POPs exposure was assessed as tertiles of the distribution (based on the nondiabetics at each sampling occasion), which relax the linearity assumption, as well as on the continuous scale (per 1 SD increment) to determine if there is an overall trend (presented as P trend ).
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Persistent Organochlorine Pollutants in Plasma, Blood Pressure, and Hypertension in a Longitudinal Study.
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The OR for the sum of NDL-PCBs did not reach statistical significance, and there were not enough studies for HCB.