Skip to main content

Table 1 Sample Size and Power Estimates

From: Does red blood cell irradiation and/or anemia trigger intestinal injury in premature infants with birth weight ≤ 1250 g? An observational birth cohort study

Groups n = 220 transfused n = 110 transfused n = 72 transfused
SD = 9 SD = 18 SD = 9 SD = 18 SD = 9 SD = 18
Difference in MES-rSO2 AUC change (%) Effect Size Power Effect Size Power Effect Size Power Effect Size Power Effect Size Power Effect Size Power
 6 0.67 1 0.33 0.69 0.67 0.93 0.33 0.41     
 8 0.89 1 0.44 0.91 0.89 1 0.44 0.64     
 10 1.11 1 0.56 0.98 1.11 1 0.56 0.82 1.11 1 0.56 0.64
 12 1.33 1 0.67 1 1.33 1 0.67 0.93 1.33 1 0.67 0.8
  1. Abbreviations: MES-rSO2 mesenteric regional oxygen saturation, AUC area under curve, SD standard deviation