Table 1 Baseline characteristics at the time of surgery
Items | Data |
|---|---|
Patients (male/female), n | 139 (35/104) |
Age, years | 66.5±1.0 |
Height, m | 1.52±0.09 |
Weight, kg | 51.1±11.6 |
BMI, kg/m2 | 21.9±3.9 |
BSA, m2 | 1.42±0.18 |
Serum albumin, g/dl | 3.7±0.5 |
Charlson comorbidity index | 1.60±0.8 |
ASA-PS | 2.3±0.5 |
Disease duration, years | 19.7±14.0 |
CRP, mg/dl | 1.11±1.33 |
Medication | |
 Biologics/JAK inhibitor, n (%) | 18 (13) |
 Methotrexate, n (%) | 57 (41) |
 Prednisolone, n (%) | 118 (84.9) |
Cervical spine lesion | |
 Spondylosis, n (%) | 26 (18.7) |
 AAS, n (%) | 92 (66.2) |
 VS, n (%) | 60 (43.5) |
 SAS, n (%) | 41 (30.0) |