Latent classes of energy and nutrient intake and their associations with oxidative stress in rural older adults: a cross-sectional study

Meiman Li¹Weijuan Kong¹Ting Jiang²Yanhua Ning^2*

• ¹General Hospital of Ningxia Medical University, Yinchuan, China
• ²Ningxia Medical University, Yinchuan, China

Background Research indicates that diet correlates with oxidative stress; however, the influence of specific energy and nutrient classes has been scarcely studied. The purpose of this study is to investigate the categories of energy and nutrient intake among rural older adults through latent class analysis and to explore the association between each category and biomarkers of oxidative stress. Methods It is a cross-sectional study. Dietary information was obtained from three days of 24-hour dietary diaries. Levels of oxidative stress markers were measured from fasting venous blood samples. Latent class analysis was used to analyze energy and nutrient intake classes. Analysis of variance and post-hoc comparisons were used to examine the relationships between energy and nutrient classes and oxidative stress. Results This analysis was performed on 376 adults aged 65 years and older. The latent analysis category was found that energy and nutrient intake could be divided into three classes: Over-adequate Nutrition - High Energy (n = 141, 37.50 % to the total samples), Adequate Nutrition 2 - Low in Energy and Protein (n = 69, 18.35 % to the total samples), and Inadequate Nutrition (n = 166, 44.15% to the total samples). 8-iso-PGF2α (F=6.004, p = 0.003) and SOD (F=5.559, p = 0.004) are associated with different energy and nutrient latent classes. Conclusions This study explores how classes of energy and nutrients relate to oxidative stress in rural older adults. The findings provide a basis for future research on oxidative stress and nutrition in the elderly.