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Table 2 Trails characteristics

From: Quadratus lumborum block versus transversus abdominis plane block for postoperative analgesia in patients undergoing abdominal surgeries: a systematic review and meta-analysis of randomized controlled trials

Author

Research type

Location

Numbers (E/C)

Mean age (E/C)

QL block group

TAP block group

Surgery type

Follow-up

Blanco et al

RCT

UAE

38/38

30.2/31.3

0.125%bupivacaine (0.2 ml/kg)

0.125%bupivacaine (0.2 ml/kg)

Cesarean delivery

4 months

Oksuz et al

RCT

Turkey

25/25

3.13/3.02

0.2% bupivacaine (0.5 ml/kg)

0.2% bupivacaine (0.5 ml/kg)

Low abdominal surgery

5 months

Han et al

RCT

China

39/38

26.3/27.8

20 ml of ropivacaine (concentration of 0.25%)

20 ml of ropivacaine (concentrationof0.25%)

Appendectomy

2 months

Yousef et al

RCT

India

30/30

56.5/50.7

20 ml ofbupivacaine (concentration of 0.25%)

20 ml ofbupivacaine (concentration of 0.25%)

Total abdominal hysterectomy

3 months

Kumar et al

RCT

Egypt

35/35

39.2/38.4

20 ml of ropivacaine (concentration of 0.25%)

20 ml of ropivacaine (concentration of 0.25%)

Low abdominal surgery

2 months

Li et al

RCT

China

40 /40

30/31

20 ml of ropivacaine (concentration of0.375%)

20 ml of ropivacaine (concentration of0.375%)

Cesarean delivery

4 months

Zhu et al

RCT

China

30/30

51/52

20 ml of ropivacaine (concentration of 0.25%)

20 ml of ropivacaine (concentration of 0.25%)

Total abdominal hysterectomy

2 months

Baytar et al

RCT

Turkey

54/53

46.4/48.1

20 ml ofbupivacaine (concentration of 0.25%)

20 ml ofbupivacaine (concentration of 0.25%)

Laparoscopic cholecystectomy

3 months

  1. E experimental groups, C controlled groups, RCT randomized controlled trials, QL quadratus lumborum, TAP transversus abdominis plane