Fig. 1

Principal component plot of samples indicating that women clustered into two groups, while men clustered in one, and the effects due to gender and individual differences were much larger than those due to the meal intake and oat bran intake. The digits represent subject identification number (men 1–3, 5–6 and women 11–15), ‘oat’ represents the occasion when the oat bran meal was eaten, and ‘c’ the occasion when the control meal was eaten, ‘M’ represents man and ‘W’ woman. Green colour represents 2 h after oat bran intake and red colour represents 2 h after control intake. X- and Y-axes represent the 1st and 2nd principal components, respectively