Characteristics of the Rice Group, the Both Group, and the Bread Group.

Rice group: Subjects who habitually ate boiled white rice for breakfast.Both group: Subjects who habitually ate both boiled white rice and white bread for breakfast.Bread group: Subjects who habitually ate white bread for breakfast.a: Significance levels were evaluated with the Scheffe test if the analysis of variance was significant.b: Comparison between the rice group and the both group.c: Comparison between the rice group and the bread group.d: Comparison between the both group and the bread group.eSocioeconomic status is divided as follows; annual income below 2 million yen (∼20,000 US dollars), 1; 2–4 million yen, 2; 4–6 million yen, 3; 6–8 million yen, 4; 8 –10 million yen, 5; 10–12 million yen, 6; ≥12 million yen, 7.