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Heat wave warning: study reveals how chronic illness patients suffer in high temperatures

NCT ID NCT06890208

Knowledge-focused Sponsor: Universitätsklinikum Hamburg-Eppendorf Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This completed study looked at how rising temperatures affect people with chronic conditions like heart disease, diabetes, and depression. Researchers in Germany and Italy surveyed 176 patients to see what symptoms they experienced during heat and what protective steps they took. The goal was to understand which patients are most at risk and how to better support them during hot weather.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this study could help identify which patients are most vulnerable to heat and guide public health advice to protect them.
What could go wrong
This is an observational study, not a treatment trial, so it cannot prove cause and effect. Results may not apply to other regions or populations.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

176 people

The number who actually took part.

Started

Jun 2025

Finished

Sep 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

The study is located in different sites in Germany and Italy. Patients from approximately 30 GP practices will be included (15 GP practices in Germany and 15 GP practices in Italy). In each practice, eligible patients receive a flyer including a QR-Code and a short link to register for the online study. After documenting informed consent within the application, patients fill out the baseline questionnaire and receive invitations for 12 subsequent assessments of symptoms by email. The investigators estimated that approximately 1,200 patients will be contacted. From experience with similar studies the investigators anticipated a response rate of 20% (=240 patients).

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * being 18 years or older * at least one of the following conditions: Coronary Heart Disease; Myocardial Infarction; Heart Failure; Cardiac Arrhythmias; Peripheral Artery Disease; Stroke; Transient Ischemic Attack; Diabetes Mellitus (Type 1 or 2); Chronic Obstructive Pulmonary Disease; Asthma; Renal Insufficiency; Depressive Disorder; Anxiety Disorders; Schizophrenia; Peripheral Nervous System Diseases. Exclusion Criteria: * no capacity to consent * severe visual impairment * insufficient German language skills * not able to use internet browser (eg, lack of hardware)

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Conditions

The condition(s) this trial relates to.

anxiety disorder Arrhythmias, Cardiac asthma cardiac rhythm disease chronic obstructive pulmonary disease COPD, severe early onset coronary artery disorder Coronary Disease depressive disorder heart failure kidney failure myocardial infarction peripheral arterial disease peripheral nervous system disorder schizophrenia stroke disorder transient ischemic attack type 1 diabetes mellitus type 1 diabetes mellitus 1 type 2 diabetes mellitus

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Anxiety disorders Arrhythmias, cardiac Asthma Coronary disease Depressive disorder Diabetes mellitus type 2 Diabetes mellitus, type 1 Heart failure Ischemic attack, transient Myocardial infarction Peripheral artery disease Peripheral nervous system diseases Pulmonary disease, chronic obstructive Renal insufficiency Schizophrenia Stroke

Contacts and locations

Locations

  • University Medical Center Hamburg-Eppendorf

    Hamburg, Germany

More trials for these conditions

Other studies related to the condition(s) this trial covers.