Emoqol 100, an ultra ultra-brief mood case-finding tool: A diagnostic accuracy study.

Abstract

Case-finding for low mood in primary care can be time-consuming using current depression inventories. To assess the diagnostic accuracy, of a single verbally administered question on the emotional quality of life (Emoqol 100), for low mood in patients with symptoms of distress in an ambulatory care setting. Eligible patients were consecutive patients seen by one of the authors over 13 months with possible distress/low mood. The index test was the verbally asked Emoqol 100, which is the patient's emotional quality of life now, with 100 being perfect emotional health and 0 being the worst imaginable. The reference standard is the written version of the PHQ-9 with a cut point of ≥10. A retrospective audit of consecutive consultations in a single primary care clinic. One hundred two patients were seen during the study period, of which 76 met the eligibility criteria for this audit, and there were 215 test results. For a cut point of <50 on the Emoqol 100 and the PHQ-9 ≥10 the sensitivity was 47% (95% CI 39-54), and the specificity was 93% (95% CI 86-100). The positive predictive value was 95%, and the negative predictive value was 37%. This is the first accuracy estimation of the Emoqol 100. It appears to have a high specificity which means when it is positive (<50) it is a good estimate of a high PHQ-9, i.e. a mood issue probably exists. The test will be helpful for busy primary care clinicians as it takes less than 15 seconds to verbally administer.