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. 2019 Jun 17;11(3):493–499. doi: 10.1111/os.12473

Table 2.

Surgical outcomes of puncture‐channel time (minutes, mean ± SD)

Groups L3/L4 level L4/L5 level L5/S1 level
Group A 11.36 ± 2.13 13.86 ± 3.90 18.21 ± 1.85
Group B 11.29 ± 2.23 11.93 ± 2.95 15.71 ± 3.20
t value 0.079 2.291 2.476
P value 0.938 0.039 0.028