Background Red cell distribution width/albumin ratio (RAR) is thought to be associated with the prognosis of a variety of diseases, including diabetes and heart failure. To date, no studies have focused on the relationship between RAR and carotid plaque in patients with coronary heart disease (CHD). Methods A total of 10,267 patients with CHD were divided according to RAR quartiles (Q1: RAR ≤ 2.960; Q2: 2.960 < RAR ≤ 3.185; Q3: 3.185 < RAR < 3.441; Q4: RAR ≥ 3.441). Logistic regression was used to analyze the relationship between RAR and carotid plaques in CHD patients. The relationship between RAR and carotid plaques in according to sex, age and glucose regulation state groups were also assessed. Results Among the 10,267 participants, 75.43% had carotid plaques. After adjusting for confounding factors, RAR was found to be associated with carotid plaque formation (OR: 1.23; 95% CI 1.08–1.39). The risk of carotid plaque formation in the Q4 group was 1.24 times higher than that in the Q1 group. After multivariate adjustment, RAR was associated with the risk of carotid plaque in female (OR: 1.29; 95% CI 1.09–1.52). And the relationship between RAR and carotid plaques in patients younger than 60 years old (OR: 1.43; 95% CI 1.16–1.75) was stronger than that in those older than 60 years old (OR: 1.29; 95% CI 1.10–1.51). Under different glucose metabolism states, RAR had the highest correlation with the risk of carotid plaques in diabetes patients (OR: 1.28; 95% CI 1.04–1.58). Conclusions RAR was significantly related to carotid plaques in patients with CHD. In addition, the correlation between RAR and the incidence of carotid plaque in patients with CHD was higher in women and middle-aged and elderly patients. In patients with CHD and diabetes, the correlation between RAR and carotid plaque was higher. Graphical Abstract

BackgroundThyroid dysfunction is closely related to arrhythmia. However, the relationship between sensitivity to thyroid hormone and risk of arrhythmia remains unknown. This study aimed to investigate the association between the thyroid system complex index and risk of arrhythmia in patients with coronary heart disease (CHD). MethodsThis large, multi-center study included 28,413 patients with CHD. Central sensitivity to thyroid hormone was assessed by calculating the thyroid feedback quantile-based index (TFQI). Logistic regression was used to analyze the relationship between sensitivity to thyroid hormone and risk of arrhythmia. This study also assessed the relationship between sensitivity to thyroid hormone and risk of arrhythmia in different sexes, ages, and glucose regulation and blood lipid states. ResultsOf the 28,413 participants, 8,935 (31.4%) patients with CHD had arrhythmia. There was a remarkable association between TFQI and risk of arrhythmia (odds ratio [OR]: 0.783; 95% con dence interval [CI], 0.735-0.836). Furthermore, the association between the TFQI and risk of arrhythmia in women (OR: 0.731; 95% CI: 0.667-0.802) was stronger than that in men (OR: 0.894; 95% CI: 0.816-0.910), as well as higher in elder (OR: 0.779; 95% CI: 0.721-0.843) than middle-aged (OR: 0.789; 95% CI: 0.703-0.886) patients. Furthermore, the association was stronge in the state of diabetes (OR: 0.635; 95% 0.569-0.709) and dyslipidemia (OR: 0.706; 95% CI: 0.644-0.774). ConclusionThere is a remarkable association between sensitivity to thyroid hormone and risk of arrhythmia in patients with CHD, which is more pronounced among women and the elderly. The association is also stronger in patients with dyslipidemia or diabetes. Methods Study populationThis study was approved by the ethics committee of the Tianjin University of Traditional Chinese Medicine (TJUTCM-EC20190008), and the requirement for informed consent was waived. This study was registered with the Chinese Clinical Trial Registry (ChiCTR-1900024535) and ClinicalTrials.gov (NCT04026724). This large-scale and multi-center retrospective study included 107,301 patients with CHD who were hospitalized in the First

BackgroundThyroid hormone influences glucose homeostasis through central and peripheral regulations. So far, the association between thyroid hormone sensitivity and elevated blood glucose (EBG) in patients with coronary heart disease (CHD) remains unknown. The purpose of this study is to investigate the association between thyroid hormone sensitivity and risk of EBG in patients with CHD, and to further explore their association in different sexes and ages.MethodsThis large multicenter retrospective study included 30,244 CHD patients (aged from 30 to 80) between January 1, 2014 and September 30, 2020. The study calculated the parameters representing central and peripheral sensitivity to thyroid hormones. Central sensitivity to thyroid hormones was assessed by calculating the thyroid feedback quantile-based index (TFQI), thyroid stimulating hormone index (TSHI), and thyrotropin thyroxine resistance index (TT4RI), and peripheral sensitivity to thyroid hormones was evaluated by the ratio of FT3/FT4. Taking normal glucose tolerance (NGT) as a reference, participants with diabetes or prediabetes were assigned to the EBG group. The study used logistic regression to analyze the relationship between central and peripheral thyroid hormone sensitivity and EBG in CHD patients.ResultsAmong the 30,244 participants, 15,493 (51.23%) had EBG. The risk of EBG was negatively associated with TSHI (OR: 0.86; 95%CI: 0.85 to 0.87; P < 0.001), TT4RI (OR: 0.99; 95% CI: 0.99 to 0.99; P<0.001), TFQI (OR: 0.72; 95%CI: 0.70 to 0.73; P <0.001) and PTFQI (OR: 0.60; 95%CI: 0.58 to 0.61; P<0.001). Compared to males and people aged 60 and below, the OR value for EBG was lower in females and those aged over 60 years old. Conversely, EBG risk was positively associated with FT3/FT4 (OR: 1.25; 95% CI: 1.24 to 1.26; P <0.001) and in the sex-categorized subgroups, males had higher OR values than females.ConclusionsThis study shows that the increase in central thyroid hormone sensitivity is associated with the reduced risk of EBG in CHD patients, among which females and people aged over 60 years old are at higher risk.

BackgroundThyroid dysfunction is closely related to arrhythmia. However, the relationship between sensitivity to thyroid hormone and risk of arrhythmia remains unknown. This study aimed to investigate the association between the thyroid system complex index and risk of arrhythmia in patients with coronary heart disease (CHD).MethodsThis large, multi-center study included 28,413 patients with CHD. Central sensitivity to thyroid hormone was assessed by calculating the thyroid feedback quantile-based index (TFQI). Logistic regression was used to analyze the relationship between sensitivity to thyroid hormone and risk of arrhythmia. This study also assessed the relationship between sensitivity to thyroid hormone and risk of arrhythmia in different sexes, ages, and glucose regulation and blood lipid states.ResultsOf the 28,413 participants, 8,935 (31.4%) patients with CHD had arrhythmia. There was a remarkable association between TFQI and risk of arrhythmia (odds ratio [OR]: 0.783; 95% confidence interval [CI], 0.735–0.836). Furthermore, the association between the TFQI and risk of arrhythmia in women (OR: 0.731; 95% CI: 0.667–0.802) was stronger than that in men (OR: 0.894; 95% CI: 0.816–0.910), as well as higher in elder (OR: 0.779; 95% CI: 0.721–0.843) than middle-aged (OR: 0.789; 95% CI: 0.703–0.886) patients. Furthermore, the association was stronge in the state of diabetes (OR: 0.635; 95% 0.569–0.709) and dyslipidemia (OR: 0.706; 95% CI: 0.644–0.774).ConclusionThere is a remarkable association between sensitivity to thyroid hormone and risk of arrhythmia in patients with CHD, which is more pronounced among women and the elderly. The association is also stronger in patients with dyslipidemia or diabetes.