Evaluation of systemic immune-inflammatory index in patients with wet age-related macular degeneration

• Published in: Clinical and experimental optometry Vol. ahead-of-print; no. ahead-of-print; pp. 1 - 4
• Main Author: Gunay, Betul Onal
• Format: Journal Article
• Language: English
• Published: United States Taylor & Francis 2024; Taylor & Francis Ltd
• Subjects: Acuity; Age; Age-related macular degeneration; Angiogenesis Inhibitors - therapeutic use; Blood platelets; Blood tests; Electronic medical records; Female; Fluorescein Angiography; Humans; Inflammatory diseases; Intravitreal Injections; Leukocytes (neutrophilic); Lymphocytes; Macular degeneration; Male; Neutrophils; NLR; OCT; Patients; Platelets; PLR; Retrospective Studies; Sex; Statistical analysis; systemic immune-inflammatory index; Tomography, Optical Coherence - methods; Visual acuity; Wet Macular Degeneration; OCT; systemic immune-inflammatory index; Age-related macular degeneration; NLR; PLR
• ISSN: 0816-4622; 1444-0938
• DOI: 10.1080/08164622.2023.2201370

The systemic immune-inflammatory index is a relatively new parameter and has been shown to increase in inflammatory diseases.
The primary aim of this study was to investigate the systemic immune-inflammatory index in patients with wet-type age-related macular degeneration. The secondary aim was to determine the relationship between best-corrected visual acuity, central macular thickness, subfoveal choroidal thickness, systemic immune-inflammatory index, platelet-to-lymphocyte ratio, and neutrophil-to-lymphocyte ratio.
This study retrospectively analysed patients with wet-type age-related macular degeneration between 2018 and 2022. Demographic data and peripheral complete blood count were obtained from the electronic medical record system. The most recent best-corrected visual acuity, central macular thickness, and subfoveal choroidal thickness values (within one month) for complete blood count were obtained from case sheets and the optical coherence tomography digital image database. The systemic immune-inflammatory index, neutrophil-to-lymphocyte ratio, and platelet-to-lymphocyte ratio were calculated. Age- and sex-matched controls were also generated.
Thirty-three patients (23 males, 10 females) with wet-type age-related macular degeneration and 43 controls (24 males, 19 females) were included. The groups were similar in terms of age and sex (78.0 ± 6.3 vs. 75.6 ± 6.6 years, p = 0.59; p = 0.38 for sex). The systemic immune-inflammatory index was higher in the wet-type age-related macular degeneration group (460.5 vs. 440.4); however, this difference was not statistically significant. When the correlations between the systemic immune-inflammatory index, platelet-to-lymphocyte ratio, neutrophil-to-lymphocyte ratio, best-corrected visual acuity (logMAR), central macular thickness, and subfoveal choroidal thickness were examined, there was only a moderate positive correlation between best-corrected visual acuity and platelet-to-lymphocyte ratio (r = 0.46, p = 0.007).
There were no differences in the systemic immune-inflammatory index, neutrophil-to-lymphocyte ratio, and platelet-to-lymphocyte ratio between the wet-type age-related macular degeneration and control groups. There was a positive correlation between the platelet-to-lymphocyte ratio and best-corrected visual acuity (logMAR). The systemic immune-inflammatory index was higher in patients with wet-type age-related macular degeneration than in the control group; however, this difference was not statistically significant.