A study of 47 organic and 67 conventional tea smallholders in rural Sri Lanka found that long-term organic farmers maintained higher dietary diversity measures than conventional farmers following a 2021 inorganic fertilizer ban.
The study authors argue that determining the minimum cut-off for dietary diversity measurement is an essential, under-researched subject in public health.
Annalijn I Conklin et al. conclude that there is an urgent need for standardization of dietary diversity as a research agenda to advance nutrition and food science.
Dietary diversity measurement is a tool used to assess the quality of food consumed at the population level and is endorsed by many international agencies.
Individuals aiming for higher dietary diversity should actively reduce their exposure to sweetness.
Significant measures of dietary diversity include Household Dietary Diversity Score (HDDS) and Individual Dietary Diversity Score (IDDS).
Consumers who prefer sweetness are expected to exhibit lower dietary diversity, which contributes to the association between sweetness preference and poorer health outcomes.
Consumer preference for saltiness has a positive impact on dietary diversity, according to a study using data from the Rural Development Administration of South Korea.
The study authors suggest that further research is needed to determine appropriate minimum intake requirements for different populations to identify differences among them.
A significant interaction between time and energy (p < 0.0001) was noted for both evenness and dissimilarity scores in a study of dietary diversity across adulthood.
In the scoping review by Annalijn I Conklin et al., the 208 whole-diet dietary diversity measures were operationalized as 5-6 major food groups alone (n = 23) or in combination with subgroups or items (n = 131).
The mean total dietary diversity score across measures in the scoping review by Annalijn I Conklin et al. was 21.99 items or groups (median, 10; range, 1-248).
In the 2017 behavioral observation data set for bonobos, the consumption of fruit, leaf, and flower items was not associated with seasonal food availability.
The scoping review by Annalijn I Conklin et al. conducted a systematic search of peer-reviewed and gray literature using 5 bibliographic databases, organizational websites, and hand-searches for food variety, dietary diversity, and balanced or mixed diet in developed settings.
In the scoping review by Annalijn I Conklin et al., over half of the 114 within-group diversity measures assessed fruit and/or vegetable diversity, 25% assessed meat/alternatives diversity, 10% assessed grain diversity, and 8% assessed dairy diversity.
There is a growing concern that current dietary diversity measures lack sensitivity because they omit a minimum food consumption threshold for counting food groups in the dietary diversity score.
Dietary diversity varies across populations of the same species and across time, which is critical for understanding how primate diets change over time.
Frugivorous primates, such as bonobos, are valuable for examining dietary diversity and testing foraging models because they eat a variety of species and are subject to seasonal shifts in fruit availability.
In the scoping review by Annalijn I Conklin et al., 75% of all dietary diversity measures used simple counting, while others used weighting (n = 11), categorization (n = 37), or relative proportion (n = 25).
In a study of dietary diversity across adulthood, dissimilarity scores showed significant interactions of time × race (p = 0.0005) and time × poverty status (p = 0.0325), indicating a slower rate of increase in dissimilarity scores among Whites compared with African–Americans and those with income >125% poverty versus <125% poverty.
The study concluded that using a 10-gram minimum intake threshold strengthens the relationship between dietary diversity and nutritional adequacy.
Using long-term consumer panel data to calculate household-level dietary diversity is a more comprehensive and data-driven approach than using short-term memory recall surveys.
The study by Trias Mahmudiono et al. utilized a cross-sectional design involving 55 samples from two villages: one agricultural and one fishpond/coastal area.
Agricultural production diversification is often viewed as a strategy for smallholder farmers to improve dietary diversity and nutritional status, though existing evidence remains inadequate.
Consumer preference for sweetness has a negative impact on dietary diversity, according to a study using data from the Rural Development Administration of South Korea.
The scoping review by Annalijn I Conklin et al. identified 941 publications eligible for inclusion and randomly sampled 20% (n = 190) for data extraction.
Daniela Casale et al. (2019) found a low correlation between measures of dietary diversity based on simple counts of food items or groups and the Healthy Food Diversity Index in one-year-olds.
In the scoping review by Annalijn I Conklin et al., only 14% of the dietary diversity measures were validated.
Mixed-effects linear regression models were used to test changes in dietary diversity across adulthood, adjusting for sex, race, poverty status, and education as fixed effects, and adjusting for smoking, age, and energy as time-dependent variables.
For smallholder households with higher income levels and well-developed markets, market access and trade have more potential to improve dietary diversity than agricultural production diversification.
Dietary diversity is an established pillar of healthy eating in dietary guidelines, but definitions, measurement, and meanings vary across settings.
Anna Herforth and colleagues published an abstract in Current Developments in Nutrition on June 1, 2019, regarding the development of a Diet Quality Questionnaire for improved measurement of dietary diversity and other diet quality indicators.
When applying a 10-gram minimum intake, there was a statistically significant difference in children's dietary diversity between agricultural and fishpond family groups (p = 0.024).
Measures of dietary diversity that capture the healthiness of foods and their distribution are potentially more useful for understanding children's dietary patterns than measures that only count the number or variety of foods.
Lucas Gosdin and colleagues published an abstract in Current Developments in Nutrition on June 1, 2019, stating that dietary diversity measures derived from food frequency methods are weak proxies for anthropometric indicators of child nutrition in East Africa.
Behavioral observation data sets yielded significantly higher dietary diversity indices for bonobos than fecal washing data sets.
In the scoping review by Annalijn I Conklin et al., 54% of the literature on dietary diversity used food-frequency questionnaires.
Frequent exposure to sweetness fosters a preference for sweetness, which negatively impacts dietary diversity because sweetness preference is a learned behavior.
Participation in contract farming is positively associated with household dietary diversity and diet quality among rice-producing households in Senegal.
The scoping review by Annalijn I Conklin et al. identified a total of 322 measures of dietary diversity, of which 208 assessed whole-diet diversity and 114 measured within-group diversity.
When omitting a 10-gram minimum intake, there was no statistically significant difference in children's dietary diversity between agricultural and fishpond family groups (p = 0.184).
Dietary diversity is a useful tool that allows dietary comparisons across differing sampling locations and time periods.
The study findings emphasize the need for a minimum portion size to strengthen the results of dietary diversity measurements.
In the scoping review by Annalijn I Conklin et al., literature on dietary diversity published since 1985 originated primarily from Asian (n = 88, 46%) and Anglo-European (n = 47, 25%) countries.