Table 1: Characteristics of the included studies. ACLR: Anterior Cruciate Ligament Reconstruction; ACB: Adductor Canal Block; ACL; Anterior Cruciate Ligament; M: Meniscus
Study	Settings	Patients no.	Anesthesia	Type of surgery	ACB group	Control group	Nerve block time
Akkaya et al. [3]	Turkey	40(20/20)	General anesthesia	Menisectomy	Saphenous nerve block with10 ml of 0.5% levobupivacaine	Saphenous nerve block with saline	preoperative
Chisholm et al. [12]	USA	80(39/41)	Spinal anesthesia	ACLR	Saphenous nerve block with10 ml of 0.5% bupivacaine	Femoral nerve block with with30 ml of 0.25% bupivacaine	preoperative
El-Ahl [23]	UAE	128(64/64)	General anesthesia	ACLR	5% Saphenous nerve block with 15 ml of ropivacaine	Femoral nerve block 15 ml of ropivacaine 5%	postoperative
Espelund et al. [21]	Denmark	50(25/25).	General anesthesia	ACLR	Adductorcanal-block with 30 ml ropivacaine 7.5 mg/ml	Adductor-canal-block with 0.9% saline	postoperative
Espelundetal [20, 22]	Denmark	72 (36/36)	General anesthesia	Minor arthroscopic knee surgery	Adductor canal block with 30 ml ropivacaine 7.5 mg/ml	Adductor canal block with 30 ml 30 ml isotonic saline	postoperative
Espelund et al S. pain. [22]	Denmark	50(25/25)	General anesthesia	Severe pain after arthroscopic knee surgery	Adductor canal block with 30 ml ropivacaine 7.5 mg/ml	Adductor canal block with 30 ml 30 ml isotonic saline	postoperative
Hanson et al. [2]	USA	50(25/25)	General anesthesia	Medial menisectomy	Adductor canal block with 15 mL ropivacaine 0.5%	Sham subcutaneous injection of sterile saline	Preoperative
Hsu et al. [4]	USA	68(34/34)	General anesthesia	Menisectomy, M. repair, synovial debridement, microfracture	Infrapatellar branch of the saphenous nerve block with10 ml 0.25% bupivacaine/div>	Infrapatellar branch of the saphenous nerve block with10 isotonic saline	PreoperativeNerve block time
Westergaard et al. [19]	Denmark	59(29/30)	General anesthesia	Day-case knee arthroscopy	Saphenous nerve block with ropivacaine 7.5 mg/mL	Saphenous nerve block with isotonic saline	Preoperative
Lundblad et al. [1]	Sweden	64(31/33)	General anesthesia	ACL repair	Infrapatellar nerve block with10 ml of 0.5% levobupivacaine	sham infrapatellar nerve block with10 ml isotonic saline	Preoperative