Table 3 Effect of operation levels on intraoperative bleeding, immediate and final drainage in different groups with different ages
Subjects | Ages > = 60 (n = 72) | t value | P value | Ages < 60 (n = 111) | t value | P value | ||
|---|---|---|---|---|---|---|---|---|
One-level operation (n = 29) | Two–level operation (n = 43) | One-level operation (n = 54) | Two-level operation (n = 57) | |||||
Intraoperative bleeding (ml) | 350.00 ± 194.11 | 518.60 ± 262.77 | 2.952 | 0.004 | 379.81 ± 323.46 | 606.67 ± 475.22 | 2.593 | 0.004* |
Immediate drainage (ml) | 44.31 ± 62.36 | 62.79 ± 62.04 | 1.237 | 0.220 | 50.56 ± 51.08 | 63.51 ± 78.32 | 1.026 | 0.307 |
Final drainage (ml) | 173.97 ± 121.07 | 319.77 ± 328.37 | 2.284 | 0.025 | 192.96 ± 143.47 | 287.46 ± 253.22 | 2.435 | 0.017* |