Differentiating between Transient and Enduring distress on the Edinburgh Depression Scale within screening contexts

Research has shown that women screened as being 'possibly depressed' on the Edinburgh Depression Scale consist of two distinct duration types: those with Transient distress, and those with Enduring distress. This paper reports on the exploration of antenatal data to ascertain if information from the initial EDS screening can help determine which women may have Transient, and which Enduring, distress after just a few weeks.

Data from three antenatal studies were explored, where the EDS had been given twice within a psychosocial screening setting. Repeat testing of the EDS, together with a diagnostic interview, was conducted 2-5 weeks later.

Women with Enduring distress (those scoring high on both occasions) were significantly more likely to meet criteria for a depressive disorder than those with Transient distress. They also scored significantly and clinically meaningfully higher on their initial EDS, though no cut-off score was optimal in discriminating between the two duration categories. Differentiation could also not be made from the endorsement of the self-harm question, but was best when women were asked to predict how they would be feeling, and why.

The data come from three studies just with English-speaking women with slightly different methodologies, producing information on a fairly small number of women with Transient (n=12-29) and Enduring (n=14-25) distress. In addition the EDS re-test interval of between 2 and 5 weeks was quite wide.

Clinical implications are that women who score high initially on the EDS are most likely to continue to score high (have Enduring distress) if they themselves think this will be the case, or if they only give wishful thinking as the reason as to why they think they will feel better. Research studies should also therefore analyse their data taking into account this duration category.