Id |
Subject |
Object |
Predicate |
Lexical cue |
T220 |
0-10 |
Sentence |
denotes |
Background |
T221 |
11-159 |
Sentence |
denotes |
The severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) and resulting COVID‐19 pandemic present important diagnostic evaluation challenges. |
T222 |
160-515 |
Sentence |
denotes |
These range from, on the one hand, understanding the value of signs and symptoms in predicting possible infection, assessing whether existing biochemical and imaging tests can identify infection and recognise patients needing critical care, and on the other hand, evaluating whether new diagnostic tests can allow accurate rapid and point‐of‐care testing. |
T223 |
516-695 |
Sentence |
denotes |
Also, the diagnostic aims are diverse, including identifying current infection, ruling out infection, identifying people in need of care escalation, or testing for past infection. |
T224 |
696-923 |
Sentence |
denotes |
This review is part of a cluster of reviews on the diagnosis of SARS‐CoV‐2 infection and COVID‐19 disease, and deals solely with the diagnostic accuracy of presenting clinical signs and symptoms for diagnosing COVID‐19 disease. |
T225 |
925-957 |
Sentence |
denotes |
Target condition being diagnosed |
T226 |
958-1028 |
Sentence |
denotes |
COVID‐19 is the disease caused by infection with the SARS‐CoV‐2 virus. |
T227 |
1029-1265 |
Sentence |
denotes |
SARS‐CoV‐2 infection is diagnosed with reverse transcription polymerase chain reaction (RT‐PCR), which is a test that detects the virus' genetic material, with imaging to identify lung abnormalities and with clinical signs and symptoms. |
T228 |
1266-1614 |
Sentence |
denotes |
SARS‐CoV‐2 infection can be asymptomatic (no symptoms); mild or moderate; severe (causing breathlessness and increased respiratory rate indicative of pneumonia and oxygen need); or critical (requiring intensive support due to severe acute respiratory syndrome (SARS) or acute respiratory distress syndrome (ARDS), shock or other organ dysfunction). |
T229 |
1615-1819 |
Sentence |
denotes |
People with COVID‐19 pneumonia (severe or critical disease), require different patient management, which makes it important to distinguish between mild or moderate COVID‐19 disease and COVID‐19 pneumonia. |
T230 |
1820-2005 |
Sentence |
denotes |
In this review, we will examine the diagnostic value of signs and symptoms for symptomatic SARS‐CoV‐2 infection, which includes mild or moderate COVID‐19 disease and COVID‐19 pneumonia. |
T231 |
2006-2126 |
Sentence |
denotes |
In planning review updates, we will consider the potential addition of another grouping, which is a subset of the above: |
T232 |
2127-2231 |
Sentence |
denotes |
whether tests exist that identify people requiring respiratory support (SARS or ARDS) or intensive care. |
T233 |
2233-2246 |
Sentence |
denotes |
Index test(s) |
T234 |
2248-2266 |
Sentence |
denotes |
Signs and symptoms |
T235 |
2267-2398 |
Sentence |
denotes |
Signs and symptoms are used in the initial diagnosis of suspected COVID‐19 disease, and to identify people with COVID‐19 pneumonia. |
T236 |
2399-2473 |
Sentence |
denotes |
Symptoms are what is experienced by patients, for example cough or nausea. |
T237 |
2474-2599 |
Sentence |
denotes |
Signs are what can be evaluated by clinical assessment, for example lung auscultation findings, blood pressure or heart rate. |
T238 |
2600-2963 |
Sentence |
denotes |
Key symptoms that have been associated with mild to moderate COVID‐19 disease include: troublesome dry cough (for example, coughing more than usual over a one‐hour period, or three or more coughing episodes in 24 hours), fever greater than 37.8 °C, diarrhoea, headache, breathlessness on light exertion, muscle pain, fatigue, and loss of sense of smell and taste. |
T239 |
2964-3124 |
Sentence |
denotes |
Red flags indicating possible pneumonia include breathlessness at rest, loss of appetite, confusion, pain or pressure in the chest, and temperature above 38 °C. |
T240 |
3126-3142 |
Sentence |
denotes |
Clinical pathway |
T241 |
3143-3324 |
Sentence |
denotes |
Important in the context of COVID‐19 is that the pathway is multifaceted because it is designed to care for the diseased individual and to protect the community from further spread. |
T242 |
3325-3481 |
Sentence |
denotes |
Decisions about patient and isolation pathways for COVID‐19 vary according to health services and settings, available resources, and stages of the epidemic. |
T243 |
3482-3571 |
Sentence |
denotes |
They will change over time, if and when effective treatments and vaccines are identified. |
T244 |
3572-3761 |
Sentence |
denotes |
The decision points between these pathways vary, but all include points at which knowledge of the accuracy of diagnostic information is needed to be able to inform rational decision making. |
T245 |
3763-3776 |
Sentence |
denotes |
Prior test(s) |
T246 |
3777-3934 |
Sentence |
denotes |
In this review on signs and symptoms, no prior tests are required because signs and symptoms are used in the initial diagnosis of suspected COVID‐19 disease. |
T247 |
3935-4035 |
Sentence |
denotes |
Patients can, however, self‐assess before presenting to healthcare services based on their symptoms. |
T248 |
4036-4220 |
Sentence |
denotes |
This is in contrast to contact tracing, in which patients or participants are tested based on a documented contact with a SARS‐CoV‐2‐positive person and may themselves be asymptomatic. |
T249 |
4222-4243 |
Sentence |
denotes |
Role of index test(s) |
T250 |
4244-4443 |
Sentence |
denotes |
Signs and symptoms are used as triage tests, that is, to rule out COVID‐19 disease, but also to identify patients with possible COVID‐19 who may require further testing, care escalation or isolation. |
T251 |
4445-4464 |
Sentence |
denotes |
Alternative test(s) |
T252 |
4465-4591 |
Sentence |
denotes |
Chest X‐ray, ultrasound, and computed tomography (CT) are widely used diagnostic imaging tests to diagnose COVID‐19 pneumonia. |
T253 |
4592-4639 |
Sentence |
denotes |
Availability and usage varies between settings. |
T254 |
4640-4697 |
Sentence |
denotes |
We address these radiological tests in a separate review. |
T255 |
4699-4708 |
Sentence |
denotes |
Rationale |
T256 |
4709-4921 |
Sentence |
denotes |
It is essential to understand the accuracy of diagnostic tests including signs and symptoms to identify the best way they can be used in different settings to develop effective diagnostic and management pathways. |
T257 |
4922-5211 |
Sentence |
denotes |
We are producing a suite of Cochrane 'living systematic reviews', which will summarise evidence on the clinical accuracy of different tests and diagnostic features, grouped according to present research questions and settings, in the diagnosis of SARS‐CoV‐2 infection and COVID‐19 disease. |
T258 |
5212-5345 |
Sentence |
denotes |
Summary estimates of accuracy from these reviews will help inform diagnostic, screening, isolation, and patient management decisions. |
T259 |
5346-5455 |
Sentence |
denotes |
New tests are being developed and evidence is emerging at an unprecedented rate during the COVID‐19 pandemic. |
T260 |
5456-5593 |
Sentence |
denotes |
We will aim to update these reviews as often as is feasible to ensure that they provide the most up‐to‐date evidence about test accuracy. |
T261 |
5594-5816 |
Sentence |
denotes |
These reviews are being produced rapidly to assist in providing a central resource of evidence to assist in the COVID‐19 pandemic, summarising available evidence on the accuracy of the tests and presenting characteristics. |