Feasibility of Absent in Melanoma 2 as a Serological Marker in Relation to Complicated Community-Acquired Pneumonia in Children: A Prospective Cohort Study
Bibliographic record
Abstract
Linjie Hu,1 Peng Zhou,1 Shanlin Wang,2 Yaping Shen,1 Suli Xing,1 Yuehan Zhang,1 Yanyan Zhu2 1Department of Pediatric, Shengzhou People’s Hospital (Shengzhou Branch of The First Affiliated Hospital of Zhejiang University School of Medicine, The Shengzhou Hospital of Shaoxing University), Shengzhou, Zhejiang, 312400, People’s Republic of China; 2Department of Pediatric, Hangzhou Children’s Hospital, Hangzhou, Zhejiang, 310014, People’s Republic of ChinaCorrespondence: Yanyan Zhu, Department of Pediatric, Hangzhou Children’s Hospital, 195 Wenhui Road, Hangzhou, Zhejiang, 310014, People’s Republic of China, Email zhyy0505@163.comObjective: Absent in melanoma 2 (AIM2) is associated with inflammation. We intended to determine whether serum AIM2 levels are related to severity and complications of community-acquired pneumonia (CAP) in children.Methods: In this prospective cohort study, serum AIM2 levels were measured in 305 children with CAP and in 100 healthy controls at the Hangzhou Children’s Hospital between January 2022 and June 2023. CAP severity was assessed using the pediatric critical illness score (PCIS) and clinical pulmonary infection score (CPIS). In-hospital complicated CAP was identified as the outcome variable. Univariate and multivariate analyses were sequentially performed to determine the correlation between severity, outcome and serum AIM2 levels.Results: Children with CAP had higher serum AIM2 levels than controls (median, 1.45 ng/mL versus 0.36 ng/mL; P< 0.001). Serum AIM2 levels in diseased children were independently correlated with PCIS (beta=− 0.020; P=0.001) and CPIS (beta=0.092; P=0.002), were linearly related to likelihood of complicated CAP (P for nonlinear =0.057), and were independently associated with complicated CAP (odds ratio= 6.162; P=0.005). The outcome association was robust by calculating the E-value at 11.8 and was not moderated by age, sex, weight and more (all P interaction > 0.05). Serum AIM2 levels and two independent predictors, PCIS and CPIS, were integrated to construct the model. The model was pictorially represented by the nomogram and exhibited satisfactory discrimination capability, validity, and stability under the receiver operating characteristic (ROC) curve, decision curve, and calibration curve. By computing the net reclassification improvement and integrated discrimination improvement indices and comparing the area under the ROC curve, the model significantly outperformed the combination of the PCIS and CPIS.Conclusion: Markedly enhanced serum AIM2 levels following CAP in children are highly linked to severity and complicated CAP, substantializing serum AIM2 as a biochemical metric for assessing the severity and identifying adverse outcomes of childhood CAP.Keywords: community-acquired pneumonia, children, absent in melanoma 2, outcomes, severity, biomarkers
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".