Trial reportBMC psychiatry2017
Study protocol for a randomised pragmatic trial comparing the clinical and cost effectiveness of lithium and quetiapine augmentation in treatment resistant depression (the LQD study).
Trial report in BMC psychiatry, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03004521 (A Randomised Pragmatic Trial Comparing the Clinical and Cost Effectiveness of Lithium and Quetiapine Augmentation in Treatment Resistant Depression), which is not on this map. Cited by 11 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
A Randomised Pragmatic Trial Comparing the Clinical and Cost Effectiveness of Lithium and Quetiapine Augmentation in Treatment Resistant Depression
Who cites it
11 citing papers in PubMed, 2 syntheses or guidelines pooled it, 20 citations in OpenAlex.
- Pharmacological Augmentation in Unipolar Depression: A Guide to the Guidelines.The international journal of neuropsychopharmacology · 2020Pooled it
- Pharmacological interventions for treatment-resistant depression in adults.The Cochrane database of systematic reviews · 2019Pooled it
- Clinical and cost-effectiveness of lithium versus quetiapine augmentation for treatment-resistant depression in adults: LQD a pragmatic randomised controlled trial.Health technology assessment (Winchester, England) · 2025Trial
- The anxiolytic effects of quetiapine and lithium and anxiety as a moderator of the antidepressant effect: a secondary analysis of the lithium versus quetiapine in depression (LQD)trial.Psychopharmacology · 2026Article
- Defining Clinical Trial Estimands: A Practical Guide for Study Teams with Examples Based on a Psychiatric Disorder.Therapeutic innovation & regulatory science · 2023Article
- Patient perspectives of lithium and quetiapine augmentation treatment in treatment-resistant depression: A qualitative assessment.Journal of psychopharmacology (Oxford, England) · 2022Article
- A retrospective examination of care pathways in individuals with treatment-resistant depression.BJPsych open · 2021Article
- The PRECIS-2 tool seems not to be useful to discriminate the degree of pragmatism of medicine masked trials from that of open-label trials.European journal of clinical pharmacology · 2021Article
- Online mood monitoring in treatment-resistant depression: qualitative study of patients' perspectives in the NHS.BJPsych bulletin · 2020Article
- What do we know about long-term treatment outcomes for severe depressive disorders?BJPsych open · 2020Article
- The True Colours Remote Symptom Monitoring System: A Decade of Evolution.Journal of medical Internet research · 2020Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
15 authors at 4 institutions in 1 country.
Funding
Abstract
backgroundApproximately 30-50% of patients with major depressive disorder can be classed as treatment resistant, widely defined as a failure to respond to two or more adequate trials of antidepressants in the current episode. Treatment resistant depression is associated with a poorer prognosis and higher mortality rates. One treatment option is to augment an existing antidepressant with a second agent. Lithium and the atypical antipsychotic quetiapine are two such add-on therapies and are currently recommended as first line options for treatment resistant depression. However, whilst neither treatment has been established as superior to the other in short-term studies, they have yet to be compared head-to-head in longer term studies, or with a superiority design in this patient group.
methodsThe Lithium versus Quetiapine in Depression (LQD) study is a parallel group, multi-centre, pragmatic, open-label, patient randomised clinical trial designed to address this gap in knowledge. The study will compare the clinical and cost effectiveness of the decision to prescribe lithium or quetiapine add-on therapy to antidepressant medication for patients with treatment resistant depression. Patients will be randomised 1:1 and followed up over 12 months, with the hypothesis being that quetiapine will be superior to lithium. The primary outcomes will be: (1) time to all-cause treatment discontinuation over one year, and (2) self-rated depression symptoms rated weekly for one year via the Quick Inventory of Depressive Symptomatology. Other outcomes will include between group differences in response and remission rates, quality of life, social functioning, cost-effectiveness and the frequency of serious adverse events and side effects. DISCUSSION: The trial aims to help shape the treatment pathway for patients with treatment resistant depression, by determining whether the decision to prescribe quetiapine is superior to lithium. Strengths of the study include its pragmatic superiority design, broad inclusion criteria (external validity) and longer follow up than previous studies.
trial registrationISRCTN registry: ISRCTN16387615 , registered 28 February 2016. ClinicalTrials.gov: NCT03004521 , registered 17 November 2016.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.