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Table 1 Sample characteristics for eligible publications (listed by year of publication)

From: A systematic review of the frequency and severity of manic symptoms reported in studies that compare phenomenology across children, adolescents and adults with bipolar disorders

Publication

Country

Sample size (n)

Gender (% males)b

Age groups (age range in years and number of participants per group)a

Setting

BD subtypes

Child

Adolescent

Adult

Ballenger et al. (1982)

USA

21

NK

 

<21

(n = 9)

>30

(n = 12)

Inpatient

BD-I (mania)

McElroy et al. (1997)

USA

128

43%

 

12–18

(n = 40)

19–45

(n = 88)

Inpatient

BD-I (mania)

Findling et al. (2001)

USA

90

71%

5–11

(n = 56)

12–17

(n = 34)

 

Outpatient

BD-I

Jerrell and Shugart (2004)

USA

267

52%

7–17

(n = 83)

18–59

(n = 184)

Inpatient and outpatient

BD-I

Lazaro et al. (2007)

Spain

43

40%

< 13

(n = 14)

≥13

(n = 29)

 

Outpatient

BD-I, BD-II and BD-NOS

Birmaher et al. (2009)c

USA

263

53%

4–11

(n = 173)

<12

(n = 90)

 

Inpatient and outpatient

BD-I, BD-II and BD-NOS

Song et al. (2010)

Korea

53

59%

NK

(n = 16)

NK

(n = 37)

 

Inpatient

BD-I, BD-II and BD-NOS

Chan et al. (2011)

UK

35

51%

7–12

(n = 9)

13–18

(n = 26)

 

Outpatient

BD-I, BD-II and BD-NOS

Safer et al. (2012)

USA

1106

NK

10–17

(n = 457)

18–65

(n = 649)

Inpatient and outpatient

BD-I (mania)

  1. NK not known
  2. aAge Groups: child refers to prepubertal children or those aged ≤12; adolescent refers to age ≥13 to 18 years, although one study extended the age range up to 21 years; –adult refers to individuals aged ≥18 years, although one study chose a minimum of age ≥30 years
  3. bPercentages are reported to the nearest integer
  4. cThe study reported three age groups, but only two met eligibility criteria for inclusion in this review