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The difference in verbal pain scale between the two groups.
| Low pain Scale | High pain Scale | Total | |
| Three Port | 230 (60.7%) | 53 (45.7%) | 283 |
| Four Port | 149 (39.3%) | 63 (54.3%) | 212 |
| Total | 379 | 116 |
The verbal pain scale is a scale of four grades; the average pain scale score was calculated for each patient. Grades 1 and 2 were grouped as low pain scale while grades 3 and 4 were graded as high pain scale.
