全身免疫炎症指数(SII)是一种新型的炎症指标。然而,没有研究报道SII对金属和总脂肪(TOFAT)之间的关联的影响.我们旨在研究SII对美国成年人群尿金属与TOFAT之间关系的介导作用。这项横断面研究是在具有SII完整信息的成年人中进行的,尿液金属浓度,和TOFAT来自2011-2018年国家健康和营养检查调查(NHANES)。使用多因素逻辑回归和有限的三次样条来探索尿液金属水平与TOFAT之间的关联。此外,连续中介分析用于研究SII对金属和TOFAT的中介作用。总共3324名受试者被包括在该研究中。在调整了混杂因素后,砷(As),镉(Cd),钴(Co),铯(Cs),无机汞(Hg),钼(Mo),锰(Mn),铅(Pb),锑(Sb),和th(Tl)的TOFAT比值比呈负降低趋势(趋势均P<0.05)。在总人口中,我们发现Cd,Co,和Tu与SII呈正相关(β=29.70、79.37和31.08),而As和Hg与SII呈负相关。中介分析表明,SII介导了Co与TOFAT的关联,中介效应的β为0.9%(95CI:0.3%,1.6%)。我们的研究结果表明,暴露于As,Cd,汞会直接降低TOFAT的水平。然而,公司会增加TOFAT,完全由SII介导,主要作用于女性而不是男性。
Systemic Immune Inflammatory Index (SII) is a novel indicator of inflammation. However, no studies have reported the effect of SII on the association between metals and total fat (TOFAT). We aim to investigate the mediated effect of SII on the relationship between urinary metals and TOFAT in a US adult population. This cross-sectional study was conducted among adults with complete information on SII, urine metal concentrations, and TOFAT from the 2011-2018 National Health and Nutrition Examination Survey (NHANES). Multifactorial logistic regression and restricted cubic splines were used to explore the association between urine metal levels and TOFAT. Furthermore, serial mediation analyses were used to investigate the mediating effect of SII on metals and TOFAT. A total of 3324 subjects were included in this study. After adjusting for confounders, arsenic (As), cadmium (Cd), cobalt (Co), cesium (Cs), inorganic mercury (Hg), molybdenum (Mo), manganese (Mn), lead (Pb), antimony (Sb), and thallium(Tl) had negative decreased trends of odds ratios for TOFAT (all P for trend < 0.05). In the total population, we found that Cd, Co, and Tu were positively associated with SII (β = 29.70, 79.37, and 31.08), whereas As and Hg had a negative association with SII. The mediation analysis showed that SII mediated the association of Co with TOFAT, with the β of the mediating effect being 0.9% (95%CI: 0.3%, 1.6%). Our findings suggested that exposure to As, Cd, and Hg would directly decrease the level of TOFAT. However, Co would increase TOFAT, completely mediated by SII, mainly exerted in females rather than males.