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Table 2 The perioperative data

From: Evaluation of efficacy and safety of percutaneous transforaminal endoscopic surgery (PTES) for surgical treatment of calcified lumbar disc herniation: a retrospective cohort study of 101 patients

 

CLDH

ULDH

p-value

Duration of operation (min)a

64.74 ± 11.82

58.83 ± 15.52

0.087

Frequency of intraoperative fluoroscopyb

6 (5–16)

5 (4–14)

0.090

Hospitalization daysb

3 (2–4)

3 (2–5)

0.777

Blood lossb

5 (2–20)

5 (5–25)

0.187

  1. aExhibited in the format of “Mean ± standard deviation” and tested by Student’s t test
  2. bExhibited in the format of “Median (Min-Max)” and tested by Mann-Whitney U test