Table 2.

Mean intake of macronutrients using the Remote Food Photography Method (RFPM) compared to the Doubly Labeled Water (DLW) Method

			Lower 95% CL for Mean
	Mean	SD	LCL	UCL
RFPM
Protein (g)	46.50	10.11	43.22	49.78
Carbohydrate (g)	159.29	42.22	145.61	172.98
Fat (g)	42.40	10.83	38.89	45.91
% Calories from Protein	15.84	2.74	14.95	16.72
% Calories from Carbohydrate	53.75	5.70	51.90	55.60
% Calories from Fat	31.65	4.53	30.18	33.12
Energy intake (kcal/d)	1190.5	256.1	1107.5	1273.6
Food Quotient (FQ)	0.88	0.02	0.88	0.89
DLW Method
NH(kg)	11.03	1.90	10.41	11.64
NO(kg)	10.70	1.84	10.10	11.29
NH/NO	1.03	0.01	1.03	1.03
KH (d−1)	−0.12	0.02	−0.13	−0.11
kO (d−1)	−0.17	0.02	−0.17	−0.16
TEE (kcal/d)*	1412.4	220.0	1341.1	1483.7
Lean body mass (kg)	13.8	2.4	13.0	14.5
Body fat (kg)	5.1	1.9	4.5	5.7
Body fat (%)	26.6	5.3	24.9	28.3
Energy Difference (RFPM – DLW Method) (kcal/d)*	−221.9	274.2	−310.7	−133.0

^*p-value < 0.0001; Mean Percent Error = −22.82 ± 29.71; Root Mean Square Error = 243.68

CL= confidence limit

SD= standard deviation

LCL= lower confidence limit

UCL= upper confidence limit

RFPM= Remote Food Photography Method

DLW= Doubly Labeled Water

N_H = isotope dilution space of ²H

N_O = isotope dilution space of ¹⁸O

k_H = fractional turnover rate of ²H

k_O = fractional turnover rate of ¹⁸O

TEE= total energy expenditure