Table 1

Psychometric properties of the 3 items disability scale

Convergent validity measure




HSC score (N = 46)
Trauma score (N = 63)


r
r
Disability Scale score
0.60
-0.07

p < 0.001
p = 0.60

Known group validity measure (N = 69)




Mean Disability score (SD)
Frequency

CMD
7.80 (4.76)
5
Epilepsy
6.34 (3.40)
29
Psychosis
10.83 (2.16)
35
ANOVA p < 0.001



Internal consistency (N = 81)




Cronbach's alpha


Disability Scale
0.95


Souza et al. International Journal of Mental Health Systems 2009 3:17   doi:10.1186/1752-4458-3-17