Table 1 Demographic and medical characteristics between patients with and without PAP
| Â | Patients without PAP | Patients with PAP | Patients with CPAP^ |
|---|---|---|---|
Number of subjects | 101 | 21 | 8 |
Age range (years) | 58.5 ± 11.6 | 55.3 ± 7.0 | 52.8 ± 5.5# |
BMI | 24.1 ± 2.6 | 24.9 ± 2.9 | 25.6 ± 3.0 |
Gender (Male vs. Female) | 79 vs. 22 | 14 vs. 7 | 3 vs. 5# |
Disease duration (months) | 14.1 ± 19.2 | 18.3 ± 19.9 | 21.4 ± 22.9 |
Preoperative radiographic measurement | |||
 Cervical curvature (°) | 13.3 ± 10.9 | 13.3 ± 11.6 | 15.1 ± 13.2 |
 C7 slope (°) | 24.4 ± 7.9 | 22.8 ± 8.6 | 21.7 ± 9.9 |
 C2 SVA (mm) | 19.1 ± 16.1 | 20.7 ± 16.0 | 22.0 ± 13.9 |
Main diagnosis (n/total cases (%)) | |||
 CSM | 68/101 (67.3%) | 10/21 (47.6%) | 4/8 (50.0%) |
 Cervical OPLL | 33/101 (32.7%) | 11/21 (52.4%) | 4/8 (50.0%) |
Surgical information: | |||
 Operative time (min) | 119.3 ± 20.0 | 127.7 ± 33.1 | 130.9 ± 35.9 |
 Intraoperative bleeding (ml) | 266.3 ± 72.7 | 290.0 ± 73.4 | 314.9 ± 75.4 |
 Number of surgical segments | 4.8 ± 0.6 | 4.9 ± 0.9 | 5.0 ± 1.1 |
 Laminoplasty (n/total cases (%)) | 88/101 (87.1%) | 16/21 (76.2%) | 6/8 (62.5%) |
 Laminectomy (n/total cases (%)) | 13/101 (12.9%) | 5/21 (23.8%) | 2/8 (27.5%) |
 Surgery involves C2 (n/total cases (%)) | 7/101 (6.9%) | 8/21 (38.1%)* | 3/8 (37.5%)# |
 Surgery involves C7 (n/total cases (%)) | 69/101 (68.3%) | 12/21 (57.1%) | 5/8 (62.5%) |
Complication (n/total cases (%)) | |||
 Dura defect | 4/101 (4.0%) | 1/21 (4.8%) | 1/8(12.5%) |
 Surgical site infection | 5/101 (5.0%) | 2/21 (9.5%) | 0/8(0.0%) |
 Nerve damage | 5/101 (5.0%) | 2/21 (9.5%) | 1/8 (12.5%) |