Fig. 1

Comparison of T score among groups according to frequency of fish food intake. a The results of comparison of T score among groups according to Model 1 (Model 1: frequency of fish food intake were categorized by group 1: seldom, group 2: once or twice per week, group 3: once per 2 days, and group 4: always). The mean T score was −1.36, −1.23, −1.26, and −0.97 in the four groups, respectively. There were significantly differences among the three groups (P = 0.024). b The results of comparison of T score among groups according to Model 2 (Model 2: frequency of fish food intake were categorized by group 1: seldom, group 2: sometimes, group 3: always). The mean T score was −1.36, −1.24, and −0.97 in the three groups, respectively. There were significantly differences among the three groups (P = 0.010). c The results of comparison of T score between groups according to Model 3 (Model 3: frequency of fish food intake were categorized by low frequency and high frequency groups). The mean T score was −1.25 and −1.18 in the two groups, respectively. There were no significant differences between the two groups (P = 0.231)