Abstract
Nutrition plays an important and modifiable role in bone health. This study aimed to investigate the effect of dietary diversity on the risk of any type of fracture in adults. Data from the China Health and Nutrition Survey collected between waves 1997 and 2015 were used. A total of 10,192 adults aged 40 years and older were included in the analysis. Both dietary diversity score (DDS) based on Chinese dietary guidelines (DDS-CDG) and minimum dietary diversity for women (DDS-MDD-W) were computed. Cox proportional hazards regression models were conducted to determine the association. Stratified analyses were conducted in women by the age of fracture using the case-control study approach. In men, higher scores in both the DDS-CDG (hazard ratio (HR) 0.70, 95% CI 0.56–0.88) and DDS-MDD-W (HR 0.67, 95% CI 0.54–0.82) were associated with decreased risk of fracture, however, the associations were not significant in women (DDS-CDG: HR 0.94, 95% CI 0.79–1.12; DDS-MDD-W: HR 0.93, 95% CI 0.79–1.09). In the stratified analyses, higher DDS-CDG (odds ratio (OR) 0.74, 95% CI 0.58–0.95) and higher DDS-MDD-W (OR 0.76, 95% CI 0.60–0.95) were associated with lower risks of fracture in women aged 40 to 60 years; in women aged over 60 years, no association was observed (DDS-CDG: OR 1.10, 95% CI 0.83–1.46; DDS-MDD-W: OR 1.00, 95% CI 0.79–1.27). In summary, higher dietary diversity was associated with decreased risk of fracture in men and middle-aged women, but not in women aged over 60 years.
Highlights
Bone fractures in elderly people are often related to increased morbidity and mortality, which is an important public health issue [1,2]
Higher dietary diversity was associated with decreased risk of fracture in men and middle-aged women, but not in women aged over 60 years
Both in men and women, individuals living in southern China, living in urban areas, having higher education and income, who were non-smokers, having lower physical activity level, having higher BMI, and having a history of diabetes tended to have higher scores in both the dietary diversity score (DDS)-Chinese dietary guidelines (CDG) and DDS-MDD-W
Summary
Bone fractures in elderly people are often related to increased morbidity and mortality, which is an important public health issue [1,2]. Multiple factors are known to be associated with fracture, including aging, genes, nutrition, physical activity, etc. Among these factors, nutrition plays an important and modifiable role in bone health and fracture prevention and recovery [7,8]. A meta-analysis showed that increased intake of vegetables was associated with a lower risk of hip fracture [11]. Considering that our diet is complex, it is important to consider the association between fracture and diet as a whole
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