Trends in Diet Quality by the Diagnosis of Chronic Diseases in Korea, 2013-2021: A Nationwide Representative Study.

In the total population, the average KHEI score decreased before the COVID-19 pandemic (β, −0.46 [95% CI, −0.55, −0.36]), but increased during the pandemic (β, 1.24 [95% CI, 0.45, 2.02]), showing a significant trend change (β diff , 1.70 [95% CI, 0.92, 2.49]).

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On the positive side, there was an increasing trend in protein-rich food intake, a decreasing trend in sodium intake, and increasing scores for the proportion of energy intake from carbohydrates and fat.

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Results The weighted average KHEI score showed a declining trend in 2013-2019 (β, −0.46 [95% CI, −0.55, −0.36]) but an increasing trend in 2020-2021 (β, 1.24 [95% CI, 0.45, 2.02]), indicating a significant change in trend with the onset of the pandemic (β diff , 1.70 [95% CI, 0.92, 2.49]).

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