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Table 3 Adverse events (AE) in placebo groups compared with AEs in untreated groups

From: Rapid overview of systematic reviews of nocebo effects reported by patients taking placebos in clinical trials

Study

Review in which study is contained

Patients reporting AEs (n)

No treatment

Placebo group

Treatment group

n

N

n

N

N

N

Barrett, 2010

Mahr, 2017

18

174

23

179

29

184

Bokmand, 2013

Koog, 2014a

1

34

8

29

5

31

Vas, 2012

Koog, 2014a

6

70

5

137

1

68

Choi, 2010

Koog, 2014a

1

14

2

15

2

15

Lee, 2009

Koog, 2014a

0

12

1

12

0

12

Sertel, 2009

Koog, 2014a

0

41

0

41

0

41

Friere, 2007

Koog, 2014a

0

12

0

12

0

12

Gioia, 2006

Koog, 2014a

0

25

0

25

0

25

Cabrini, 2006

Koog, 2014a

0

16

0

16

0

16

Melchart, 2005

Koog, 2014a

1

75

0

63

2

132

Linde, 2005

Koog, 2014a

2

76

1

81

4

145

Molsberger, 2002

Koog, 2014a

0

60

0

61

0

65

Leibing, 2002

Koog, 2014a

0

40

0

45

3

40

Medici, 2002

Koog, 2014a

0

20

0

23

2

23

Ma, 2010

Koog, 2014a

0

13

0

12

0

27

Total

 

29

682

40

614

48

809

Percentage

 

4.25%

 

6.51%

 

5.93%