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Table 2 Baseline demographic and clinical data of the patients

From: Does isolated atlantoaxial fusion result in better clinical outcome compared to occipitocervical fusion?

AAF groupOCF groupp
Number of patients5244 
Sex (male/female)29/2319/25 
Average age (years)72.4 ± 10.178.0 ± 8.0 
Average HS (days)18.8 ± 26.516.1 ± 9.3 
BMI (kg/m2)27.2 ± 3.924.7 ± 4.6 
FU (months)
Average OT (min)139.8136.3 
Blood transfusion (n)7857 
Average PL (NPRS)2.02.9 
NDI score (%)21.437.4 
Cervical spine system
 NEON® (n) 20 
Extent of fixation
 C0–C3 (n) 12 
 C0–C4 (n) 22 
 C0–C5 (n) 7 
 C0–C6 (n) 3 
 Hypertension (n)33380.01
 CHD (n)13210.01
 Malignancy (n)69 
 T2DM (n)46 
 COPD (n)35 
 Anticoagulation (n)2122 
 Infection/hematoma (n)42 
 Screw dislocation (n)51 
 Persistent instability 2 
 Infection rate (%)7.74.5 
 Revision rate (%)17.313.6 
 Death rate (n/%)14/31.813/25 
  1. HS hospital stay, FU follow-up, OT operation time, PL pain level, NPRS Numeric Pain Rating Scale, COPD chronic obstructive pulmonary disease, CHD coronary heart disease, T2DM type 2 diabetes mellitus