Table 1: A comparison of preoperative and postoperative parameters in the groups.

Parameters Group 1 SIL-N N = 18 Group 2 Multi-port N = 17 P values Mann-Whitney U Test
Preoperative parameters (M ± SEM)
Age at operation (day) 94.33 ± 14.77 75.50 ± 15.71 0.319
Body weight at operation (gram) 5639.73 ± 492.90 5167.72 ± 548.11 0.562
Postoperative parameters (M ± SEM)
Operative time (min) 43.33 ± 3.61 48.33 ± 3.21 0.378
Doses of analgesia (N) 3.67 ± 0.14 3.58 ± 0.14 0.755
Length of hospital stay (hours) 3.00 ± 0.21 2.91 ± 0.19 0.799

*Notes: N-number of cases, M-mean value, SEM-standard error of mean, P-level of confident significance.