Table 1.

Characteristics of eligible trials.

Author	Year of publication	Anesthesia	Number of patients	Femoral nerve block	Local infiltration
Toftdahl K	2007	spinal anesthesia	80	continuous femoral nerve block	local infiltration
Carli F	2010	spinal anesthesia	40	continuous femoral nerve block	local infiltration
Affas F	2011	spinal anesthesia	40	continuous femoral nerve block	local infiltration
Ng FY	2012	general anesthesia	16	continuous femoral nerve block	local infiltration
Meftah M	2012	spinal anesthesia	90	combine patient-controlled epidural  analgesia and femoral nerve block	local infiltration
Moghtadaei M	2014	spinal anesthesia	40	single-injection femoral nerve block	local infiltration