Condition category
Mental and Behavioural Disorders
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status

Plain English Summary

Background and study aims
Depression is a recurrent illness associated with high death rate. Most of the patients do not respond to antidepressants (AD) (drugs used to treat depression/sadness). There is a clear need for methods that select the right treatment for the right patient. Previous studies identified a number of factors associated with successful treatment with antidepressants. Our goal is to compare those factors with standard antidepressants and find out how good these factors are in predicting the outcome of the treatment in patients suffering from depression.

Who can participate?
The study aims to recruit 40 patients with depression (aged between 18-65 years) who failed to respond to at least one antidepressant treatment.

What does the study involve?
Over a period of two years, participants will be invited to take part in the study. It will involve 6-week treatment with standard antidepressants (SSRI) that are usually used. The type of treatment will be decided by a specialist based on the condition of the patient. This will be discussed with the patient as usual. The patient will be invited to give blood sample before start of the new treatment and at week 1 and at the end of study. We will also record the brain activity using electroencephalogram (EEG).

What are the possible benefits and risks of participating?
There will be no immediate direct benefits to those taking part. There will not be considerable risks compared to regular treatment.

Where is the study run from?
The study will be carried out in Prague Psychiatric Center, Czech Republic.

When is the study starting and how long is it expected to run for?
The study starts in May 2013 and its clinical part will finish probably in June 2015. The participation of patients will last for 6 weeks.

Who is funding the study?
This study is funded by Internal Grant Agency of the Ministry of Health, Czech Republic.

Who is the main contact?
Dr Martin Bares

Trial website

Contact information



Primary contact

Dr Martin Bares


Contact details

Prague Psychiatric Center
Ustavni 91
Prague 8 - Bohnice
181 02
Czech Republic

Additional identifiers

EudraCT number number

Protocol/serial number

IGA MZ CR NT 14287

Study information

Scientific title

The predictors of response to antidepressant treatment in patients with resistant depression-an integrative approach - open-label, prospective study


Study hypothesis

The aim of our project is to compare efficacy of a decrease of QEEG prefrontal cordance, an increase of brain-derived neurotrophic factor in plasma (pBDNF) and serum brain-derived neurotrophic factor (sBDNF) all after 1st week of treatment, reduction of depressive symptomatology at week 1 and 2 and baseline values of LDAEP in the prediction of response to 6-week treatment with selective serotonin reuptake inhibitors (SSRI) in patients with resistant depression.

The next goal of project is to evaluate predictive ability of combination of above mentioned predictors and to postulate combined predictive model.

Ethics approval

The study was approved by Ethic Committee of Prague Psychiatric Center on the 20th June 2012 - reference number 69/12

Study design

Interventional non-randomized single-center open-label study

Primary study design


Secondary study design

Non randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details below to request a patient information sheet [only available in Czech language]


More than one previous unsuccessful antidepressant trial lasting 4 or more weeks in the current episode of depression


Subjects will be treated with selective serotonin reuptake inhibitors. Specific antidepressant will be chosen by attending psychiatrist according to clinical judgement and with regard to the history of previous treatment. Antidepressants will be used in the dose cited in Summary of Products. The total duration of treatment will be 6 weeks. Concomitant treatment (hypnotics and hydroxyzine) will be used in cases of prominent severe anxiety and insomnia. Depressive symptoms and overall clinical status will be assessed at baseline at week 1, 2, 4 and at the end of study using the MADRS Montgomery-Åsberg Depression Rating Scale, QIDS-SR (Quick Inventory of Depressive symptoms-SR) and CGI (Clinical Global Impression).
EEG (cordance calculations) will be recorded at baseline and after 1week of treatment. Measurement of BDNF: The blood samples will be collected at baseline, week 1 and at the end of study in patient´s non-fasting state, between 7.00 and 9.00 a.m.
Response to treatment is defined as a reduction of MADRS score higher or equal to 50% at the end of study.

Intervention type



Not Specified

Drug names

Serotonin reuptake inhibitors

Primary outcome measure

The ratio of occurrence of a priory defined predictors in responders and non-responders:
1. The reduction of MADRS score ≥20% at week 1 compared to baseline
2. The reduction of MADRS score ≥20% at week 2 compared to baseline
3. Reduction of prefrontal cordance value at week 1 compared to baseline,
4. The increase of pBDNF at week 1 compared to baseline
5. The increase of sBDNF at week 1 compared to baseline

Secondary outcome measures

The correlation of predictors value change at week 1 or 2 and the change of MADRS score at the end of study.

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Patients suffering from Major depressive disorder (recurrent or single episode) diagnosed according to Diagnostic and Statistical Manual of the American Psychiatric Association-IV. revision (DSM-IV) criteria, confirmed using The Mini-International Neuropsychiatric Interview - M.I.N.I., Czech version 5.0.0.
2. Patients fulfilling at least Stage I (≥1 previous, unsuccessful, adequate, antidepressant treatment) criteria for resistant depression according to Thase and Rush.
3. The mental ability to understand and sign Informed Consent Form.
4. The score in the Montgomery and Åsberg Rating Scale (MADRS) ≥25 and the score in Clinical Global Impression (CGI)≥4.
5. Inpatients.
6. Age between 18 and 65 years, either sex

Participant type


Age group




Target number of participants


Participant exclusion criteria

1. Contraindications of treatment with selective serotonin reuptake inhibitors (SSRIs) (citalopram, escitalopram, fluoxetine, fluvoxamine, sertraline, paroxetine) according to Summary of Product (SPC)
2. Psychiatric comorbidity on axis I and II according to DSM IV in the 6 months before enrollment to the study
3. Patients with severe somatic disorders (cardiovascular disease, neoplasms, endocrinology disorders etc.) that could be associated with depression due to somatic disease.
4. Patients treated with electroconvulsive therapy less than 3 month before enrollment or suffering from neurologic disorder (e.g., epilepsy, head trauma with loss of consciousness) and patients using any treatment which can strongly affect EEG.
5. Patients who were treated unsuccessfully with more than one SSRIs during index episode.

Recruitment start date


Recruitment end date



Countries of recruitment

Czech Republic

Trial participating centre

Prague Psychiatric Center
Prague 8 - Bohnice
181 02
Czech Republic

Sponsor information


Ministry of Health (Czech Republic) - Internal Grant Agency

Sponsor details

Palackého nám. 4
181 02
Czech Republic

Sponsor type




Funder type


Funder name

Internal Grant Agency of Ministry of Health of Czech Republic grant ref: IGA MZ CR NT 14287

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

Publication list

1. 2017 results in (added 22/01/2019)

Publication citations

Additional files

Editorial Notes

22/01/2019: Publication reference added