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Table 5 Pearson correlation coefficients between 16-day DR and DHQ administered in each season for estimated crude energy and energy-adjusted nutrient intake among 92 women

From: Effect of seasonality on the estimated mean value of nutrients and ranking ability of a self-administered diet history questionnaire

  Women (n = 92)
Fall* Winter* Spring* Summer*
Energy 0.30 0.26 0.19 0.28
Protein 0.45 0.37 0.40 0.28
Fat 0.59 0.62 0.30** 0.36*
Saturated fat 0.70 0.68 0.47** 0.46**
Monounsaturated fat 0.55 0.64 0.26** 0.33*
Polyunsaturated fat 0.35 0.41 0.22 0.29
n-3 Polyunsaturated fat 0.23 0.22 0.24 0.19
n-6 Polyunsaturated fat 0.44 0.50 0.27 0.35
Marine-origin n-3 polyunsaturated fat 0.39 0.43 0.41 0.31
Eicosapentaenoic acid 0.42 0.45 0.47 0.39
Docosahexaenoic acid 0.36 0.40 0.36 0.27
α-Linolenic acid 0.23 0.29 0.22 0.23
Cholesterol 0.35 0.30 0.34 0.33
Carbohydrate 0.62 0.63 0.43* 0.54
Total dietary fiber 0.69 0.66 0.61 0.60
Soluble dietary fiber 0.62 0.55 0.52 0.54
Insoluble dietary fiber 0.70 0.69 0.62 0.59
Alcohol 0.85 0.89 0.79 0.68***
Retinol 0.43 0.40 0.31 0.41
Vitamin A (retinol equivalent) 0.47 0.35 0.34 0.35
α-carotene 0.47 0.31 0.34 0.40
β-Carotene 0.58 0.43 0.55 0.53
β-Carotene equivalent§ 0.58 0.47 0.57 0.54
Cryptoxanthin 0.47 0.56 0.36 0.33
α-Tocopherol 0.39 0.42 0.40 0.29
Vitamin K 0.47 0.42 0.59 0.47
Thiamin 0.31 0.35 0.14 0.02*
Riboflavin 0.50 0.44 0.42 0.27*
Niacin 0.52 0.39 0.39 0.31*
Vitamin B6 0.60 0.58 0.44 0.42*
Vitamin B12 0.46 0.33 0.33 0.26
Folate 0.54 0.49 0.50 0.42
Pantothenic acid 0.57 0.60 0.60 0.51
Vitamin C 0.51 0.55 0.50 0.41
Sodium 0.38 0.35 0.30 0.36
Potassium 0.49 0.51 0.52 0.49
Calcium 0.50 0.56 0.67** 0.54
Magnesium 0.60 0.59 0.51 0.52
Phosphorus 0.44 0.45 0.52 0.45
Iron 0.63 0.50 0.48 0.36**
Zinc 0.50 0.54 0.42 0.35
Copper 0.67 0.66 0.57 0.50*
Manganese 0.47 0.64* 0.59 0.47
  1. Abbreviations: DR = semi-weighed 16-day dietary records; DHQ = self-administered diet history questionnaire.
  2. All variables were log-transformed before analysis.
  3. *The periods in which the DHQs were administered in each season were as follows: Fall = November or December 2002, Winter = February 2003, Spring = May 2003, Summer = August or September 2003.
  4. Sum of eicosapentaenoic acid, docosapentaenoic acid, and docosahexaenoic acid.
  5. Sum of retinol, β-carotene/12, α-carotene/24, and cryptoxanthin/24.
  6. §Sum of β-carotene, α-carotene/2, and cryptoxanthin/2.
  7. Significant difference between correlation coefficients fall and other seasons: *P < 0.05, **P < 0.01, ***P < 0.001(Meng-Rosenthal-Rubin method).