Journal Article

Exploring the link: Systemic immune-inflammation index as a marker in endometriosis—Insights from the NHANES 2001–2006 cross-sectional study

Luo, Xiaohan, Wang, Xiaohui, Peng, Liang, Cao, Baodi

2024

Overview

The systemic immuno-inflammatory index (SII), a novel immune marker of inflammation, has not been previously associated with endometriosis. The objective of this research is to explore the link between SII and the occurrence of endometriosis. Utilizing data from the National Health and Nutrition Examination Survey (NHANES) spanning 2001 to 2006, we screened and extracted relevant information from the population. Participants missing data on either SII or endometriosis were excluded. We divided the remaining cohort into quartiles based on SII levels: Q1 (SII < 249, n = 848), Q2 (249 ≤ SII < 604.55, n = 847), Q3 (604.55 ≤ SII < 825.35, n = 847), and Q4 (SII ≥ 852.35, n = 848). Multiple linear regression and smooth curve fitting techniques, were to evaluate the non-linear association between SII and endometriosis. The study included 3,390 adults aged 20 to 55. Multiple linear regression analysis revealed a significant positive correlation between SII and endometriosis [3.14, 95% CI (2.22, 4.45), P < 0.01]. This correlation was consistent across subgroups defined by marital status, poverty income ratio, BMI, alcohol consumption, and age at first menstrual period. However, the relationship between SII and endometriosis was significantly modified by age, education, and history of pregnancy in the stratified analyses. The curve fitting indicated an S-shaped curve, with an inflection point at SII = 1105.76. The SII may serve as a predictive marker for endometriosis risk among women in the United States, offering a potentially simple and cost-effective approach. However, given the cross-sectional design of this investigation, further validation in prospective studies is necessary.

• Publisher: Public Library of Science
• Subject: Adult / Age / Analysis / B cells / Biology and Life Sciences / Biomarkers / Blood platelets / Body mass index / Chronic obstructive pulmonary disease / Cross-Sectional Studies / Curve fitting / Development and progression / Disease prevention / Divorce / Educational attainment / Endocrine therapy / Endometriosis / Endometriosis - epidemiology / Endometriosis - immunology / Family income / Female / Health surveys / Humans / Inflammation / Lymphocytes / Marital status / Medicine and Health Sciences / Menarche / Menstruation / Middle Aged / Missing data / Neutrophils / Nutrition Surveys / Poverty / Pregnancy / Questionnaires / Ratios / Regression analysis / Reproductive health / Risk assessment / S curves / Secondary schools / Social Sciences / Subgroups / Surveys / United States - epidemiology / Variables / Womens health / Young Adult