According to the team, the study targeted 6,725 people in the prefecture aged 40 and over who underwent health checkups. Results were based on data from a "Yamagata cohort study," which tracked individuals from 2009 to 2023. Subjects were categorised into four groups based on how often they ate ramen: "fewer than once a month," "once to three times a month," "once or twice a week", and "three or more times a week." The team studied the relations between the frequency of ramen consumption and mortality risk. Those who consumed ramen "three or more times a week" had a 1.52 times higher mortality risk compared to the "once or twice a week" group. However, the results were reportedly not statistically significant enough to declare it a "definite danger."