Table 3 Intra-class correlation coefficients with 95% confidence intervals between the subject and NOK for BISS, BPRS, MADRS, Ham-D, YMRS, CTQ, BISS illness subscale and Barratt Impulsivity Scale

From: Concordance of psychiatric symptom ratings between a subject and informant, relevancy to post-mortem research

Instrument

Subject

NOK

Intra-class correlation coefficient (95% confidence interval)

Ham-D

N

20

20

 

 Mean (s.d.)

17.2 (12.5)

12.1 (11.6)

0.44 (0.03, 0.72)

 Min, max

0, 50

0, 47

 

MADRS

N

20

20

 

 Mean (s.d.)

11.4 (9.4)

9 (10.2)

0.44 (0.03, 0.72)

 Min, max

0, 33

0, 45

 

YMRS

N

20

20

 

 Mean (s.d.)

7.5 (7.3)

6 (8.9)

0.61 (0.26, 0.82)

 Min, max

0, 26

0, 40

 

BPRS

N

19

19

 

 Mean (s.d.)

24.5 (8.7)

24.8 (8.6)

0.58 (0.19, 0.81)

 Min, max

9, 48

18, 56

 

CTQ

N

14

11

 

 Mean (s.d.)

56.6 (18.2)

48.7 (13.8)

0.48 (−0.15, 0.83)

 Min, max

30, 102

21, 76

 

BISS total score

N

20

20

 

 Mean (s.d.)

33.8 (21.4)

24.4 (23.9)

0.59 (0.23, 0.81)

 Min, max

6, 87

2, 112

 

BISS score factors

 Mania

   

N

20

20

 

Mean (s.d.)

8.7 (7.9)

7 (8.7)

0.66 (0.34,0.85)

Min, max

0, 31

0, 39

 

 Depression

   

N

20

20

 

Mean (s.d.)

9.5 (7)

7 (7.2)

0.28 (−0.16, 0.62)

Min, max

0, 26

0, 22

 

 Irritability

   

N

20

20

 

Mean (s.d.)

4.5 (3.9)

3.5 (3.7)

0.57 (0.2, 0.8)

Min, max

0, 14

0, 15

 

 Anxiety

   

N

20

20

 

Mean (s.d.)

3 (3.1)

2.1 (3.6)

0.46 (0.05, 0.74)

Min, max

0, 10

0, 15

 

Barratt Impulsiveness Scale

N

18

19

 

 Mean (s.d.)

73.9 (15.7)

76.2 (15.8)

0.36 (−0.11, 0.70)

 Min, max

47, 96

43, 112

 
  1. Abbreviations: BISS, Bipolar Disorder Inventory of Symptoms Scale; BPRS, Brief Psychiatric Rating Scale; CTQ, Childhood Trauma Questionnaire; Ham-D, Hamilton Depression Rating Scale; MADRS- Montgomery Asberg Depression Rating Scale, NOK, next-of-kin (informant); YMRS, Young Mania Rating Scale.