Fig. 2From: Piloting I-SLEEP: a patient-centered education and empowerment intervention to improve patients’ in-hospital sleepEffect of I-SLEEP questions on overnight disruptions. Overnight disruption data for vital signs and blood draws was analyzed and dichotomized into nights with high (≥ 2) versus low (< 2) numbers of vital signs or high (≥ 1) versus low (< 1) numbers of blood draws. These levels were chosen based on median vital sign measurements in the University of Chicago hospital. Asterisk indicates p value < 0.05Back to article page