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Table 4 Macular pigment optical density variables (volume, area, maximum and mean) and their correlations with ethnicity

From: Macular pigment optical density in a Brazilian sample

Variable White × black White × biracial Black × biracial
p p p
MPOD volume < 0.001* 0.907 < 0.001*
MPOD area 0.003* 0.331 < 0.001*
Max MPOD < 0.001* 0.850 < 0.001*
Mean MPOD < 0.001* 0.359 < 0.001*
  1. Mann–Whitney test for independent data with a 95% confidence interval
  2. MPOD, macular pigment optical density; max, Maximum
  3. *Level of significance of p < 0.05