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Figure. Variations in mean chewing frequency by food type and genetic status (in subjects either with or without Down syndrome). The n values, means, and standard deviations are presented in Table 1 . The group with Down syndrome demonstrated a significantly poorer mean chewing frequency for all foods except purée when compared with the reference group. Probability of the mean chewing frequency for the group with Down syndrome and the reference group being in the same distribution as tested by t test: ***p 0.001, **p 0.01, *p 0.05, ns = difference non-significant.
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