In essence the researchers are hoping to test two separate hypotheses (described below in the form of research questions). Therefore, the proposed analysis has been outlined according to each hypothesis. Hypothesis 1: Is low-dose quetiapine (50 mg/day) more effective for patients with depression who have insomnia at treatment baseline? (Stated differently: is low-dose quetiapine 50 mg/day effective as monotherapy for patients with depression regardless of whether or not they have insomnia at baseline?). Hypothesis 2: Is high-dose quetiapine (150 - 300 mg/day) more effective for patients presenting with melancholic depression at treatment baseline?
Age range
18 Years – 65 Years
Sex
ALL
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Number of Participants With 50 Percent Or Greater Reduction in the MADRS Score Over Time for the Quetiapine XR 150-300mg and Placebo 2 Arms/Groups Stratified by Depression Type (Melancholic vs. Nonmelancholic)
Timeframe: 1 - 6 weeks
Modified MADRS Response Rates
Timeframe: 1 - 6 weeks
MADRS Response Rates
Timeframe: Day 4 - Week 6
Modified MADRS Response Rate
Timeframe: Day 4 - Week 6