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Table 5 Validity coefficients (95 % confidence intervals) for the Riksmaten method, MiniMeal-Q and total plasma carotenoids and total plasma alkylresorcinols for women and men

From: Carotenoids and alkylresorcinols as objective biomarkers of diet quality when assessing the validity of a web-based food record tool and a food frequency questionnaire in a middle-aged population

 

Carotenoids

Alkylresorcinols

ρ (95 % CI)

Women

Men

Women + men

Women

Men

Women + men

ρRT

0.78 (0.58, 0.97)

0.66 (−0.32, 1a)

0.80 (0.63, 0,98)

0.66 (−1a, 1a)

0.73 (−1a, 1a)

0.69 (−1a, 0.97)

ρMT

0.62 (0.40, 0.79)

0.94 (−1a, 1a)

0.69 (0.53, 0.72)

0.75 (−0.16, 1a)

0.60 (−0.12, 1a)

0.68 (0.29, 1a)

ρBT

0.55 (0.29, 0.73)

0.24 (−0.01, 0.22)

0.44 (0.28, 0.58)

0.31 (−0.01, 0.38)

0.33 (−0.01, 0.39)

0.30 (0.03, 0.53)

  1. Abbreviations: ρ validity coefficient, ρRT validity coefficient for the Riksmaten method, ρMT validity coefficient for MiniMeal-Q, ρBT validity coefficient for biomarker, T theoretical true intake
  2. aThe maximum limits were set to either −1 or +1