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Table 1 Characteristics of study participants

From: Efficacy and safety of adjunctive therapy to lamotrigine, lithium, or valproate monotherapy in bipolar depression: a systematic review and meta-analysis of randomized controlled trials

Study (year)

Intervention/Control

Age

year ± SD

Female

n (%)

Type of BD I/II

n (%)

Phase

of BD

Onset age

year ± SD

Rapid cycler

n (%)

Taking mood stabilizer

n (%)

van der Loos (2009)

Intervention: 64

LTG

45.2 ± 12.1

37/64 (57.8)

I: 43 (67.2)

II: 21 (32.8)

MDE

ND

12/64 (18.8)

Li: 64 (100)

Control: 60

Placebo

47.6 ± 11.6

30/60 (50.0)

I: 41 (68.3)

II: 19 (31.7)

MDE

ND

4/64 (6.7)

Li: 60 (100)

Houston (2009)

Intervention: 101

Olanzapine

38.6 ± 11.2

61/101 (60.4)

I: 101 (100)

MD

ND

27/101 (26.7)

VPA: 101 (100)

Control: 101

Placebo

38.5 ± 11.1

58/101 (57.4)

I: 101 (100)

MD

ND

22/101 (21.8)

VPA: 101 (100)

Sachs (2011)

Intervention: 148

Ziprasidone

40.4 ± 11.4

89/147 (60.5)

I: 148 (100)

MDE

ND

ND

Li: 53 (36.3)

VPA: 52 (35.6)

LTG: 41 (28.1)

Control: 150

Placebo

40.4 ± 11.9

91/147 (61.9)

I: 150 (100)

MDE

ND

ND

Li: 54 (36.7)

VPA: 52 (35.4)

LTG: 41 (27.9)

Loebel (2014)

Intervention: 183

Lurasidone

41.0 ± 11.5

86/179 (48.0)

I: 183 (100)

MDE

28.1 ± 11.0

ND

Li: 90 (50.3)

VPA: 89 (49.7)

Control: 165

Placebo

42.6 ± 11.8

76/161 (47.2)

I: 165 (100)

MDE

29.5 ± 10.7

ND

Li: 73 (45.6)

VPA: 87 (54.4)

Suppes (2016)

Intervention: 180

Lurasidone

43.1 ± 11.9

91/176 (51.7)

I: 180 (100)

MDE

28.8 ± 12.1

32/176 (18.2)

Li: 56 (31.8)

VPA: 120 (68.2)

Control: 176

Placebo

44.1 ± 12.0

93/166 (56.0)

I: 176 (100)

MDE

29.8 ± 12.8

21/166 (12.7)

Li: 57 (34.3)

VPA: 109 (65.7)

  1. Continuous variable is indicated as mean ± SD. Nominal variable values are indicated as number (%)
  2. BD, bipolar disorder; Li, lithium; LTG, lamotrigine; MDE, major depressive episode; MD, mixed depression; n, number; ND, not described; VPA, valproate, including divalproex; SD, standard deviation