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. 2022 May 13;19(3):492–500. doi: 10.14245/ns.2143274.637

Table 3.

The changes in the spinal canal and ligament flavum after surgery according to subsidence (>2 mm)

Variable Preoperative
p-value Early follow-up (<5 days)
p-value Late follow-up (10–14 months)
p-value
Subsidence (–) Subsidence (+) Subsidence (–) Subsidence (+) Subsidence (–) Subsidence (+)
Spinal canal area (mm2) 77.4 ± 42.9 81.7 ± 48.8 0.740 113.2 ± 49.8 110.8 ± 48.9 1.000 162.5 ± 64.8 121.4 ± 52.7 0.184
Ligament flavum thickness (mm) 4.2 ± 1.2 4.2 ± 0.6 0.618 3.7 ± 1.0 3.6 ± 0.7 0.599 2.5 ± 0.8 2.6 ± 0.6 0.719
Ligament flavum area (mm2) 127.6 ± 38.9 111.9 ± 34.5 0.293 105.6 ± 31.0 92.5 ± 20.3 0.319 69.3 ± 29.0 72.4 ± 20.2 0.825

Values are presented as mean±standard deviation.