This CRF is set up in modules to be used for recording data on the ISARIC COVID-19 Core Database or for independent studies. Module 1 and Module 2 complete on the first day of presentation/admission or on first day of COVID-19 assessment. Module 2 also complete on first day of admission to ICU or high dependency unit. In addition, complete daily for as many days as resources allow up to a maximum of 14 days. Continue to follow-up patients who transfer between wards. Module 3 (Outcome) complete at discharge or death General Guidance: - The CRF is designed to collect data obtained through examination, interview and review of hospital notes. Data may be collected retrospectively if the patient is enrolled after the admission date. - For more detailed guidance on how to complete these forms, please refer to the CRF Completion Guideline - Participant Identification Numbers consist of a 3 digit site code and a 4 digit participant number. You can obtain a site code and registering on the data management system by contacting ISARIC. Participant numbers should be assigned sequentially for each site beginning with 0001. In the case of a single site recruiting participants on different wards, or where it is otherwise difficult to assign sequential numbers, it is acceptable to assign numbers in blocks or incorporating alpha characters. E.g. Ward X will assign numbers from 0001 or A001 onwards and Ward Y will assign numbers from 5001 or B001 onwards. Enter the Participant Identification Number at the top of every page. - Printed paper CRFs may be used for later transfer of the data onto the electronic database. - For participants who return for re-admission to the same site, start a new form with a different Participant Identification Number. Please check “YES-admitted previously” in the ONSET & ADMISSION section. Enter as 2 separate entries in the electronic database. - For participants who transfer between two sites that are both collecting data on this form, it is preferred to have the data entered by a single site as a single admission, under the same Participant Identification Number. When this is not possible, the first site should record “Transfer to other facility” as an OUTCOME, and the second site should start a new form with a new patient number and indicate “YES-transferred” in ONSET & ADMISSION. - Complete every line of every section, except for where the instructions say to skip a section based on certain responses. - Mark ‘Not done’ for any results of laboratory values that are not available, not applicable or unknown. - Avoid recording data outside of the dedicated areas. Sections are available for recording additional information. - If using paper CRFs, we recommend writing clearly in ink, using BLOCK-CAPITAL LETTERS. - Place an (X) when you choose the corresponding answer. To make corrections, strike through (-------) the data you wish to delete and write the correct data above it. Please initial and date all corrections. - Please keep all of the sheets for a single participant together e.g. with a staple or participant-unique folder. - ISARIC would like the centers to enter data directly into their electronic data capture system. Please contact ISARIC about access. If your site would like to collect data independently, ISARIC can support you in the estabilishment of locally hosted databases. This version may serve as a basis for locally hosted databases. - Please contact ISARIC, if you need help with databases, have comments or to let ISARIC know that you are using the CRF. - Please let us know if you find any mistakes in the MDM Portal's version. FURTHER GUIDANCE AND DEFINITIONS (from the Completion guideline) Comorbidities: Comorbidities present before the onset of COVID-19 and are still present. Do not include those that developed following the onset of COVID-19 symptoms. More detailed guidance is provided. Hospital admission: For patients who were admitted to hospital with COVID-19 or symptoms consistent with possible COVID-19 infection, please enter details for the date of hospital admission. For patients with a clear alternative diagnosis leading to admission who subsequently acquired COVID-19, original admission date should be provided, but all subsequent references to admission should be taken as referring to day COVID-19 was first clinically suspected (or within the first 24 hours after first day of suspected or confirmed COVID-19 infection). Where a patient was admitted via multiple hospital departments, count admission from the time they came to the first department during the visit that led to their admission (e.g. arrival at the Emergency Department). Oxygen therapy: Include any form of supplemental oxygen received using any methods. Invasive ventilation: Please include any mechanical ventilation delivered following intubation or via a tracheostomy. Do not include patients who are breathing independently via a tracheostomy. Non-invasive ventilation: Please include any positive-pressure treatment given via a tight-fitted mask. This can be continuous positive pressure (CPAP) or bi-level positive pressure (BIPAP). Renal replacement therapy or dialysis: Please include any form of continuous renal replacement therapy or intermittent haemodialysis. Worst result: References to ‘worst result’ refer to those furthest from the normal physiological range or laboratory normal range. Results that were rejected by the clinical team (e.g. pulse oximetry on poorly perfused extremities, haemolysed blood samples, contaminated microbiology results) should not be reported. The following measures should be considered as a single observation and entered together: Blood gas results: Please report the measures from the blood gas with the lowest pH (most acidotic). Blood pressure: Please report the systolic and diastolic blood pressure from the observation with the lowest mean arterial pressure (if mean arterial pressure has not been calculated, report the measurement with lowest systolic blood pressure). Respiratory rate: If both abnormal low and high rate observed, record the abnormally high rate. General information about ISARIC ISARIC has developed a portfolio of resources to accelerate outbreak research and response. All resources are designed to address the most critical public health questions, have undergone extensive review by international clinical experts, and are free to use. ISARIC should be acknowledged and informed if you implement the protocol. Ethical apporval of the protocol and all necessary operational and financial arrangements are the responsibility of the investigators. This form refers to the CoV CASE RECORD FORM Version 1.3 25 Aug 2020. See

  1. 1/18/21 1/18/21 -
  2. 9/20/21 9/20/21 -
Copyright Holder:
ISARIC on behalf of Oxford University
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September 20, 2021

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ISARIC/WHO Novel Coronavirus (nCoV) / COVID-19 Case Record Form


Participant Identification
At ANY time during hospitalisation, did the patient receive/undergo:
Any Oxygen therapy?
Total duration: unknown
Maximum O2 flow volume:
Non-invasive ventilation? (Any)
Total duration: unknown
Invasive ventilation (Any)?
Total duration: unknown
Prone Positioning?
Total duration: unknown
Inhaled Nitric Oxide?
Tracheostomy inserted?
Extracorporeal support?
Total duration: unknown
Renal replacement therapy (RRT) or dialysis?
Total duration: unknown
ICU or High Dependency Unit admission?
Total duration: unknown
Date of ICU admission: unknown
At any time during hospitalisation did the patient experience
Viral pneumonitis
Bacterial pneumonia
Acute Respiratory Distress Syndrome
If you ticked "Yes" on Acute Respiratory Distress Syndrome, please specify the severity:
Pleural effusion
Cryptogenic organizing pneumonia (COP)
Cardiac arrest
Myocardial infarction
Cardiac ischaemia
Cardiac arrhythmia
Myocarditis / Pericarditis
Congestive heart failure
Stroke / Cerebrovascular accident
Meningitis / Encephalitis
Coagulation disorder / Disseminated Intravascular Coagulation
Pulmonary embolism
Rhabdomyolysis / Myositis
Acute renal injury/ Acute renal failure
Gastrointestinal haemorrhage
Liver dysfunction
Other Complications
Was patient clinically diagnosed with COVID-19?
Was pathogen testing done during this illness episode?
If positive, specify:
If positive, specify:
Bacteria: unknown
Other pathogen/s detected:
Pathogen: unknown
Clinical pneumonia diagnosed?
Chest X-Ray performed?
If Chest X-Ray was performed: Were infiltrates present?
CT performed?
If CT was performed: Were infiltrates present?
Biospecimen Testing
Biospecimen Type
Laboratory test method
Laboratory Test Result
Medication: While hospitalised or at discharge, were any of the following administered? Antiviral therapy
Antiviral or COVID-19 targeted agent?
If YES, specify all agents and duration:
Duration: unknown
Medication: While hospitalised or at discharge, were any of the following administered? Antibiotic therapy
Duration: unknown
While hospitalised or at discharge, were any of the following administered? Corticosteriods
If YES, Route: Oral
If YES, Route: Intravenous
f YES, Route: Inhaled
If YES, Route: unknown
Date of commencement: unknown
Duration: unknown
Medication: While hospitalised or at discharge, were any of the following administered? Heparin
If YES, Route: Subcutaneous
If YES, Route: Intravenous (IV)
If YES, Route: Unknown
If YES: Unfractionated
If YES: Low molecular weight heparin
If YES: Fondaparinux
If YES: Heparin type unknown
Date of commencement: unknown
Duration: unknown
Medication: While hospitalised or at discharge, were any of the following administered? Antifungal therapy
Antifungal agent?
Medication: While hospitalised or at discharge, were any of the following administered? Other treatments administered for COVID-19
Other treatments administered for COVID-19 including experimental or compassionate use?
Date of commencement: unknown
Duration of other treatment for COVID-19 known
Please select only one outcome
Outcome date: unknown
If Discharged alive: Ability to self-care at discharge versus before illness
If Discharged alive: Post-discharge treatment - Oxygen therapy?

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