per quality improvement team member was 4.1 hours (SD,2.; range, 0.6–8.1); the average number of monthly meetings per quality improvement team was 5.7 (SD, 4.5; range, 0–12). ICU length of stay did not reduce significantly after 1 year in intervention units compared with controls (hazard ratio, 1.02 [95% CI, 0.92–1.12]).

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