Table 3.

Correlations of BDHD-FFQ with 3DDR methods according to nutrients.

Nutrients (Unit)	Gross		Adjusted for Energy		Adjusted for Gender, Age and BMI
	r	p-Value	r	p-Value	r	p-Value
Energy (Kcal)	0.66	0.001	-	-	0.18	0.001
Protein (g)	0.48	0.001	0.26	0.001	0.19	0.001
Carbohydrate (g)	0.58	0.001	0.38	0.001	0.20	0.001
Fat (g)	0.48	0.001	0.25	0.001	0.18	0.001
Calcium (mg)	0.41	0.001	0.28	0.001	0.11	0.001
Iron (mg)	0.30	0.002	0.23	0.001	0.10	0.003
Sodium (mg)	0.38	0.001	0.34	0.001	0.10	0.002
Potassium (mg)	0.39	0.001	0.49	0.001	0.10	0.002
Phosphate (mg)	0.43	0.001	0.53	0.001	0.12	0.001

Intraclass correlation coefficient p-value < 0.05. Interpretation criteria: good outcome (r ≥ 0.50), acceptable outcome (r = 0.20–0.49), and poor outcome (r < 0.20) [44]. Abbreviations: Kcal = kilocalorie; g = gram; mg = milligram.