Davila 1999 (1)
|
< 4 days after diagnosis
|
27
|
2 months after discharge
|
36
|
Unclear
|
Gul 2013 (2)
|
< 72 h after hospital admission
|
30
|
6 to 12 weeks after initial conservative treatment
|
30
|
High
|
Gutt 2013 (3)
|
< 24 h after hospital admission
|
304
|
7 to 45 days after hospital admission2
|
314
|
Low
|
Johansson 2003 (4)
|
< 7 days of diagnosis
|
74
|
6 to 8 weeks after discharge
|
71
|
Low
|
Kolla 2004 (5)
|
< 24 h after randomisation
|
20
|
6 to 12 weeks after the acute episode subsides
|
20
|
Low
|
Lai 1998 (6)
|
< 24 h after randomisation
|
53
|
6 to 8 weeks after the acute episode subsides
|
51
|
Low
|
Lo 1998 (7)
|
< 72 h after admission
|
45
|
8 to 12 weeks after discharge
|
41
|
High
|
Macafee 2009 (8)
|
< 72 h after recruitment
|
Not stated
|
3 months after discharge
|
Not stated
|
High
|
Mustafa 2016 (9)
|
< 48 to 72 h of diagnosis
|
105
|
6 to 12 weeks after initial attack
|
105
|
High
|
Ozkardes 2014 (10)
|
< 24 h of admission
|
30
|
6 to 8 weeks after initial treatment
|
30
|
High
|
Rajcok 2016 (11)
|
< 72 h after occurrence of symptoms
|
32
|
6 to 8 weeks after acute cholecystitis
|
32
|
High
|
Roulin 2016 (12)
|
During day as soon as possible
|
42
|
6 weeks after initial diagnosis
|
44
|
High
|
Saber 2014 (13)
|
< 72 h of duration of symptoms
|
60
|
6 to 8 weeks from onset of symptoms
|
60
|
High
|
Verma 2013 (14)
|
< 72 h of admission
|
30
|
6 to 8 weeks from onset of symptoms
|
30
|
High
|
Yadav 2009 (15)
|
As soon as possible
|
25
|
6 to 8 weeks after discharge
|
25
|
High
|
Zahur 2014 (16)
|
< 24 to 48 h after hospital admission
|
47
|
6 to 8 weeks after initial conservative treatment
|
41
|
High
|