Table 3 Timing of cholecystectomy in people with ACC

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