Table 2.

Pearson Correlation Coefficients for Reported Energy Intake and Total Energy Expenditure Based on Doubly Labeled Water Measurements, the Energetics Study, Los Angeles, California, 2006–2009^a

	All Subjects (n = 233)		White Subjects (n = 118)		Black Subjects (n = 115)
	r	95% CI	r	95% CI	r	95% CI
DietDay 24-hour recall
First	0.22	0.10, 0.34	0.26	0.08, 0.42	0.20	0.02, 0.37
First through second	0.40	0.28, 0.49	0.31	0.13, 0.46	0.45	0.30, 0.59
First through third	0.41	0.30, 0.51	0.35	0.18, 0.50	0.46	0.30, 0.59
First through fourth	0.41	0.30, 0.51	0.37	0.21, 0.52	0.44	0.28, 0.58
First through fifth	0.45	0.35, 0.55	0.44	0.28, 0.57	0.47	0.31, 0.60
Mean of first through sixth	0.45	0.35, 0.55	0.44	0.28, 0.58	0.47	0.31, 0.60
National Cancer Institute Diet History Questionnaire	0.33	0.21, 0.44	0.34	0.17, 0.49	0.32	0.14, 0.47

Abbreviation: CI, confidence interval.

^aReported energy intakes were from either the DietDay 24-hour Web-based recall or the Diet History Questionnaire; total energy expenditure was based on the doubly labeled water biomarker. Analysis included subjects who completed the study and had evaluable doubly labeled water biomarkers, dietary intake for at least six 24-hour recalls, and an evaluable Diet History Questionnaire.