Relative Validity and Reproducibility of a Quantitative Food Frequency Questionnaire for Adolescents with Type 1 Diabetes: Validity of a Food Frequency Questionnaire

Table 2

Pearson correlation coefficients for the comparison between energy and nutrient intake. These values were estimated by QFFQ and 24hR from type 1 diabetes adolescent patients. Goiânia, Brazil, 2009.

Energy and nutrients	Unadjusted				Energy-adjusted
	Crude	(CI 95%)*	Deattenuated **	(CI 95%)*	Crude	(CI 95%)*	Deattenuated **	(CI 95%)*
Total energy	0.47	(0.26–0.64)	0.48	(0.28–0.64)	—	—	—	—
Carbohydrate	0.44	(0.22–0.61)	0.45	(0.24–0.62)	0.58	(0.40–0.72)	0.60	(0.43–0.73)
Protein	0.36	(0.14–0.55)	0.38	(0.16–0.56)	0.31	(0.08–0.50)	0.32	(0.09–0.52)
Lipid	0.66	(0.50–0.77)	0.67	(0.51–0.78)	0.74	(0.61–0.83)	0.75	(0.63–0.84)
Saturated fat	0.57	(0.39–0.71)	0.59	(0.41–0.72)	0.58	(0.40–0.72)	0.60	(0.42–0.73)
Unsaturated fat	0.68	(0.53–0.79)	0.69	(0.55–0.80)	0.74	(0.61–0.83)	0.75	(0.62–0.84)
Total cholesterol	0.36	(0.13–0.55)	0.37	(0.15–0.56)	0.38	(0.16–0.56)	0.40	(0.19–0.58)
Dietary fibre	0.56	(0.38–0.70)	0.59	(0.41–0.72)	0.56	(0.37–0.70)	0.58	(0.40–0.72)
Vitamin C	0.33	(0.10–0.52)	0.34	(0.12–0.54)	0.42	(0.20–0.60)	0.44	(0.23–0.61)
Calcium	0.61	(0.44–0.74)	0.62	(0.45–0.75)	0.73	(0.60–0.82)	0.75	(0.62–0.84)
Iron	0.47	(0.27–0.64)	0.49	(0.29–0.65)	0.45	(0.24–0.62)	0.47	(0.26–0.63)
Zinc	0.40	(0.18–0.58)	0.42	(0.20–0.59)	0.38	(0.16–0.57)	0.40	(0.18–0.58)

*CI = confidence interval; **intraclass correlation coefficient.