DBP Nalbuphine Group Morphine Group T-test Pre Mean ± SD 69.200 ± 2.840 69.000 ± 1.835 0.265 0.793 Post Mean ± SD 71.450 ± 2.704 87.450 ± 4.925 -12.734 <0.001 Difference Mean ± SD -2.250 ± 4.038 -18.450 ± 5.125   Paired t-test t -2.492 -16.101 P-value 0.022 <0.001

Table 6: Mean diastolic blood pressure in pre and postoperative periods in both groups.