Table 2.

Pearson and Spearman Coefficients for Correlation Between Undocumented and Documented Food Records in Participant Subgroups Receiving Minimal and Comprehensive Instruction, Pathways Study, Northern California, 2006–2009

Daily Nutrient Intake	Minimal Instruction Group (n = 130)							Comprehensive Instruction Group (n = 70)
	Undocumented Mean	Documented Mean	Mean Difference (SE)	Pearson Correlationa	95% CI	Spearman Rank Correlationb	95% CI	Undocumented Mean	Documented Mean	Mean Difference (SE)	Pearson Correlationa	95% CI	Spearman Rank Correlationb	95% CI
Energy, kcal	1,652.9	1,619.2	33.7 (19.7)	0.86	0.80, 0.89	0.83	0.77, 0.87	1,629.1	1,584.6	44.4 (17.1)	0.97	0.96, 0.98	0.94	0.91, 0.96
Alcohol, g	6.7	6.6	0.1 (0.4)	0.93	0.90, 0.95	0.83	0.77, 0.88	3.5	3.5	−0.03 (0.2)	0.99	0.98, 0.99	0.91	0.85, 0.94
% of energy from alcohol	2.7	2.7	−0.01 (0.2)	0.92	0.88, 0.94	0.83	0.77, 0.88	1.3	1.4	−0.1 (0.1)	0.98	0.98, 0.99	0.91	0.86, 0.95
Fat, g	65.3	61.3	4.0 (1.2)	0.77	0.70, 0.83	0.77	0.69, 0.83	67.2	63.6	3.6 (1.2)	0.96	0.93, 0.97	0.94	0.90, 0.96
% of energy from fat	35.1	33.5	1.6 (0.4)	0.79	0.72, 0.85	0.79	0.71, 0.84	35.9	34.8	1.1 (0.3)	0.92	0.88, 0.95	0.92	0.87, 0.95
Carbohydrate, g	195.5	196.0	−0.5 (2.3)	0.91	0.87, 0.93	0.87	0.82, 0.90	193.5	192.1	1.3 (2.1)	0.97	0.95, 0.98	0.96	0.94, 0.97
% of energy from carbohydrate	47.5	48.7	−1.2 (0.4)	0.81	0.74, 0.86	0.83	0.77, 0.87	48.3	49.2	−0.9 (0.4)	0.92	0.87, 0.95	0.91	0.86, 0.95
Protein, g	68.9	69.4	−0.4 (1.0)	0.80	0.73, 0.85	0.79	0.72, 0.85	67.8	66.2	1.5 (1.1)	0.94	0.90, 0.96	0.90	0.84, 0.94
% of energy from protein	17.1	17.6	−0.5 (0.2)	0.77	0.69, 0.83	0.77	0.69, 0.83	17.2	17.4	−0.3 (0.2)	0.90	0.85, 0.94	0.92	0.88, 0.95
Saturated fatty acids, g	21.5	20.0	1.5 (0.6)	0.76	0.68, 0.82	0.76	0.68, 0.82	21.5	20.5	1.0 (0.5)	0.95	0.93, 0.97	0.92	0.88, 0.95
Monounsaturated fatty acids, g	24.9	23.3	1.6 (0.5)	0.75	0.66, 0.97	0.73	0.64, 0.80	24.9	24.3	0.7 (0.5)	0.95	0.91, 0.97	0.92	0.87, 0.95
Polyunsaturated fatty acids, g	13.6	13.0	0.6 (0.3)	0.75	0.66, 0.81	0.74	0.66, 0.81	15.4	13.9	1.6 (0.4)	0.94	0.91, 0.96	0.93	0.89, 0.96
Trans-fatty acids, g	3.4	3.0	0.5 (0.1)	0.72	0.63, 0.79	0.73	0.64, 0.80	2.8	2.2	0.6 (0.1)	0.84	0.76, 0.90	0.83	0.74, 0.89
Fiber, g	19.6	20.4	−0.7 (0.3)	0.91	0.88, 0.94	0.90	0.87, 0.93	20.1	20.6	−0.5 (0.3)	0.96	0.94, 0.97	0.95	0.93, 0.97
Beta-carotene, μg	3,912.3	4,241.9	−329.6 (209.3)	0.79	0.71, 0.84	0.79	0.71, 0.84	3,505.2	3,696.2	−191.0 (122.5)	0.94	0.90, 0.96	0.92	0.88, 0.95
Vitamin D, μg	4.6	4.6	−0.1 (0.1)	0.85	0.79, 0.89	0.84	0.78, 0.88	5.9	5.9	0.04 (0.2)	0.96	0.94, 0.97	0.95	0.91, 0.97
Vitamin C, mg	89.8	96.4	−6.7 (2.7)	0.86	0.81, 0.90	0.84	0.79, 0.89	109.3	115.5	−6.2 (2.7)	0.93	0.89, 0.96	0.94	0.91, 0.96
Vitamin E, mg	12.1	12.9	−0.7 (0.5)	0.78	0.70, 0.83	0.79	0.71, 0.84	12.9	13.1	−0.2 (0.5)	0.90	0.84, 0.94	0.89	0.83, 0.93
Calcium, mg	740.6	740.6	−0.1 (14.2)	0.86	0.81, 0.90	0.85	0.79, 0.89	721.8	721.6	0.3 (11.0)	0.96	0.93, 0.97	0.95	0.93, 0.97
Folate, DFE	500.6	511.3	−10.7 (16.0)	0.74	0.66, 0.81	0.73	0.64, 0.80	453.2	456.5	−3.3 (11.9)	0.89	0.83, 0.93	0.88	0.81, 0.92
Lycopene, μg	3,791.7	3,851.7	−60.0 (279.2)	0.75	0.67, 0.81	0.65	0.55, 0.74	4,223.5	4,428.5	−205.0 (285.4)	0.87	0.80, 0.92	0.94	0.91, 0.97
Glycemic loadc	148.0	147.2	0.8 (2.0)	0.89	0.85, 0.92	0.83	0.77, 0.88	143.1	141.1	2.0 (1.7)	0.96	0.94, 0.98	0.95	0.93, 0.97
Omega-3 fatty acids, gd	0.2	0.2	−0.01 (0.01)	0.81	0.75, 0.86	0.79	0.71, 0.84	0.3	0.2	0.04 (0.02)	0.95	0.92, 0.97	0.96	0.93, 0.97

Abbreviations: CI, confidence interval; DFE, dietary folate equivalents; SE, standard error.

^aPearson correlation coefficients by nutrient were significantly different from the other group using Fisher's z transformation (all P’s < 0.05).

^bSpearman correlation coefficients by nutrient were significantly different from the other group using Fisher's z transformation (all P’s < 0.01 except for total trans-fatty acids (P = 0.066)).

^cGlycemic load (14) was calculated using bread as the reference value.

^dOmega-3 fatty acids consist of docosahexaenoic acid plus eicosapentaenoic acid.