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There is one clinical trial.
The study will be looking at whether a taste test device can be used as a diagnostic aid for depression. Taste tests will be carried out before and after first use of an antidepressant (prescribed by the patient's GP) and then again a month later a further taste test will be conducted. The results of these tests will be assessed to see if they correlate with the outcome of validated mood questionnaires carried out at the first and second visits.
Description: Change in taste threshold measures (sweet, salt, bitter, sour) between baseline and post-probe(s) at day 1 and 28 days after antidepressant treatment is initiated is assessed with the assistance of a taste test device.
Measure: Change in taste threshold with antidepressant treatment Time: 4-6 weeks (per patient)Description: Change in mood (assessed by score on the Beck Depression Inventory (BDI)) with antidepressant treatment is assessed. BDI scores may range from 0-63, where 0 demonstrates the lowest depression score and 63 the most severe depression.
Measure: Change in mood (assessed by score on the Beck Depression Inventory) with antidepressant treatment Time: 4-6 weeks (per patient)Description: Changes in scores on the Clinical Global Impression scale, as assessed by the participant's general medical practitioner is recorded. This scale ranges from 0-7, where 0 is the least severely ill and 7 the most severely ill.
Measure: Change in mood with antidepressant treatment, measured by the Clinical Global Impression Scale (CGI scale) Time: 4-6 weeks (per patient)Description: Change in mood with antidepressant treatment, measured by the Patient Health Questionnaire 9 (PHQ9). PHQ9 scores range from 0-27, where 0 is the score for the least depressed patients and 27 the most severely depressed patients.
Measure: Change in mood with antidepressant treatment, measured by the Patient Health Questionnaire 9 (PHQ9) Time: 4-6 weeks (per patient)Description: Change in mood with antidepressant treatment, measured by the Hospital Anxiety and Depression scale (HADS). HADS scores for depression range from 0-21, where 0-7 is normal, 8-10 borderline and 11+ indicates clinical depression
Measure: Change in mood with antidepressant treatment, measured by the Hospital Anxiety and Depression scale (HADS) Time: 4-6 weeks (per patient)Description: Change in mood with antidepressant treatment, measured by the Quick Inventory of Depressive symptomatology (QIDS). Scores for QIDS range from 0-27, where 0 indicates no symptoms of depression and 27 indicates the most severe depression.
Measure: Change in mood with antidepressant treatment, measured by the Quick Inventory of Depressive symptomatology (QIDS) Time: 4-6 weeks (per patient)Description: A computerised algorithm will be used to direct the taste test to assess taste sensitivity. The algorithm has been developed to direct the taste test, indicating which taste solutions should be presented to the participant in which order. Every solution presented is recorded, along with answers given. These will be examined after testing to validate the code's ability to follow the algorithm created and properly determine taste thresholds.
Measure: Validation of diagnostic algorithm, comparing the sequence of taste testing determined by software with the algorithm described in the software specification. Time: 12 months (duration of trial)Description: User views on ease of use of the device and testing process will be collected. Users will be asked to give ease of use a score from 1-5, where 1 is very easy and 5 is very difficult. Participants will also be asked whether they would use the taste test again.
Measure: User assessment of ease of use of the device and testing process. Time: 4-6 weeks (per patient)