The evidence (28 studies, 297957 participants) shows that intraoperative awareness occurs on average in 1 in 863 (0.12%) people who are under anesthesia.
Include studies with the following criteria:
High Risk Patients:
Include 100% High Risk Patients
Only 100% High Risk Patients
Exclude 100% High Risk Patients
Min. Year:
(leave blank to include all)
Min. Participants:
(leave blank to include all)
IOA Determination Method:
Brice
Brice Modified
Other Method
Not Specified
Age of Participants:
Child (<18yr)
Adult (18yr+)
Not Specified
Recalculate
#
Study
Year
Patients
Events
1
Hutchinson
1961
656
8
2
Wilson
1975
490
4
3
Robinson
1987
100
2
4
Liu
1991
1000
2
5
Phillips
1993
700
8
6
Ranta
1996
303
7
7
Nordstrom
1997
1000
2
8
Dowd
1998
608
2
9
Ranta
1998
2612
10
10
Myles
2000
10811
12
11
Ghoneim
2000
180
6
12
Sandin
2000
11785
14
13
Leclerc
2001
326
2
14
Bergman
2002
8372
50
15
Wennervirta
2002
3841
4
16
Ranta
2002
929
5
17
Chaiwat
2002
802
5
18
Enlund
2002
5053
0
19
Messahel
2003
4368
0
20
Sebel
2004
19575
25
21
Myles
2004
2463
13
22
Ekman
2004
4945
2
23
THAI
2005
126078
99
24
Davidson
2005
864
7
25
Wang
2005
300
18
26
Shi
2006
2025
28
27
Lopez
2007
410
4
28
Pollard
2007
87361
6
Recalculate