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biased results toward the null by overestimating control group mortality and powering for unrealistic treatment effects. Clinically important treatment effects often cannot be excluded. Overnight physician staffing in the ICU has been recommended by the Society of Critical Care Medicine and the Leapfrog Consortium. We conducted a survey to review practice in the current era and to compare this with results from a 2006 survey. Cross-sectional survey. Canadian adult ICUs. ICU directors. None. A 29-question survey was sent to ICU directors