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Patel A, Zhang M, Liao G, Karkache W, Montroy J, Fergusson DA, Khadaroo RG, Tran DTT, McIsaac DI, Lalu MM. A Systematic Review and Meta-Analysis Examining the Impact of Age on Perioperative Inflammatory Biomarkers. Anesth Analg 2021; 134:751-764. [PMID: 34962902 DOI: 10.1213/ane.0000000000005832] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Dysregulation of immune responses to surgical stress in older patients and those with frailty may manifest as differences in inflammatory biomarkers. We conducted a systematic review and meta-analysis to examine differences in perioperative inflammatory biomarkers between older and younger patients, and between patients with and without frailty. METHODS MEDLINE, Embase, Cochrane, and CINAHL databases were searched (Inception to June 23, 2020). Observational or experimental studies reporting the perioperative level or activity of biomarkers in surgical patients stratified by age or frailty status were included. The primary outcome was inflammatory biomarkers (grouped by window of ascertainment: pre-op; post-op: <12 hours, 12-24 hours, 1-3 days, 3 days to 1 week, and >1 week). Quality assessment was conducted using the Newcastle-Ottawa Scale. Inverse-variance, random-effects meta-analysis was conducted. RESULTS Forty-five studies (4263 patients) were included in the review, of which 36 were pooled for meta-analysis (28 noncardiac and 8 cardiac studies). Two studies investigated frailty as the exposure, while the remaining investigated age. In noncardiac studies, older patients had higher preoperative levels of interleukin (IL)-6 and C-reactive protein (CRP), lower preoperative levels of lymphocytes, and higher postoperative levels of IL-6 (<12 hours) and CRP (12-24 hours) than younger patients. In cardiac studies, older patients had higher preoperative levels of IL-6 and CRP and higher postoperative levels of IL-6 (<12 hours and >1 week). CONCLUSIONS Our findings demonstrate a paucity of frailty-specific studies; however, the presence of age-associated differences in the perioperative inflammatory response is consistent with age-associated states of chronic systemic inflammation and immunosenescence. Additional studies assessing frailty-specific changes in the systemic biologic response to surgery may inform the development of targeted interventions.
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Affiliation(s)
- Abhilasha Patel
- From the Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - MengQi Zhang
- From the Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Gary Liao
- From the Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Wassim Karkache
- From the Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | | | - Dean A Fergusson
- From the Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.,Clinical Epidemiology Program.,Blueprint Translational Group, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Rachel G Khadaroo
- Department of Surgery and Critical Care Medicine, University of Alberta, Walter C Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - Diem T T Tran
- Clinical Epidemiology Program.,Department of Anesthesiology and Pain Medicine, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - Daniel I McIsaac
- Clinical Epidemiology Program.,Department of Anesthesiology and Pain Medicine, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - Manoj M Lalu
- Clinical Epidemiology Program.,Blueprint Translational Group, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.,Department of Anesthesiology and Pain Medicine, The Ottawa Hospital, Ottawa, Ontario, Canada.,Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
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