| http://www.w3.org/ns/prov#value | - We also performed exploratory analysis testing for interactions between urine dopamine and age, sex, race, and CKD, defined as eGFR <60 ml/min/1.73 m2 versus higher.All analyses were conducted using STATA (version 11, College Station, Tex., USA). p values <0.05 were considered statistically significant for all analyses including interaction terms.
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