Is Dor fundoplication optimum after laparoscopic Heller myotomy for achalasia? A meta-analysis

Table 2 Basic characteristics of all pooled studies in the meta-analysis (Dor-other/no group)

Ref.	Patients (n)		Follow-up (mean ± SD or range)		Age (mean ± SD or range)	Type offundoplication in control group	Study design	Country
	Dor group	Control group	Dor group	Control group
Di Martino et al[13], 2011	30	26	24	24	42.8 ± 14.7	Other1	Prospective	Italy
Oelschlager et al[15], 2003	52	58	46 (1-85)	16 (1-38)	42.6 ± 15.5	Other2	Retrospective	United States
Rawlings et al[17], 2012	36	24	12	12	48.8 ± 13.0	Other2	RCT	United States
Rebecchi et al[18], 2008	72	72	125 (60-168)	125 (60-168)	49 (11-80)	Other1	RCT	Italy
Richardson et al[20], 2006	18	20	37 (2-97)	37 (2-97)	69 (15-80)	Other2	Retrospective	United States
Wright et al[24], 2007	52	63	46 ± 24	45 ± 17	42.5 (15.4)	Other2	Retrospective	United States
Dempsey et al[12], 2004	22	29	39 ± 22	26 ± 19	47.5 (12.6)	No	Retrospective	United States
Finley et al[14], 2007	71	24	6.9 ± 3.5	6.9 ± 3.5	47.9 (16-84)	No	Retrospective	Canada
Ramacciato et al[16], 2005	17	15	12	12	42.0 (14-77)	No	Retrospective	Italy
Richards et al[19], 2004	22	21	6	6	50 ± 12.7	No	RCT	United States
Richardson et al[20], 2006	18	14	37 (2-97)	37 (2-97)	69 (15-80)	No	Retrospective	United States
Simić et al[21], 2010	36	22	36	36	49.6 ± 29.2	No	RCT	Serbia
Tapper et al[22], 2008	75	99	8.4 ± 12.0	48.7 ± 34.6	47.0 ± 16.8	No	Prospective	United States
Torquati et al[23], 2006	22	21	NA	NA	50 ± 12.7	No	RCT	United States

¹Other: Nissen fundoplication;

²Other: Toupet fundoplication. NA: Not available; RCT: Random controlled trail.