Table 1 Descriptive table of clinical trials included in the meta-analysis.

From: Differential power of placebo across major psychiatric disorders: a preliminary meta-analysis and machine learning study

 

MDD (N = 51; total sample 17,621)

SCZ (n = 30; total sample 7869)

BD (n = 27; total sample 6545)

Mean

Std

Min

Max

Mean

Std

Min

Max

Mean

Std

Min

Max

N placebo

153.23

81.67

5

300

119.21

51.59

19

208

112.26

73.72

7

230

Randomization (intervention/placebo)

1.08

0.47

0.32

4.20

1.00

0.30

0.34

2.27

1.03

0.32

0.20

2.01

Age intervention mean

40.94

12.96

12.60

72.89

39.29

7.99

15.4

50.1

38.50

9.48

11.7

49.3

Age placebo mean

41.30

12.55

12.60

73.02

38.70

8.53

15.4

48

38.56

9.39

11.8

46.6

Sex ratio intervention (M/F)

0.78

0.66

0

4.50

2.25

1.48

0.70

8

0.95

0.38

0.40

2.00

Sex ratio placebo (M/F)

0.70

0.35

0

2.29

1.99

0.82

0.82

4.21

0.92

0.39

0.40

2.00

Number of facilities

42.25

25.92

1

100

50.27

30.26

1

115

33.75

37.73

1

130

Time duration (weeks)

8.51

1.58

6

13

7.46

2.68

6

16

7.85

2.17

6

12

Start year

2009

2

2005

2013

2009

4

1996

2014

2008

2

2004

2012

Completion year

2011

2

2007

2016

2011

3

2002

2014

2011

2

2008

2016

Number of visits

6.03

0.83

2

14

6.41

2.94

2

13

7.11

3.35

2

21

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