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

Table 1 Sample Size and Power Estimates

Groups	n = 220 transfused				n = 110 transfused				n = 72 transfused
Groups	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

Abbreviations: MES-rSO₂ mesenteric regional oxygen saturation, AUC area under curve, SD standard deviation

ISSN: 1471-2431