Sedation score   Mean rank Mann-Whitney Test Nalbuphine Group Morphine Group Group I Group II Z P-value T2 Range 1-2. 2-3. 12.000 29.000 -4.907 <0.001 Median(IQR) 1(1) 2.5(1) T6 Range 1-4. 2-5. 13.825 27.175 -3.763 <0.001 Median(IQR) 2(1) 4(1.75) T16 Range 2-5. 2-4. 25.300 15.700 -2.728 0.006 Median(IQR) 4(2) 3(1) T24 Range 1-2. 2-3. 14.100 26.900 -3.950 <0.001 Median(IQR) 2(1) 2(1) Friedman Test X2 52.119 22.107   P-value <0.001 <0.001 T2: 2 hours postoperative; T6: 6 hours postoperative; T16: 16 hours postoperative; T24: 24 hours postoperative

Table 4: Ramsay sedation score of patients of both groups in the post-operative period.