How Diverse Diets Can Protect Your Vision and Hearing in Old Age
A recent investigation into the diets of the oldest adults in China has uncovered a fascinating link between dietary diversity and sensory health. With over 10,000 participants aged 80 and older, the research utilized a Dietary Diversity Score (DDS) to measure the variety in participants' diets. The findings indicate that those with a more varied diet had a significantly lower risk of visual impairment and dual sensory impairments (both vision and hearing loss). The DDS ranged from 1 to 11, with higher scores representing a wider range of food groups consumed.
For those with a higher DDS, the likelihood of experiencing visual impairment was notably reduced. Specifically, individuals with a DDS of 4 or more had an 18% lower risk of visual impairment and a 25% lower risk of dual sensory impairment compared to those with a DDS below 4. However, no significant association was found between dietary diversity and hearing impairment alone. These results suggest that a varied diet, rich in different nutrients, plays a crucial role in maintaining sensory health as we age.
This research underscores the importance of maintaining a diverse diet, especially in the later years of life. By ensuring a variety of nutrients through diverse food choices, older adults can potentially preserve their vision and overall sensory health, enhancing their quality of life. This study provides valuable insights for dietary recommendations aimed at promoting healthy aging.
Article Information
Association of vision and hearing impairment and dietary diversity among the oldest old in China: findings from the Chinese longitudinal healthy longevity survey
Published in BMC Public Health. Xinyue Shen et al.
Abstract
Background: The presence of sensory impairment among older age cohorts exerts a significant impact on both individuals and society generally. Although the impact of dietary patterns on health is vital across all stages of life, there still a paucity of comprehensive research on the association between dietary variety and sensory impairments.
Objective: To investigate the potential relationship between dietary diversity and the prevalence of visual and hearing impairment or dual sensory impairments (visual and hearing impairment) among the oldest old population.
Methods: This is a cross-sectional study relied on data obtained from the 2018 survey conducted by the Chinese Longitudinal Healthy Longevity Survey (CLHLS). Subjects aged 80 and older with complete vision and hearing data were included in the study. Multivariate logistic regression models were developed to examine the association between dietary components and visual and hearing impairment while controlling for age, gender, socioeconomic demographic factors, living habits, other food habits, and general health status.
Results: The study included 10,093 participants, with an average age of 92.29 ± 7.75 years. Vision and hearing function were assessed based on the ability to distinguish the direction of the break in the circle and the requirement for hearing aids, respectively. Upon controlling for confounding variables, individuals with a greater Dietary Diversity Score (DDS, the number of food groups, range: 1-11) had a reduced likelihood of experiencing visual impairment (odds ratio [OR] = 0.944, 95% confidence interval [CI], 0.915-0.974) and dual sensory impairment (OR = 0.930, 95% CI, 0.905-0.955). In comparison to the low dietary variety group (insufficient dietary diversity, DDS < 4), the high dietary diversity group (sufficient dietary diversity, DDS ≥ 4) exhibited a decreased risk of visual impairment (OR = 0.820, 95% CI, 0.713-0.944) and dual sensory impairment (OR = 0.751, 95% CI, 0.667-0.846). However, no statistically significant correlation was observed between dietary diversity and the presence of only hearing impairment (OR = 0.924, 95% CI, 0.815-1.047) (P < 0.05). CONCLUSIONS AND IMPLICATIONS: The synthesis of research findings suggests that following diverse dietary patterns and healthy nutritional practices may be an effective and affordable way to prevent age-related decline in visual impairment and dual sensory impairment.
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