| http://www.w3.org/ns/prov#value | - However, the correlations between mean number of poor mental health days, mean number of poor physical health days, and self-rated health were still modest at best.The next objective was to determine whether physical or mental health was contributing greater variance to QOL. Adolescent QOL ratings were more strongly correlated with mental health days(r = .88) than with physical health days (r = .7
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