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Table 4 Correlation coefficients for the ACAES FFQ1 and ACAES FFQ2 for reproducibility

From: Reproducibility and comparative validity of a food frequency questionnaire for Australian children and adolescents

Energy & Nutrients FFQ1 vs FFQ2 (n = 101)
  Unadjusted (crude) Transformed Energy-adjusted, transformed
Energy (kJ) 0.45 ** 0.44 ** -
Protein (g) 0.50 ** 0.48 ** 0.36 **
Fat (g) 0.49 ** 0.50 ** 0.31 **
Sat Fat (g) 0.48 ** 0.49 ** 0.35 **
Poly Fat (g) 0.44 ** 0.44 ** 0.33 **
Mono Fat (g) 0.50 ** 0.51 ** 0.33 **
Carbohydrate (g) 0.37 ** 0.35 ** 0.20*
Sugars (g) 0.34 ** 0.34 ** 0.31 **
Fibre (g) 0.44 ** 0.40 ** 0.31 **
Thiamin (mg) 0.40 ** 0.37 ** 0.21*
Riboflavin (mg) 0.46 ** 0.43 ** 0.21*
Niacin (mg) 0.52 ** 0.50 ** 0.36 **
Niacin equiv (mg) 0.53 ** 0.51 ** 0.41 **
Vitamin C (mg) 0.45 ** 0.38 ** 0.34 **
Folate (μg) 0.45 ** 0.41 ** 0.28 **
Vitamin A (μg) 0.42 ** 0.37 ** 0.18
Retinol (μg) 0.46 ** 0.36 ** 0.20
Betacarotene (μg) 0.50 ** 0.48 ** 0.45 **
Magnesium (mg) 0.46 ** 0.44 ** 0.49 **
Calcium (mg) 0.46 ** 0.48 ** 0.50 **
Iron (mg) 0.45 ** 0.41 ** 0.29 **
Zinc (mg) 0.49 ** 0.49 ** 0.40 **
Measure of central tendency 0.46 § 0.44 §§ 0.32 §§
  1. Spearmans correlations undertaken in unadjusted (crude) data.
  2. Pearsons correlations undertaken on all other data (square-root transformed).
  3. * denotes p-value < 0.05; ** denotes p-value < 0.01; § denotes median; §§ denotes mean.
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