Table 1 Trial characteristics, exposure, baseline participant covariates, and outcomes across trials and treatment groups

From: Risk of weight gain for specific antipsychotic drugs: a meta-analysis

Study

Duration

Total subjects

Antipsychotic

Total exposure: median (max)

% with weight gain drugs

Age: mean (SD)

PANSS: mean (SD)

% White

% Black

% Female

Outcome: % with 7% weight gain

Baseline characteristics

1

Variable (≤11 mts)

206

Paliperidone: 50.5%

3.06 (21.30)

9.6

39 (11)

92.9 (11.2)

60

8

44

18.27

Placebo: 49.5%

0

10.8

37 (10)

94 (11.1)

60

9

37

11.76

2

6 weeks

114

Paliperidone: 66.7%

2.09 (4.50)

6.6

70 (5)

91.8 (9.7)

99

0

74

0

Placebo: 33.3%

0

2.6

69 (3)

94.3 (9)

100

0

71

2.63

3

6 weeks

627

Olanzapine: 20.1%

0.84 (1.04)

2.4

36 (11)

93 (10.7)

87

0

54

22.22

Paliperidone: 59.8%

2.46 (4.08)

2.1

37 (11)

94 (11.1)

86

0

46

10.93

Placebo: 20.1%

0

2.4

37 (11)

94.1 (10.7)

84

0

48

3.17

4

6 weeks

438

Olanzapine: 24.9%

0.56 (1.92)

13.8

40 (11)

94.9 (12.3)

42

0

19

17.43

Paliperidone: 51.1%

1.68 (3.84)

13.8

42 (10)

93.2 (11.7)

41

0

31

10.27

Placebo: 24%

0

21.9

42 (11)

93.5 (11.9)

48

0

22

5.71

5

6 weeks

614

Olanzapine: 20.7%

0.84 (0.94)

4.7

37 (10)

93.4 (12.2)

48

23

24

19.69

Paliperidone: 59.3%

2 (4.58)

11.5

37 (11)

92.6 (12.6)

49

21

36

10.99

Placebo: 20%

0

8.9

37 (11)

93.8 (12.6)

51

21

30

5.69

6a

6 weeks

316

Pali: 66.1%

3.52 (8.00)

19.6

37 (10)

94.2 (12.9)

43

22

34

6.70

Placebo: 33.9%

0

19.6

37 (11)

91.6 (12.5)

50

19

37

1.87

7a

6 weeks

310

Paliperidone: 69.4%

3.28 (4.00)

24.2

38 (9)

92.2 (13.5)

52

18

45

6.98

Placebo: 30.6%

0

28.4

38 (10)

91.7 (12)

52

18

41

1.05

8a

18 months

342

Olanzapine: 50%

0.84 (3.9)

13.5

41 (11)

74.3 (19)

65

32

27

11.11

Risperidone: 50%

0.42 (1.23)

20.5

41 (11)

76.8 (16.8)

66

30

27

5.26

9b

Recurrence prevention

408

Paliperidone: 50.2%

1.78 (6.67)

10.7

39 (11)

70 (18.3)

65

18

47

5.85

Placebo: 49.8%

0

10.8

39 (11)

70.6 (17.6)

66

18

45

2.46

10b

53 weeks

748

Paliperidone: 50.7%

4.33 (8.50)

9

41 (12)

82 (12.7)

92

0

43

13.19

Risperidone: 49.3%

0.38 (4.78)

8.4

41 (12)

81.2 (13.4)

92

0

38

14.09

11b

13 weeks

387

Paliperidone: 75.5%

1.33 (4.00)

15.8

40 (11)

90.4 (11.3)

40

41

32

12.33

Placebo: 24.5%

0

20

40 (11)

93.9 (12.9)

38

41

27

9.47

12b

13 weeks

515

Paliperidone: 75.5%

1.33 (2.67)

11.3

40 (11)

90.8 (12)

67

29

32

12.34

Placebo: 24.5%

0

7.9

40 (11)

90.7 (12.3)

66

29

38

7.14

13b

13 weeks

651

Paliperidone: 74.8%

2 (4.00)

7.6

39 (11)

87.3 (11.5)

53

31

32

11.29

Placebo: 25.2%

0

6.7

39 (11)

86.8 (10.2)

54

32

34

4.27

14b

9 weeks

247

Paliperidone: 66%

1 (2.00)

8

38 (10)

94.4 (11.5)

70

17

31

5.52

Placebo: 34%

0

7.1

39 (11)

95.7 (12.7)

73

17

35

3.57

All studies

5923

Olanzapine: 9%

0.84 (3.9)

8.8

39 (11)

87.5 (17.1)

62

16

31

17.07

   

Paliperidone: 58.8%

2 (21.3)

11.1

39 (12)

89.3 (13.8)

62

18

38

10.40

   

Placebo: 23.1%

0

12.1

40 (12)

89 (15.1)

60

18

38

4.82

   

Risperidone: 9.1%

0.40 (4.78)

12.2

41 (12)

79.8 (14.7)

84

9

34

11.30

  1. Exposure is in 10 g chlorpromazine equivalent units (i.e., 100,100 mg chlorpromazine equivalents)
  2. WG weight gain, PANSS positive and negative syndrome scale
  3. aTrial measuring adherence through pill counts
  4. bTrial measuring adherence with injectable treatment drugs