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Table 2 Comparison of anterior blood loss, duration of surgery, anterior incision length, postoperative anal exhaust time, and sinus tract formation in the two groups (\( \overline{x} \)±s)

From: A comparative study to evaluate the feasibility of preoperative percutaneous catheter drainage for the treatment of lumbar spinal tuberculosis with psoas abscess

Groups Cases (n) Intraoperative blood loss (ml) Duration of surgery
(minutes)
Incision length
(cm)
Anal exhaust
time (hours)
Sinus tract
formation (n)
A 36 156.3 ± 24.7 67.6 ± 13.2 11.7 + 2.6 22.3 ± 5.12 1
B 32 206.5 ± 39.2 105.7 ± 16.3 20.3 + 2.9 30.3 ± 5.69 5
Statistic   t = 8.875 t = 3.280 t = 9.058 t = 5.013 χ2 = 7.696
P value   0.005 0.003 0 0.017 0.002