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. 2020 Jan 17;20:15. doi: 10.1186/s12893-020-0680-8

Table 5.

UCLA system evaluation of intervertebral space (N = 41)

Segment Isobar TTL (n = 20) Rigid (n = 21)
L2/3 1 (5.0%) 4 (19.0%)
L3/4 1 (5.0%) 0 (0.0%)

P values are based on the χ2 test. P < 0.05 indicates a statistically significant difference.