Table 2.

Comparison of indicators related to multifidus injury before and after PE-TLIF.

n = 51	CK(U/L)	Max-CSA (mm2)	PI (db)
Preoperation	83.79 ± 4.99	520.29 ± 10.27	2.68 ± 0.11
Post-1d	452.62 ± 13.50①	—	—
Post-7d	91.23 ± 2.71②	628.20 ± 11.26①	4.55 ± 0.17①
Post-1m	—	516.74 ± 7.86②	2.91 ± 0.06②
Post-3m	—	482.29 ± 8.61②	2.53 ± 0.06②
Final follow-up	—	477.42 ± 8.80②	2.36 ± 0.08②

Note: ①Compared with preoperation, P < 0.05; ②compared with preoperation, P > 0.05.