Study: Liver disease increases as result of lifestyle changes due to COVID-19

Liver disease was negatively impacted by lifestyle changes during the first year of the pandemic, according to a new study in the journal Liver International.

The retrospective study used health checkup data of 973 participants between 2018 and 2020 from MedCity21, an advanced medical center for preventive medicine established by Osaka City University Hospital in 2014, and found that new diagnoses of metabolic dysfunction-associated fatty liver disease (MAFLD) rose from 22 before the COVID pandemic to 44 during the pandemic.

“Before the pandemic, we found routine late-night meals, or dinner two hours before bedtime, as an independent lifestyle predictor of developing MAFLD,” states Hideki Fujii, first author of the study, “however, analysis showed higher daily alcohol intake as an independent predictor of the disease during the pandemic.”

Pre-pandemic

Researchers analyzed the lifestyle habits of the 22 patients who developed MAFLD between July 2018 and December 2019, which included alcohol intake, exercise, sleep duration, meals per day, and late-night meals. Through a univariate and multivariate analysis of the data to control for potential risk factors like age, sex, etc., they found only the proportion of late-night meals as significantly higher, marking this as an independent predictor of developing MAFLD.

During pandemic

Between December 2019 and December 2020, in the additional 44 patients who developed MAFLD, researchers found a jump in alcohol intake mainly among patients less than 60 years of age. “This represents a major proportion of the working-age population,” says Dr. Fujii, “suggesting a need to more closely monitor and address this life-style change as the pandemic continues.” Also, the proportion of smokers and those who ate 2 meals a day instead of 3 were higher in those who developed MAFLD during the pandemic.

“Our data is drawn from individuals who, after undergoing abdominal ultrasonography in 2018, returned for routine follow-ups until 2020,” explains Dr. Fujii. While the research team is aware that this suggests most participants were healthy enough to engage in work and were sufficiently health conscious to voluntarily undergo health checkups, “we were curious about the impact COVID-19, and its associated “new normal” lifestyles, had on incidences of MAFLD,” continues Dr. Fujii—something that has remained until now, unknown.

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