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Retrospective Study
Copyright: ©Author(s) 2026.
World J Gastrointest Oncol. Jul 15, 2026; 18(7): 120582
Published online Jul 15, 2026. doi: 10.4251/wjgo.120582
Table 2 Analysis of bowel sounds characteristics before and after surgery in different groups of patients
Variables
Total (n = 133)
No-PPOI (n = 103)
PPOI (n = 30)
Z value1
P value
Pre-operation 1 day NBS7.05 (4.29, 9.59)6.86 (4.28, 9.45)7.62 (5.14, 9.86)-0.820.415
Pre-operation 1 day BSVA49.92 (47.66, 52.33)50.08 (47.87, 52.37)49.20 (47.09, 51.82)-0.750.453
Pre-operation 1 day FBS407.56 (351.78, 452.70)415.95 (352.99, 452.76)375.37 (321.35, 439.87)-1.430.151
Operation day NBS2.41 (1.30, 3.26)2.38 (1.28, 3.23)2.48 (1.58, 3.35)-0.400.688
Operation day BSVA43.44 (41.95, 45.71)43.68 (42.12, 46.21)42.77 (41.76, 44.60)-1.460.145
Operation day FBS399.59 (351.03, 461.91)399.59 (350.22, 462.89)399.53 (356.64, 451.15)-0.370.712
RTBS19.70 (15.00, 25.30)18.10 (14.55, 24.95)23.70 (18.23, 27.10)-2.330.020
Post-operation 1 day NBS2.46 (1.18, 3.61)2.85 (1.42, 3.85)1.19 (0.69, 2.53)-3.81<0.001
Post-operation 1 day BSVA5.93 (3.42, 8.24)6.16 (3.91, 8.39)5.18 (3.05, 6.94)-1.270.205
Post-operation 1 day FBS406.38 (364.14, 451.16)406.38 (363.79, 449.21)403.31 (368.13, 460.78)-0.570.566
Post-operation 2 day NBS3.73 (2.26, 5.14)3.79 (2.71, 5.15)3.24 (1.38, 4.83)-1.730.083
Post-operation 2 day BSVA49.63 (47.85, 51.37)49.93 (48.29, 51.53)48.71 (46.50, 50.51)-2.440.015
Post-operation 2 day FBS411.17 (371.22, 456.93)409.40 (363.93, 456.14)413.56 (389.37, 462.64)-1.400.162
Post-operation 3 days NBS5.87 (3.60, 7.96)5.81 (3.51, 8.02)6.05 (4.43, 7.65)-0.380.700
Post-operation 3 days BSVA44.75 (42.23, 46.46)44.75 (42.12, 46.47)44.68 (42.53, 46.26)-0.190.853
Post-operation 3 days FBS381.25 (342.42, 448.98)391.13 (345.84, 456.54)361.53 (328.83, 424.37)-1.560.118


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