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Table 2 Summary of the patient demographic data

From: Classification of three-level hybrid surgery for the treatment of cervical degenerative disc disease: a retrospective study of 108 patients

  Type I Type II ACDF p value p value
I vs. II I vs. ACDF II vs. ACDF
N 50 34 24     
Gender, na
 Male
 Female
26
24
17
17
13
11
0.952 0.857 0.861 0.755
Age, yearb 51.83 ± 6.86 48.94 ± 8.93 56.67 ± 7.93 0.001 0.098 0.013 0.000
BMIb 24.27 ± 2.92 23.29 ± 2.64 23.61 ± 3.29 0.318 0.142 0.373 0.681
Levels, na        
 C3–6 12 12 10 0.569 0.471 0.297 0.839
 C4–7 35 21 13     
 Skip 3 1 1     
Operation time, minb 165.65 ± 23.25 178.82 ± 23.06 154.58 ± 25.70 0.001 0.016 0.067 0.000
Blood loss, mlb 67.83 ± 28.04 75.00 ± 22.05 61.67 ± 23.53 0.138 0.211 0.334 0.050
FU, monthsb 29.13 ± 14.40 34.03 ± 19.74 29.13 ± 14.19 0.359 0.187 0.999 0.262
  1. ACDF anterior cervical discectomy and fusion, BMI body mass index, FU follow-up
  2. aChi-square test for the three groups
  3. bANOVA test for the three groups and SNK test for each two groups