Validation and Further Analysis of the <scp>COPD</scp> Exacerbation Recognition Tool ( <scp>CERT</scp> )
Bibliographic record
Abstract
BACKGROUND AND OBJECTIVE: The COPD Exacerbation Recognition Tool (CERT) contains five symptoms that may change at the onset of an exacerbation. It was designed to help patients with COPD recognise the onset of an exacerbation and seek medical attention. This study tested its sensitivity and specificity and further examined its properties. METHODS: Stable and exacerbating patients presenting to three tertiary hospitals in China were enrolled. Patients' responses to the CERT were compared with physicians' diagnoses made using GOLD 2021 criteria. The CERT was assessed as recommended, and as a total score, using scores assigned to the degree of change for each of the five symptoms (total score 15). Exploratory factor analysis (EFA) was used to identify the key components of the CERT and potentially reduce the number of items. RESULTS: Sensitivity and specificity of the original CERT were 92.4% and 72.1%. Using a cut-off value of 6, the score-based CERT had the better sensitivity (94.3%) and specificity (86.9%). Concordance between CERT and physician diagnosis was higher with the scored version (kappa 0.833) versus the original version (kappa 0.666). Using EFA, two components were identified 'cough and sputum' and 'breathlessness and activity limitation' with a cumulative variance of 82.3%. CONCLUSION: The original and scored-based CERT both had good sensitivity and specificity, but the score-based version showed better concordance with physician diagnosis. The use of two representative items in a 2-item scored version was also effective in identifying acute exacerbations. TRIAL REGISTRATION: ChiCTR2400090589 registered with https://www.chictr.org.cn.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".