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Table 3 Spearman correlation coefficients for relationships between biomarkers and 139-group and 20-group diet quality scores

From: Development of a short food frequency questionnaire to assess diet quality in UK adolescents using the National Diet and Nutrition Survey

Biomarker 139-group Diet Quality Score 20-group Diet Quality Score
rS p-value n rS p-value n
25-Hydroxy Vitamin D (nmol/L) 0.14 <  0.001 874 0.11 0.001 874
Holotranscobalamin (pmol/L) 0.22 0.004 171 0.12 0.10 171
Vitamin B12 (pmol/L) 0.21 < 0.001 872 0.15 < 0.001 872
Homocysteine (μmol/L) −0.25 < 0.001 609 −0.18 < 0.001 609
Vitamin C (μmol/L) 0.30 < 0.001 845 0.27 < 0.001 845
Lutein (μmol/L) 0.24 < 0.001 862 0.23 < 0.001 862
Alpha-Cryptoxanthin (μmol/L) 0.23 < 0.001 862 0.20 < 0.001 862
Beta-Cryptoxanthin (μmol/L) 0.35 < 0.001 861 0.34 < 0.001 861
Lycopene (μmol/L) 0.10 0.002 861 0.09 0.006 861
Beta-Carotene (μmol/L) 0.24 < 0.001 861 0.18 < 0.001 861
Alpha-Carotene (μmol/L) 0.19 < 0.001 861 0.17 < 0.001 861
Total carotenoids (μmol/L) 0.25 < 0.001 861 0.21 < 0.001 861
Total serum folate (nmol/L) 0.42 < 0.001 177 0.39 < 0.001 177
Urinary sodium concentration (mmol/L) −0.14 < 0.001 997 −0.14 < 0.001 997
Urinary potassium (mmol/L) 0.06 0.08 997 0.03 0.32 997