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Fig. 2 | Environmental Health

Fig. 2

From: Assessing urinary flow rate, creatinine, osmolality and other hydration adjustment methods for urinary biomonitoring using NHANES arsenic, iodine, lead and cadmium data

Fig. 2

Sensitivity of Pearson correlations to Araki’s b value for NHANES 2009–2012 (CDC, 2015) training data for Pb (a), Cd (b), AsIMM (c) and I (d) for criterion A (urinary analyte versus UFR, blue lines) and criterion B (urinary analyte versus blood analyte, red lines) with 95 % confidence intervals (grey lines). Optimum criterion A (blue diamonds) and criterion B (red diamonds) Araki’s b values are displayed and, in the case of Pb and Cd, the difference between these values is highlighted by double-headed arrows. Single-headed arrows illustrate the improvement in criterion A (decreasing correlation) and criterion B (increasing correlation) correlations relative to the equivalent Araki’s b value implicit of ER

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Environmental Health

ISSN: 1476-069X