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. 2018 Oct 11;10:321. doi: 10.3389/fnagi.2018.00321

FIGURE 5.

FIGURE 5

Graphical representation of participant’s T-scores distribution in the Mental Health sub-questionnaire, and comparison with US population. An independent samples t-test showed that the scores in the Mental Health index of all BBHI participants (N = 4206; mean = 49.8; SD = 6.9) do not differ significantly from reference scores of the general US population (values taken from PROMIS Global health scoring Manual: mean = 50; SD = 10; t = 1.7, p = 0.10).