Association between vitamin B6 metabolism and the prevalence of age-related macular degeneration: A cross-sectional analysis of National Health and Nutrition Examination Survey (NHANES)

Le résumé fourni par la source

B vitamins may be involved in the development of age-related macular degeneration (AMD). This investigation intended to examine the association between vitamin B6 catabolic status and the prevalence of AMD. Individuals ≥ 40 years old in the 2005 to 2008 National Health and Nutrition Examination Survey who had complete vitamin B6 measurement and AMD diagnostic data were included in this cross-sectional study. The catabolic status of vitamin B6 was evaluated using serum levels of pyridoxal 5'-phosphate (PLP) (the active form) and its metabolite 4-pyridoxic acid (4-PA). The analysis of 4-PA, PLP, and the 4-PA to PLP ratio (4-PA/PLP) used continuous variables and quartiles (Q1-Q4). The associations of 4-PA, PLP, and 4-PA/PLP with the prevalence of AMD were evaluated via weighted logistic regression, with odds ratio (OR) and 95% confidence interval (CI) estimates provided. Nonlinear relationships were explored utilizing restricted cubic splines. Of these 4202 included individuals, 549 were diagnosed with AMD and 3653 were non-AMD patients. High PLP levels (Q4 [≥ 55.475 nmol/L] vs Q1: OR [95% CI] = 0.69 [0.48-0.97]) were significantly associated with lower odds of AMD, whereas high 4-PA/PLP levels (Q3 [0.668-0.976]: OR [95% CI] = 1.57 [1.07-2.29]; Q4 [≥ 0.976]: OR [95% CI] = 2.00 [1.35-2.96]) were related to higher odds of AMD. The associations of PLP levels (Q4: OR [95% CI] = 0.49 [0.32-0.76]) and 4-PA/PLP levels (Q4: OR [95% CI] = 2.18 [1.27-3.75]) with the prevalence of AMD were observed only in individuals aged ≥ 65 years and not in those aged < 65 years. No significant association was found between 4-PA levels and the odds of AMD (P > .05). The restricted cubic splines curves demonstrated that the nonlinear relationships of 4-PA (Poverall = .002; Pnon-linear = .730) and PLP (Poverall < .001; Pnon-linear = .791) with the prevalence of AMD were not significant, whereas the levels of 4-PA/PLP (Poverall < .001; Pnon-linear < .001) had a significant nonlinear association with the prevalence of AMD. High 4-PA/PLP levels showed an association with high odds of AMD, suggesting that vitamin B6 catabolic status may influence the prevalence of AMD.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.