Copeptin for Risk Stratification in Non-traumatic Headache in the Emergency Setting - The CoHead Study (CoHead)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01174901
Recruitment Status : Completed
First Posted : August 4, 2010
Last Update Posted : May 26, 2014
Information provided by (Responsible Party):
University Hospital, Basel, Switzerland

Brief Summary:

Headache is a common symptom, and patients often seek medical attention at emergency departments due to headaches.

The aim of the CoHead Study is to find out if it is possible by measuring copeptin, a marker of stress in the blood, to find out which patients have simple headaches and which patients have dangerous headaches that are the symptom of an underlying disease and need further investigation and treatment.

Copeptin is a marker for physical stress and has been tested in patients with stroke, heart attack and pneumonia. In all these illnesses, the patients with the most serious forms had the highest levels of copeptin, while the ones with only mild presentation or no affection at all had the lowest levels of copeptin.

The investigators expect to show the same in patients with headaches.

Condition or disease
Head Pain

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Detailed Description:

Background: In the emergency setting, non-traumatic headache (NTH) is in 80% a benign symptom, but serious causes have to be ruled out.

Copeptin, as a surrogate marker for antidiuretic hormone (ADH), is a marker for the individual stress level, even more subtle than cortisol. As a prognostic stress hormone it holds promise as a prognostic point of care tool in the risk stratification of different acute illnesses such as acute myocardial infarction, respiratory tract infections and cerebrovascular events, among others.

Objective: To evaluate copeptin as a marker for risk stratification in NTH. Design: Prospective multicenter observational cohort study with a derivation set and a validation set.

Location Setting: Emergency Department (ED) and Medical Policlinic (MUP; walk-in clinic) and Neurologic Clinic (NC) of the University Hospital of Basel. ED and NC of the Cantonal Hospital of Aarau.

Intervention: Patients presenting to the ED or the MUP or the NC with NTH are recruited during a 1-year-period. After informed consent is given by the patient, baseline data will be assessed including medical history, clinical items (i.e. neurological status, vital parameters, blood pressure, BMI) and routine laboratory items. Patients will be evaluated using a validated standardized diagnostic tool and questionnaire. CT scans and other diagnostics, such as lumbar puncture, MRI, etc., will be ordered upon request of the treating physician. All diagnostic procedures, results, diagnosis made by the treating physicians and initiated therapy will be recorded. Copeptin will be measured on admission by batch analysis by blinded laboratory staff upon completion of the study.

After 3 months, all patients will be followed-up by a structured telephone interview to assess the final diagnosis and outcome (i.e. MIDAS-Questionnaire). The final diagnosis will be made by two independent physicians according to ICHDII-criteria and verified by a board-certified neurologist, all blinded to copeptin levels. Thereby, primary and secondary headache entities will be classified according to ICHD.

Endpoints: The primary endpoint of this study is serious secondary NTH as opposed to benign, self-limiting NTH. Serious secondary NTH will be defined as a composite endpoint including different secondary NTH causes and entities as listed in the International Classification of Headache Disorders (ICHD)-II-Criteria.

The secondary endpoint will be clinical outcome of patients; thereby we will look at all-cause mortality within the 3-month follow-up period and at morbidity measured by the MIDAS-questionnaire.

Study hypothesis: We hypothesize that copeptin will serve as a point of care tool to discriminate benign headache from potentially serious secondary headaches (e.g. subarachnoidal hemorrhage (SAH) or cerebral aneurysm, intracranial bleeding (ICB), brain tumor, vasculitis, meningitis) which require prompt hospitalisation and intervention. Based on copeptin values measured in other acute diseases, we assume a critical range between 5 and 20 pmol/l. The lower copeptin cutoff point of ≤ 5 pmol/l will have a sensitivity of ≥ 97% for ruling out serious secondary headache, and the higher cutoff point of ≥ 20 pmol/l will have a specificity of 90% to confirm serious NTH.

Analysis: Based on data of two previous years, we aim to recruit 600 - 800 patients within one year at the sites of Basel and Aarau, respectively, of which 10-20% will present with serious secondary NTH. We will calculate 95% confidence intervals of sensitivity of copeptin of <10% and perform multivariable logistic regression analysis to assess the independent and additive utility of copeptin compared with other risk scores and outcome predictors. The first 50% of patients will be used as derivation set and the second 50% as the validation set, based on the timely inclusion of patients.

Significance: If copeptin as a biomarker safely rules out serious secondary causes of NTH, it will represent a tool for an optimized allocation of health care resources.

Study Type : Observational
Actual Enrollment : 400 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: Copeptin for Risk Stratification in Non-traumatic Headache in the Emergency Setting - The CoHead Study
Study Start Date : October 2010
Actual Primary Completion Date : August 2013
Actual Study Completion Date : August 2013

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Differentiation between serious secondary non-traumatic headache as opposed to benign, self-limiting non-traumatic headache by copeptin level measurement [ Time Frame: At study entry, assessment of baseline characteristics, questionnaire, further investigations done by attending physician, and blood collection for copeptin measurement. telephone interview after 3 months. ]

    Assessment of the prognostic value of copeptin to predict the primary endpoint (serious secondary NTH).

    Non-traumatic headache (NTH) will be assessed and defined according to the ICHD-II-Criteria. Serious secondary NTH will be defined as a composite endpoint including different secondary NTH causes and entities as listed in the ICHD-II-Criteria.

Secondary Outcome Measures :
  1. clinical outcome of patients [ Time Frame: study entry and 3-month-interview ]
    • all-cause mortality within the 3-month follow-up period
    • morbidity measured by the MIDAS-questionnaire which is performed at study entry and at the 3-month-interview

  2. Additive benefit on sensitivity if copeptin and a diagnostic algorithm are combined [ Time Frame: study entry and 3-month-interview ]
    A validated, diagnostic algorithm consisting of four clinical scenarios (published by Grimaldi et al.) will be used by the study team upon entry into the study. We will evaluate the additive benefit of copeptin to this algorithm with means of multivariate logistic regression analysis and calculation of reclassification tables.

  3. Comparison of copeptin with other potential biomarkers in non-traumatic headache [ Time Frame: study entry and 3-month-interview ]
    We will compare the diagnostic and prognostic accuracy of copeptin with other potential biomarkers which have been reported to be of diagnostic value in migraine or cerebrovascular events, both being potential clinical scenarios of non-traumatic headache.

Biospecimen Retention:   Samples Without DNA
7.5 ml of EDTA blood, 7.5 ml of serum, 4.3 ml of citrate blood

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
Patients presenting to emergency department or walk-in clinic

Inclusion Criteria:

  • headache at the time of screening
  • Patients must be able to give informed consent

Exclusion Criteria:

  • less than 18 years of age
  • preceding (head) trauma

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01174901

Kantonsspital Aarau AG
Aarau, AG, Switzerland, 5001
University Hospital of Basel
Basel, BS, Switzerland, 4031
Sponsors and Collaborators
University Hospital, Basel, Switzerland
Principal Investigator: Mirjam Christ-Crain, MD, PhD Department of Endocrinology, University Hospital of Basel, Switzerland

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: University Hospital, Basel, Switzerland Identifier: NCT01174901     History of Changes
Other Study ID Numbers: CoHead
First Posted: August 4, 2010    Key Record Dates
Last Update Posted: May 26, 2014
Last Verified: May 2014

Keywords provided by University Hospital, Basel, Switzerland:
C-terminal provasopression
physiological stress response

Additional relevant MeSH terms:
Diabetes Insipidus
Disease Attributes
Pathologic Processes
Neurologic Manifestations
Nervous System Diseases
Signs and Symptoms
Kidney Diseases
Urologic Diseases
Pituitary Diseases
Endocrine System Diseases
Arginine Vasopressin
Vasoconstrictor Agents
Antidiuretic Agents
Natriuretic Agents
Physiological Effects of Drugs