Daily Respiratory Research Analysis
Analyzed 206 papers and selected 3 impactful papers.
Summary
Analyzed 206 papers and selected 3 impactful articles.
Selected Articles
1. Non-drug perioperative interventions to reduce postoperative pulmonary complications after abdominal surgery: systematic review and meta-analysis.
This large systematic review and meta-analysis (255 RCTs; 55,260 participants) synthesized evidence on non-pharmacologic perioperative strategies to prevent PPCs after abdominal surgery. Overall PPC incidence was 11.7% across trials, and high-certainty evidence supported low inspired oxygen fraction (FiO2) strategies. The study establishes an evidence hierarchy to guide PPC prevention in practice.
Impact: Defines evidence-based, widely applicable perioperative strategies to reduce PPCs, a major source of morbidity and cost. High-quality synthesis in a top general medical journal is likely to inform guidelines.
Clinical Implications: Perioperative teams should incorporate evidence-backed non-pharmacologic strategies—particularly low FiO2 approaches—into abdominal surgery pathways to reduce PPCs. The results can refine ERAS and anesthesia protocols.
Key Findings
- Synthesized 255 randomized trials (55,260 participants) assessing 10 intervention types (39 subtypes) for PPC prevention after abdominal surgery.
- Observed overall PPC incidence of 11.7% (6,467/55,260) across trials.
- High-certainty evidence supported the use of low inspired oxygen fraction (FiO2) strategies; an evidence hierarchy for PPC prevention was established.
Methodological Strengths
- Comprehensive search with no language restriction; dual independent screening and RoB 2.0 risk-of-bias assessment.
- Meta-analysis augmented by trial sequential analysis and GRADE certainty ratings.
Limitations
- Abstract truncation limits detail on effect sizes for specific interventions beyond low FiO2.
- Heterogeneity across interventions and perioperative practices may limit direct comparability.
Future Directions: Quantify comparative effectiveness of top-ranked strategies in head-to-head RCTs and evaluate implementation pathways within ERAS bundles to optimize PPC reduction.
OBJECTIVE: To evaluate the effectiveness of perioperative non-drug interventions in reducing postoperative pulmonary complications (PPCs) in adults undergoing abdominal surgery. DESIGN: Systematic review and meta-analysis. DATA SOURCES: Ovid MEDLINE, Embase, and Web of Science from database inception to January 2025 and updated in January 2026, with no language restrictions. STUDY SELECTION: Randomised controlled trials assessing the effectiveness of perioperative non-drug interventions for the prevention of PPCs
2. Dynamic, quantitative ESAT6-CFP10 skin test for tuberculosis risk prediction: a large-scale, multi-center, prospective cohort study.
In >73,000 school contacts, serial EC skin testing using the maximum induration from two tests markedly improved TB risk prediction over a single test. Risk rose 7% per 1-mm increase; a ≥5 mm threshold achieved 65% sensitivity and 96% specificity, and preventive therapy completion was strongly protective.
Impact: Provides a scalable, low-cost, quantitative strategy to target TB preventive therapy when IGRA capacity is limited, with strong discrimination in a massive, real-world cohort.
Clinical Implications: Adopt a ‘test twice, take maximum’ EC strategy in school/outbreak settings to prioritize high-risk contacts for TB preventive treatment; use ≥5 mm as a pragmatic threshold and ensure high completion rates of preventive therapy.
Key Findings
- Serial EC strategy (max of two tests) outperformed single test (C-statistic 0.806 vs 0.722).
- Each 1-mm increase in maximum induration increased TB hazard by 7%.
- At ≥5 mm, sensitivity was 65.0% and specificity 96.1%.
- Recent converters had PPV 3.4% (NNT ≈ 30) and HR 45.12.
- Preventive therapy completion reduced risk substantially (aHR 0.17).
Methodological Strengths
- Very large, multicenter, prospective cohort with active surveillance and registry linkage.
- Direct comparison of single versus serial testing using robust ROC and PR analyses.
Limitations
- Conducted in school outbreak settings in one province; generalizability may vary.
- Sensitivity remains limited; EC may miss some future cases.
Future Directions: Validate thresholds and serial-testing intervals across diverse populations and integrate EC-based risk stratification with digital registries to optimize preventive treatment delivery.
BACKGROUND: Predicting which individuals with METHODS: We enrolled 73,761 contacts identified during school-based tuberculosis outbreaks in Jiangsu, China, from 2020 to 2024. Participants underwent baseline EC test, chest radiography, and symptom screening. EC-negative individuals were retested after 8-12 weeks. Incident tuberculosis was identified through active surveillance and registry linkage. We compared single vs. serial test strategies using Cox models, receiver operating characteristic (ROC) curves and precision-recall (PR) curves. FINDINGS: Among 73,761 close contacts, 108 had prevalent tuberculosis and 190 developed incident cases (overall incidence 151.2 per 100,000 person-years). EC response size predicted incident tuberculosis in a steep, dose-dependent manner. Each 1-mm increase in the maximum response diameter was associated with a 7% higher hazard. The serial test strategy, utilizing the maximum response from two measurements, substantially outperformed single test [C-statistic: 0.806 vs. 0.722]. At the ≥5 mm threshold, this combined strategy yielded a sensitivity of 65.0% and specificity of 96.1%. The subgroup of recent converters had a PPV of 3.4% (95% CI: 2.8-4.1), corresponding to an NNT of approximately 30, and a hazard ratio (HR) of 45.12 (95% CI: 32.50-62.63). Preventive treatment completion was strongly protective (aHR 0.17; 95% CI: 0.11-0.25). INTERPRETATION: The "test twice, take maximum" EC strategy provides superior risk stratification for tuberculosis prevention. This approach identifies high-risk contacts for targeted intervention. Despite limited sensitivity, these results suggest that quantitative EC skin testing can provide a practical alternative for programmatic risk stratification. In settings where IGRAs are constrained by cost or infrastructure, this approach may enable more efficient targeting of preventive treatment. FUNDING: National Natural Science Foundation of China (82504476, 82473693, 82574173); Jiangsu Province Preventive Medicine Research Project (Ym2023039); The Special Scientific Research Project for Talent Introduction of the First Affiliated Hospital of Wannan Medical College (KY2960YR2530); Jiangsu Province Postgraduate Research and Innovation Project (KYCX24_2061).
3. Host gene expression analysis in the detection of bacterial and viral etiology in children hospitalized with a suspected severe infection.
Using RNA-seq of peripheral blood from 268 children, the authors derived and validated a 2-gene (TSPO and SECISBP2) signature that differentiates bacterial (and viral-bacterial co-infections) from viral infections with AUCs of 0.93 (discovery) and 0.87 (discovery+validation). Pooled sensitivity and specificity were 77% and 87%, respectively, despite clinical heterogeneity.
Impact: Provides a parsimonious, clinically translatable host-response signature that could reduce diagnostic uncertainty and antibiotic overuse in pediatric serious infections.
Clinical Implications: A 2-transcript blood test may support early antibiotic stewardship decisions in children presenting with suspected severe infection, complementing microbiological testing.
Key Findings
- Developed a 2-transcript (TSPO, SECISBP2) signature distinguishing bacterial/bacterial-viral co-infections from viral infections.
- Achieved AUC 0.93 (discovery respiratory cohort) and 0.87 (combined discovery+validation including non-respiratory cases).
- Overall sensitivity 77% and specificity 87%; transcriptome clustering alone did not map cleanly to etiology, underscoring clinical heterogeneity.
Methodological Strengths
- Discovery and validation across heterogeneous clinical syndromes with RNA-seq and prespecified performance metrics.
- Parsimony (2-gene) enhances translational potential for rapid assays.
Limitations
- Hospital-based cohorts; external validation in broader outpatient and low-resource settings is needed.
- Performance in specific subgroups (e.g., immunocompromised or very young infants) requires dedicated study.
Future Directions: Develop point-of-care assays for TSPO/SECISBP2 and prospectively test impact on antibiotic prescribing, clinical outcomes, and cost-effectiveness.
BACKGROUND: Host gene expression profiling holds great potential in improving the differential diagnostics of bacterial and viral infections. We investigated its discriminative value in children with suspected serious infections. METHODS: Peripheral blood gene expression profiles were analyzed by RNA sequencing in 268 children aged between 4 weeks and 16 years: 211 hospitalized due to a suspected severe infection, 15 with a confirmed viral respiratory tract infection managed as outpatients, and 42 healthy control children. We classified children acc