Study	Reason for exclusion
Affas 2011	Comparison of two regional techniques with no control group; insufficient follow‐up
Allen 1998a	Insufficient follow‐up (2 days)
Allen 1998b	Insufficient follow‐up (24 hours)
Andersen 2008	Insufficient follow‐up (48 hours)
Andersen 2013	Comparison of two regional techniques
Baranović 2011	Insufficient follow‐up (24 hours)
Biboulet 2004	Insufficient follow‐up (24 hours)
Borghi 2002	Insufficient follow‐up (24 hours)
Bozkurt 2009	Insufficient follow‐up (72 hours)
Capdevila 1999	The study included participants who underwent both total knee replacement and knee ligament reconstruction. Despite several requests, we could not obtain the original data to use only the results of the participants having undergone a TKR
Chan 2013	Abstract only. Results could not be obtained from the authors
Chelly 2001	Insufficient follow‐up (5 days)
Chloropoulou 2013	Insufficient follow‐up (24 hours)
Cucereanu Badica 2010	Abstract only. Insufficient follow‐up (48 hours)
Divella 2012	Insufficient follow‐up (3 days)
Hoffmann‐Klefer 2008	Insufficient follow‐up (48 hours)
Ilfeld 2009	All participants received regional analgesia for the first 24 hours, and were then administered placebo or local anaesthetic depending on their group assignment. Thus, there was no real comparison of regional analgesia vs. non‐regional analgesia.
Ilfeld 2011	All participants received regional analgesia for the first 24 hours, and were then administered placebo or local anaesthetic depending on their group assignment. Thus, there was no real comparison of regional analgesia vs. non‐regional analgesia.
Kampe 2001	Insufficient follow‐up (32 hours)
Lang 1999	Letter to the editor commenting on Allen 1998b
Lee 2012	Insufficient follow‐up (48 hours)
Looseley 2013	Insufficient follow‐up (6 weeks). Abstract only
Marino 2009	Insufficient follow‐up (48 hours)
McCarthy 2011	Abstract only, not published as article. Follow‐up of 48 hours, therefore data was not sought out.
Mejia‐Terrazas 2007	Insufficient follow‐up (48 hours)
Mistraletti 2006	Comparison of two regional techniques; insufficient follow‐up
Nigam 2011	Not a regional analgesia technique
Ning 2009	Unable to obtain article; however, from abstract, comparison of 2 regional techniques and insufficient follow‐up (24 hours)
Perrier 2010	Insufficient follow‐up (48 hours); participants undergoing surgery for hip fracture rather than elective joint replacement
Reinhardt 2014	Comparison of intra‐articular infusion of local anaesthetic vs. epidural plus femoral nerve block. Insufficient follow‐up (24 hours)
Singelyn 1999	Non‐randomized; 48‐hour follow‐up
Singelyn 2005	Insufficient follow‐up (48 hours)
Sites 2004	Insufficient follow‐up (24 hours)
Souron 2003	Insufficient follow‐up (48 hours)
Taicher 2010	Abstract only; retrospective review
Tang 2010	Insufficient follow‐up (48 hours)
Tang 2010b	Insufficient follow‐up (48 hours)
Wang 2002	Insufficient follow‐up (until discharge)
Williams 2013	Intra‐articular infusion of local anaesthetic at a low rate (2 mL/h), insufficient to affect postoperative pain scores or morphine use
Wylde 2015	For patients in the total knee replacement group, the comparison was between two regional techniques. Range‐of‐motion data was collected but not published. For patients in the total hip replacement group, only pain and quality‐of‐life data were collected.