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. 2025 Jun 19:12:1609759.
doi: 10.3389/fnut.2025.1609759. eCollection 2025.

Do serum vitamins, carotenoids, and retinyl esters influence mortality in osteoarthritis? Insights from a nationally representative study

Affiliations

Do serum vitamins, carotenoids, and retinyl esters influence mortality in osteoarthritis? Insights from a nationally representative study

Yifan Lu et al. Front Nutr. .

Abstract

Background: The relationship between serum vitamins, carotenoids, and retinyl esters and mortality risk among individuals with osteoarthritis (OA) remains unclear. This study aimed to investigate these associations.

Methods: Based on data from NHANES 2001 to 2018 and the National Death Index (NDI), a total of 3,626 patients with OA were included. Cox proportional hazards models were used to evaluate the associations between serum nutrient levels and all-cause, cardiovascular, and cancer mortality. Nonlinear effects were assessed using smooth curve fitting and piecewise regression models. Subgroup analyses, sensitivity analyses, and validation in non-OA populations were conducted. Additionally, interactions between vitamin levels and OA status were examined.

Results: Higher levels of vitamin D, retinyl palmitate, and stearic acid were associated with a reduced risk of all-cause mortality in patients with OA, with consistent results in sensitivity analyses. A nonlinear inverse association was observed between vitamin D and all-cause mortality in women, with a threshold at 30.5 nmol/L. Vitamin C was associated with cardiovascular mortality, while retinyl palmitate and stearic acid were linked to a reduced risk of cancer-related death. The protective effect of vitamin D was stronger among individuals with lower educational levels. In the non-OA population, only vitamin D was associated with mortality. Interaction analysis indicated that high vitamin levels may attenuate the adverse impact of OA on mortality risk.

Conclusions: Elevated serum levels of vitamin D, retinyl palmitate, and stearic acid may be associated with reduced all-cause and cause-specific mortality among individuals with OA, highlighting their potential role in the management of OA.

Keywords: NHANES; carotenoids; mortality; osteoarthritis; serum vitamins.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
Flow chart (vitamin D).
Figure 2
Figure 2
Kaplan–Meier curves for the associations between serum vitamin and retinyl ester levels and mortality risk in patients with osteoarthritis. (A) Vitamin D and all-cause mortality; (B) retinyl palmitate and all-cause mortality; (C) retinyl stearate and all-cause mortality; (D) vitamin C and cardiovascular mortality; (E) retinyl palmitate and cancer mortality; (F) retinyl stearate and cancer mortality.
Figure 3
Figure 3
The association between serum vitamin, carotenoid, and retinyl ester levels and mortality risk in patients with OA.

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