Table 1 Characteristics of included patients between intervention and control group.

From: Effectiveness of intra-articular analgesia in reducing postoperative pain after minimally invasive sacroiliac joint fusion: a double-blind randomized controlled trial

Variable

Bupivacaine (N = 22)

Placebo (N = 19)

Age in years, mean (SD)

47 (15)

47 (12)

Sex, (% (N) female)

77.3 (17)

94.7 (18)

Body-mass-index, mean (SD) kg m−2

27.9 (6.7)

28.6 (6.9)

Diabetes (% (N) yes)

4.5 (1)

5.3 (1)

Smoking (% (N) yes)

28.6 (6)

26.3 (5)

Preoperative opioids (% (N) yes)

36.4 (8)

36.8 (7)

Oral anticoagulation (% (N) yes)

22.7 (5)

10.5 (2)

ASA classification (% (N))

 I

9.1 (2)

10.5 (2)

 II

63.6 (14)

73.7 (14)

 III

27.3 (6)

15.8 (3)

Causes of SIJ dysfunction (% (N))

 Postpartum

36.4 (8)

47.4 (9)

 Ehlers Danlos syndrome

27.3 (6)

26.3 (5)

 Prior lumbar fusion surgery

9.1 (2)

10.5 (2)

 Posttraumatic

4.5 (1)

10.5 (2)

 Other

22.7 (5)

5.3 (1)

Side (% (N), right)

68.2 (15)

47.4 (9)

  1. ASA classification American Society of Anaesthesiologists classification.
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