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Table 3 Comparison of the average of GRV before intervention in the case and control groups in different days

From: Studying the effect of abdominal massage on the gastric residual volume in patients hospitalized in intensive care units

Variables Groups Average rating Statistical test
Average of GRV before intervention in first day Case 29.03 p = 0.514
Z = − 0.562
Control 31.97
Average of GRV before intervention in second day Case 30.45 p = 0.982
Z = − 0.022
Control 30.55
Average of GRV before intervention in third day Case 29.02 p = 0.509
Z = − 0.660
Control 31.98