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Table 1 Patient demographic data in single-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 = 51) Group B (n = 58) P value
Age (year) 48.1 ± 7.2 48.7 ± 8.5 0.73
Male gender 21/30 29/29 0.36
Hypertension 8/51 7/58 0.58
Diabetes 4/51 6/58 0.91
Smoker 11/51 9/58 0.45
Follow-up (month) 36.7 ± 11.3 34.8 ± 6.2 0.27
Segements    0.10
 C3/C4 8 3  
 C4/C5 9 13  
 C5/C6 18 30  
 C6/C7 16 12  
Kellgren Grading Standards    0.74
 0 4 3  
 1 4 8  
 2 12 15  
 3 23 21  
 4 8 11  
Operative time (min) 79.5 ± 20.6 74.7 ± 18.5 0.20
Blood loss (ml) 62.4 ± 36.9 56.8 ± 31.5 0.40
Complications 1/51 1/58 1.00
Neck VAS (point)
 Preoperative 5.4 ± 2.2 4.9 ± 1.8 0.20
 Postoperative 3.1 ± 1.9* 2.7 ± 2.0* 0.29
 1 year follow-up 2.3 ± 1.4* 2.1 ± 1.3* 0.44
 Final follow-up 1.5 ± 0.8* 1.6 ± 1.0* 0.57
Arm VAS (point)
 Preoperative 5.9 ± 2.1 6.2 ± 2.0 0.45
 Postoperative 3.4 ± 1.8* 3.2 ± 1.6* 0.54
 1 year follow-up 2.0 ± 1.1* 2.2 ± 1.4* 0.41
 Final follow-up 1.7 ± 1.0* 1.5 ± 0.8* 0.25
NDI
Preoperative 31.2 ± 13.8 29.8 ± 11.4 0.56
 6 months follow-up 17.8 ± 12.4* 15.7 ± 11.2* 0.36
 Final follow-up 10.3 ± 6.1* 9.7 ± 7.3* 0.65
  1. VAS 10-point visual analog scale, NDI Neck Disability Index
  2. * Compared with preoperative (P < 0.05)