AI Article Synopsis
- The study investigates the link between dietary knowledge and muscle mass in Chinese individuals aged 60 and older, utilizing data from the China Health and Nutrition Survey from 2006 and 2011.
- There is a significant prevalence of low muscle mass (31.20%), especially among females, and those with lower muscle mass had notably lower dietary knowledge scores.
- While the cross-sectional results suggest that higher dietary knowledge correlates with lower odds of low muscle mass, the longitudinal analysis did not find a strong association, indicating the need for further research.
Article Abstract
Objectives: This study aims to explore the possible association between dietary knowledge and muscle mass in a Chinese population aged 60 years and above.
Design: Cross-sectional and longitudinal studies.
Setting: Data from the 2006 and 2011 China Health and Nutrition Survey (CHNS) were used for this study.
Participants: A total of 1487 Chinese participants (44.38% males) aged 60 and above in the 2006 survey were included in the cross-sectional study. From the same study population, a total of 1023 participants (46.82% males) with normal muscle mass on the interview date of 2006 were included in the longitudinal study.
Outcome Measures: Dietary knowledge was accessed by a validated CHNS questionnaire. Appendicular skeletal muscle mass was calculated using a validated anthropometric equation derived from a representative Chinese population. Based on the 2021 Chinese consensus on sarcopenia, the appendicular skeletal muscle mass was categorised as 'normal' or 'low' using sex-specific cut-off values.
Results: The prevalence of low muscle mass in the study population was 31.20%, with a higher prevalence in females (34.22%). People with low muscle mass have a significantly lower dietary knowledge score (mean difference: -1.74, 95% CI -2.20 to -1.29). In the cross-sectional analysis, one score higher in dietary knowledge score was associated with a 4% lower odds of low muscle mass (OR=0.96, 95% CI 0.93 to 0.99). Compared with people in the lowest quartile of dietary knowledge, people in the highest quartile have a 44% lower odds of low muscle mass (OR=0.56, 95% CI 0.35 to 0.91). In the longitudinal analysis, no significant association was found between dietary knowledge and low muscle mass, yet the upper 95% CI was close to one (HR=0.97, 95% CI 0.93 to 1.01).
Conclusions: Sufficient dietary knowledge may play a protective role in maintaining normal muscle mass in Chinese adults aged 60 or above.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10711816 | PMC |
| http://dx.doi.org/10.1136/bmjopen-2023-075964 | DOI Listing |
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