Clinical Report: Links Between Systemic Immune-Inflammation Index and SIRI in COPD

Overview

This comprehensive review and meta-analysis evaluate the associations of the Systemic Immune-Inflammation Index (SII) and Systemic Inflammatory Response Index (SIRI) with chronic obstructive pulmonary disease (COPD). The findings indicate that elevated SII is significantly associated with higher prevalence of COPD and all-cause mortality, while SIRI does not show a significant association with COPD risk.

Background

Chronic obstructive pulmonary disease (COPD) is a major global health concern, affecting approximately 330 million individuals and being the third leading cause of death worldwide. The disease is characterized by chronic inflammation, which can lead to systemic effects and increased mortality. Understanding biomarkers like SII and SIRI is crucial for assessing disease risk and prognosis in COPD patients.

Data Highlights

Key Findings

• Elevated SII is significantly associated with higher prevalence of COPD.
• Higher SII correlates with increased all-cause mortality in COPD patients.
• No significant association was found between SIRI and COPD risk.
• Subgroup analyses revealed variability in SII associations based on study design and population characteristics.

Clinical Implications

The findings suggest that SII may serve as a valuable biomarker for assessing the prognosis of COPD patients. Clinicians may consider monitoring SII levels to better understand the risk of exacerbations and mortality in this population.

Conclusion

The study highlights the association of SII with COPD prevalence and all-cause mortality, while SIRI does not demonstrate a significant association with disease risk.

Related Resources & Content

1. Frontiers in Medicine, 2026 -- Associations of the systemic immune-inflammation index and systemic inflammatory response index with chronic obstructive pulmonary disease: a systematic review and meta-analysis
2. Frontiers in Cardiovascular Medicine — The association between systemic immune-inflammation index and mortality of elderly chronic bronchitis patients complicated by acute myocardial infarction
3. Frontiers in Medicine — Systemic inflammatory response index is associated with increased all-cause and cardiovascular mortality in obstructive sleep apnea: evidence from NHANES and validation with an external hospital-based dataset
4. Frontiers in Medicine — Preoperative neutrophil-to-lymphocyte ratio and systemic immune-inflammation index as prognostic biomarkers for postoperative pneumonia and pulmonary complications after thoracic surgery: a systematic review and meta-analysis
5. Frontiers in Oncology — Association of systemic immune-inflammation index with all-cause mortality in lung cancer patients undergoing radiotherapy: a retrospective cohort study
6. GOLD 2025 Global Strategy for the Diagnosis and Management of COPD
7. Frontiers | Associations of the systemic immune-inflammation index and systemic inflammatory response index with chronic obstructive pulmonary disease: a systematic review and meta-analysis