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Table 2 Patient demographic data in double-level ACDF

From: Using a mixture of local bone dust and morselized bone as graft materials in single- and double-level ACDF

Variables Group A (n = 60) Group B (n = 59) P value
Age (year) 51.9 ± 9.0 53.8 ± 9.9 0.27
Male Gender 27/33 25/34 0.92
Hypertension 12/60 9/59 0.50
Diabetes 6/60 8/59 0.55
Smoker 16/60 12/59 0.42
Follow-up (month) 38.4 ± 13.6 35.1 ± 7.9 0.11
Segements    0.52
 C3-C5 5 2  
 C4-C6 27 28  
 C5-C7 28 29  
Kellgren Grading Standards    0.76
 0 7 5  
 1 11 13  
 2 37 34  
 3 51 46  
 4 14 20  
Operative time (min) 110.8 ± 24.2 102.7 ± 29.5 0.10
Blood loss (ml) 93.8 ± 42.1 88.5 ± 37.4 0.47
Complications 2/60 1/59 1.00
Neck VAS (point)
 Preoperative 5.7 ± 2.0 5.3 ± 2.1 0.29
 Postoperative 3.4 ± 1.7* 3.1 ± 1.8* 0.54
1 year follow-up 2.6 ± 1.5* 2.5 ± 1.6* 0.81
Final follow-up 1.9 ± 1.0* 2.0 ± 0.9* 0.57
Arm VAS (point)    
Preoperative 6.4 ± 1.9 6.7 ± 1.8 0.38
Postoperative 3.3 ± 1.6* 3.1 ± 1.5* 0.48
1 year follow-up 2.1 ± 1.2* 1.9 ± 1.1* 0.35
Final follow-up 1.8 ± 0.6* 1.7 ± 0.7* 0.40
NDI    
 Preoperative 29.9 ± 13.1 32.4 ± 12.3 0.29
 6 months follow-up 15.9 ± 10.1* 17.2 ± 11.5* 0.51
 Final follow-up 11.2 ± 7.4* 10.5 ± 6.9* 0.60
  1. VAS 10-point visual analog scale, NDI Neck Disability Index
  2. * Compared with preoperative (P < 0.05)