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. 2022 Dec 20;153(1):76–87. doi: 10.1016/j.tjnut.2022.10.010

FIGURE 5.

FIGURE 5

Comparison of vitamin A deficiency (VAD) based on serum and liver retinol concentrations in 129 male Mongolian gerbils fed a variety of feeds and supplements. The vertical dashed line represents the cutoff for VAD based on 0.10 μmol/g liver. The horizontal line represents the cutoff for VAD based on a serum retinol concentration of 0.70 μmol/L. Data in the top right quadrant are considered to be adequate VA status by both serum and liver retinol concentrations (96 true negative), whereas the ones in the upper left quadrant are considered adequate by serum retinol but deficient by liver retinol concentrations (30 false negative). In the lower left quadrant, the data points are considered deficient by both serum and liver concentrations (4 true positive), whereas those in the lower right quadrant are considered deficient by serum retinol but not by liver retinol concentrations (0 false negative). VAD, vitamin A deficiency.