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Table 2 Imaging outcomes of patients in the two groups

From: Clinical impact and imaging results after a modified procedure of ACDF: a prospective case-controlled study based on ninety cases with two-year follow-up

Variable Spread group (n = 48) None-spread group (n = 42) P Value
Height of intervertebral space, mean ± SD, mm
 Pre. 4.04 ± 1.41 3.94 ± 1.52 .754
 Post. 1w 7.59 ± 1.32 6.53 ± 1.20 < 0.01
 Post. 3 m 6.78 ± 1.28 5.92 ± 1.21 .002
 Post. 6 m 6.06 ± 1.34 5.59 ± 1.34 .094
 Post. 12 m 5.65 ± 1.18 5.34 ± 1.39 .254
 Post. 24 m 5.26 ± 1.25 5.16 ± 1.34 .724
Cage subsidence, mean ± SD, mm
 Post. 3 m 0.82 ± 0.68 0.58 ± 0.81 .127
 Post. 6 m 0.64 ± 0.77 0.34 ± 0.46 .026
 Post. 12 m 0.48 ± 0.43 0.25 ± 0.28 .005
 Post. 24 m 0.45 ± 0.47 0.17 ± 0.32 .002
C2–C7 Cobb angle, mean ± SD, °
 Pre. 6.02 ± 9.18 6.57 ± 9.25 .778
 Post. 1w 15.29 ± 8.84 10.28 ± 6.33 .004
 Post. 24 m 7.29 ± 8.66 6.24 ± 6.63 .523
Average score of unoperated intervertebral disc degeneration Pfirrmann score
 Pre. 2.58 ± 0.96 2.30 ± 0.92 0.174
 Post. 24 m 3.08 ± 0.84 2.38 ± 0.49 0.000