A latent trait analysis of an inventory designed to detect symptoms of anxiety and depression using an elderly community sample.
A Mackinnon, H Christensen, AF Jorm, AS Henderson, R Scott, AE Korten
Psychological Medicine | Published : 1994
An 18-item inventory designed by Goldberg et al. (1987) to detect symptoms of anxiety and depression was administered to an elderly general population sample. Latent trait analysis was used to assess the dimensionality of the inventory and the location and discriminatory ability of the symptoms. The items showed different patterns of discrimination in this group compared to the sample of general practice attenders on which the inventory was developed. Overall, the items did define two correlated dimensions of anxiety and depression. In addition, a third dimension of sleep disturbance was detected. Both individual scales and the total symptom scores were sensitive and relatively specific dete..View full abstract