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Table 1 The difference between the NFSD group and disease-free group using t test

From: Risk factors for non-fusion segment disease after anterior cervical spondylosis surgery: a retrospective study with long-term follow-up of 171 patients

  NFSD group(n = 16) Disease-free group(n = 155) P value
Age at operation (years) 51.06 ± 7.15 50.56 ± 9.92 0.844
Preoperative alignment (degrees) 7.75 ± 3.44 9.32 ± 3.79 0.113
Postoperative alignment(degrees)* 8.38 ± 4.57 17.30 ± 4.43 0.000
Pavlov’s ratio (C5) 0.84 ± 0.08 0.83 ± 0.09 0.597
Number of levels fused* 1.69 ± 0.79 2.26 ± 0.77 0.005
Scores of disc degeneration in non-fusion segments* 2.25 ± 1.13 1.52 ± 0.94 0.004
  1. Note: * for the difference was statistically significant (P < 0.05)