The association between creatinine to body weight ratio and the risk of progression to diabetes from pre-diabetes: a 5-year cohort study in Chinese adults

The De Ritis ratio mediates the association between creatinine-to-body weight ratio and normoglycemic conversion in Chinese health examinees

To assess the associations between the creatinine-to-body weight (Cre/BW) ratio and reversion to normoglycemia mediated by the aspartate aminotransferase-to-alanine aminotransferase (De Ritis) ratio. This retrospective cohort study included 24,884 prediabetic participants from health check-ups in 32 regions across 11 Chinese cities. We employed multivariable Cox regression to assess time-to-event outcomes, smooth curve fitting for trend analysis, and inflection point analysis to determine critical thresholds. Subgroup analyses were performed to explore interactions. Mediation analysis was conducted to clarify the mechanisms linking prediabetes with health outcomes. In the analysis of 24,884 individuals, it was observed that 49.08% of the prediabetic subjects experienced normoglycemic conversion during a follow-up period spanning 73,517.66 person-years. Following full adjustment, the Cre/BW ratio was positively associated with normoglycemic conversion among prediabetic individuals (HR 1.42, 95% CI 1.30-1.55). Multivariate smooth spline analysis revealed a nonlinear relationship between the Cre/BW ratio and glucose status conversion (P for nonlinearity < 0.05), with the curves leveling off when the Cre/BW ratio (×100) reached 1.34. Subgroup analysis and additional sensitivity analyses confirmed that the results between the Cre/BW ratio and glucose status conversion were robust. Additionally, the De Ritis ratio was found to explain 50% of the association between the Cre/BW ratio and the prediabetes-to-normoglycemia transition. A higher Cre/BW ratio was associated with a better chance of controlling blood glucose levels in prediabetic individuals, with the De Ritis ratio playing a key mediating role.

Association of thyroid hormones with the severity of chronic kidney disease: a cross-sectional observational study at Tabuk, Saudi Arabia

Background

The interplay between chronic kidney disease (CKD) and thyroid dysfunction is becoming more evident in the biomedical community. However, the intricacies of their relationship warrant deeper investigation to understand the clinical implications fully.

Objective

This study aims to systematically evaluate the correlation between thyroid hormone levels, including thyroid-stimulating hormone (TSH), triiodothyronine (T3), and thyroxine (T4), and markers of renal disease severity. These markers include serum creatinine, urea, and parathyroid hormone (PTH) levels in individuals diagnosed with CK).

Methods

We conducted a cross-sectional observational study involving a cohort of 86 participants with CKD recruited from the renal clinic at King Fahad Hospital in Tabuk. Biochemical parameters, encompassing plasma electrolytes and thyroid hormone concentrations, were quantitatively assessed. These measurements were performed with the aid of a Roche Cobas E411 analyzer. The Pearson correlation coefficient was employed to delineate the strength and direction of the associations between the thyroid function markers and renal disease indicators.

Results

The statistical analysis highlighted a generally weak correlation between the concentrations of thyroid hormones and the indicators of renal disease severity, with Pearson correlation coefficients between -0.319 and 0.815. Critically, no significant correlation was found between creatinine and thyroid hormones (TSH, T3, T4), nor was any substantial correlation between urea and thyroid hormones. Conversely, a robust positive correlation was noted between the levels of parathyroid hormone and serum creatinine (r = 0.718, p < 0.001).

Conclusion

The data suggests that thyroid hormone levels have a minimal correlation with the severity of renal disease markers. In contrast, the pronounced correlation between PTH and creatinine underscores the importance of considering PTH as a significant factor in managing and therapeutic intervention of CKD complications. These initial findings catalyze further research to thoroughly investigate the pathophysiological relationships and potential therapeutic targets concerning thyroid dysfunction in patients with renal impairment.