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Table 2 Comparison of radiological parameters from pre- to postoperatively

From: Hybrid surgery with PEEK rods for lumbar degenerative diseases: a 2-year follow-up study

Radiological parameters Preoperation 2-year follow-up P value
Modified Pfirrmann classification of nonfusion segment 5.0 ± 1.0 4.9 ± 1.1 0.102
DHI of nonfusion segment 0.34 ± 0.07 0.33 ± 0.05 0.233
Lordosis of nonfusion segment (°) 10.5 ± 4.3 8.3 ± 3.0 0.005
Modified Pfirrmann classification of upper adjacent segment 3.3 ± 1.2 3.4 ± 1.2 0.655
DHI of upper adjacent segment 0.34 ± 0.04 0.33 ± 0.04 0.450
Lordosis of upper adjacent segment(°) 9.3 ± 3.6 10.7 ± 3.7 0.010
Lordosis of fixed-segment (°) 27.5 ± 9.3 26.8 ± 6.4 0.612
Lordosis of fixed-segment at flexion position (°) 21.2 ± 9.2 25.3 ± 6.9 0.004
Lordosis of fixed-segment at extension position (°) 31.2 ± 9.4 27.8 ± 7.0 0.015
ROM of fixed-segment (°) 10.0 ± 3.9 2.6 ± 1.2 0.000
LL (°) 43.0 ± 14.6 44.4 ± 11.0 0.411
PI (°) 45.1 ± 9.2 45.8 ± 8.8 0.225