The relationship between dietary niacin intake and the incidence of all-cause and cardiovascular mortality among chronic kidney disease patients.

BACKGROUND

Chronic kidney disease (CKD) is a major cause of human mortality and cardiovascular disease (CVD)-related death. Niacin can treat dyslipidemia and can lower overall cardiovascular event incidence and mortality rates. The present study was designed to clarify the link between dietary consumption of niacin and cardiovascular mortality.

METHODS

This study enrolled subjects ≥18 years of age from the National Health and Nutrition Examination Survey 2009-2014 and excluded any individuals for whom data regarding their CKD status, dietary niacin intake, or other covariate information was unavailable. Relationships between dietary niacin intake levels and overall or CVD-related mortality among these CKD patients were assessed using univariate and multivariate Cox regression analyses.

RESULTS

The study included 1,798 subjects and recorded 514 and 186 instances of all-cause and cardiovascular death, respectively. Males comprised 51.8 % of the study cohort, and the mean age of these subjects was 65. Cox proportional hazard model analyses revealed no relationship between dietary niacin intake and all-cause or cardiovascular death risk among the overall CKD patient population (P > 0.05). However, in age-stratified analyses, those subjects <60 years of age exhibiting the highest levels of dietary niacin consumption (≥ 38 mg/day) were found to face a significantly higher risk of all-cause mortality, and this association remained intact in sensitivity analyses.

CONCLUSION

These results do not support any link between the dietary intake of niacin and all-cause or cardiovascular mortality risk among patients with CKD. Age and niacin intake exhibited a significant interaction related to all-cause mortality.