Table 6 Pairwise comparisons of surgical difficulty scores of the five grades in the Parkland Grading Scale
PGSa Pairwise Comparisons | Z-value | p-value |
|---|---|---|
1 vs. 2 | 2807.50 | < 0.01 |
1 vs. 3 | 4219.50 | < 0.01 |
1 vs. 4 | 1802.50 | < 0.01 |
1 vs. 5 | 1537.50 | < 0.01 |
2 vs. 3 | 2959.00 | 0.070 |
2 vs. 4 | 1461.50 | < 0.01 |
2 vs. 5 | 1439.50 | < 0.01 |
3 vs. 4 | 1849.50 | 0.076 |
3 vs. 5 | 1907.50 | < 0.01 |
4 vs. 5 | 649.00 | 0.041 |