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Table 1 Demographic and clinical variables of MPP, DPP, and IPP, and HC subjects

From: Cognitive impairments and predominant polarity in bipolar disorder: a cross-sectional study

Characteristics

MPP

(n = 17)

DPP

(n = 22)

IPP

(n = 16)

HC

(n = 31)

p value

Age (years)*

37.94 (10.30)

36.68 (10.11)

39.63 (13.80)

35.35 (6.96)

0.550

Gender (% male)*

47.0

45.4

31.2

32.2

0.606

Age of onset (years)*

23.83 (9.66)

25.00 (5.83)

21.66 (10.78)

0.690

Years of schooling*

12.47 (2.57)

12.82 (1.87)

12.63 (1.96)

11.74 (1.98)

0.260

Estimated IQ*

93.35 (8.80)

101.95 (10.25)

99.00 (12.36)

97.23 (9.50)

0.073

Time since onset of illness*

10.50 (8.73)

10.27 (5.96)

11.00 (8.02)

0.977

Number of manic episodes*

5.06 (5.14)

2.56 (2.45)

4.00 (2.93)

<0.001

Number of depressive episodes*

2.07 (1.43)

8.21 (6.62)

4.75 (4.06)

<0.001

Number of episodes*

7.82 (6.23)

16.59 (10.09)

6.75 (3.99)

<0.001

Psychotic symptoms**

11 (64.7)

8 (44.4)

3 (37.5)

0 (0)

0.338

Substance dependence**

4 (23.5)

7 (31.8)

2 (12.5)

0 (0)

0.384

Anxiety disorders**

9 (52.9)

11 (50)

6 (37.5)

0 (0)

0.986

Social phobia**

1 (5.8)

3 (13.6)

3 (18.7)

0 (0)

0.534

Specific phobia**

2 (11.7)

0 (0)

0 (0)

0 (0)

0.098

Obsessive–compulsive disorder**

2 (11.7)

3 (13.6)

2 (12.5)

0 (0)

0.984

Post-traumatic stress disorder**

1 (5.8)

0 (0)

0 (0)

0 (0)

0.438

  1. MPP mania predominant polarity; DPP depressive predominant polarity; IPP indefinite predominant polarity; Control healthy subjects
  2. The significance for the italic values are for p < 0.05
  3. * Results expressed as mean (SD)—one-way ANOVA
  4. ** Results expressed as frequency (%)—Chi-squared test