PD group | Non-PD group | p value | |
---|---|---|---|
Operation time (min.) median, [IQR] | 214.0 [100.0] | 237.0 [130.5] | 0.4193 |
Intraoperative blood loss (ml) median, [IQR] | 450.0 [627.0] | 402.0 [575.5] | 0.2761 |
Perioperative complication [complication/ no complication] (N of patients) | 10/16 | 45/251 | 0.0063 |
Local kyphosis angle (°) median, [IQR] | |||
Preop. | 27.0 [21.0] | 26.0 [19.0] | 0.9965 |
Postop. | 6.0 [18.0] | 8.0 [13.4] | 0.8072 |
Final | 18.7 [18.0] | 14.0 [18.0] | 0.3357 |
Amount of kyphosis correction | 10.8 [26.1] | 10.0 [16.0] | 0.6611 |
Mechanical failure (%) | 26.9 | 17.9 | 0.7464 |
JOA score improvement rate (%) median, [IQR] | 50.0 [38.5] | 53.8 [39.2] | 0.1074 |
Walking ability (N of patients) | |||
Preop. | Grade1: 2 | Grade1: 16 | 0.1030 |
Grade 2: 1 | Grade 2: 44 | ||
Grade 3: 4 | Grade 3: 86 | ||
Grade 4: 19 | Grade 4: 150 | ||
Final | Grade1: 3 | Grade1: 114 | 0.0007 |
Grade 2: 5 | Grade 2: 92 | ||
Grade 3: 12 | Grade 3: 70 | ||
Grade 4: 6 | Grade 4: 19 | ||
Subsequent vertebral fracture (%) | 38.4 | 35.1 | 0.7338 |