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. 2022 Apr 22;17:247. doi: 10.1186/s13018-022-03082-9

Table 3.

Relationship between preoperative disc and facet joint status and disc degeneration

L4/5 L5S1
DHI decrease ≥ 10% (n) DHI decrease < 10% (n) F value p value DHI decrease ≥ 10% (n) DHI decrease < 10% (n) F value p value
Facet grade pre-operation 0.000 1.000 4.934 0.026*
Degeneration 8 32 9 34
No degeneration 3 11 6 5
Disc grade pre-operation 0.002* 0.964 0.006 0.937
Degeneration 8 34 12 29
No degeneration 3 9 3 10

DH, disc height; DHI, disc height index

*Test was considered statistically significant at p < 0.05