Table 1.

Comparison of observed and HEST-recorded item intakes and sources of measurement error

						Sources of measurement error (%)
Day/food item	Spearman correlation	Mean observed	Mean recorded	Wilcoxon signed ranks test	% agreement	Omissions	Intrusions	PS†	CA‡	PSCA§
Day 1 (n 89)
Fruit
Blueberries	0.33**	0.38	0.41	NS	33	20	17	10	11	9
Apple	0.43**	0.34	0.48	0.01	35	7	23	10	22	3
Banana	0.49**	0.63	0.62	NS	59	11	9	12	7	2
Grape tomatoes	0.53**	0.25	0.22	NS	62	14	10	4	4	6
Vegetables
Carrots	0.65**	0.33	0.34	NS	48	5	16	9	11	11
Corn	0.46**	0.65	0.59	NS	47	16	8	15	10	4
Juices
Orange	0.42**	0.72	0.59	0.01	47	14	7	25	3	4
Apple	0.14**	0.96	0.74	0.001	53	16	2	26	3	–
Grape	0.14**	0.92	0.72	0.001	42	11	3	28	10	6
Day 2 (n 56)
Fruit
Peach	0.56**	0.38	0.30	NS	54	14	2	4	21	5
Grapes	0.14**	0.94	0.82	NS	50	14	–	21	11	4
Apple	0.57**	0.34	0.43	NS	61	7	11	2	14	5
Vegetables
Artichoke hearts	0.10**	0.10	0.12	NS	68	13	16	2	–	1
Leafy salad	0.33**	0.42	0.40	NS	41	21	11	9	9	9
Corn	0.73**	0.62	0.63	NS	55	13	4	21	4	3
Juices
Apple	0.42**	0.87	0.76	0.05	63	7	2	20	7	1
Juice blend	0.31**	0.98	0.87	0.01	66	4	–	28	1	1
Juice blend	0.31**	0.92	0.81	NS	63	9	4	18	5	1
Day 3 (n 26)
Fruit
Banana	0.51**	0.49	0.44	NS	69	15	4	4	8	–
Cantaloupe	0.60**	0.58	0.49	NS	54	12	4	4	19	7
Apple	0.81**	0.13	0.17	NS	92	–	8	–	–	–
Vegetables
Celery	0.28**	0.10	0.09	NS	73	12	12	–	3	–
Leafy salad	0.26**	0.41	0.38	NS	42	27	12	8	11	–
Corn	0.21**	0.57	0.67	NS	39	19	8	15	15	4
Juices
Orange	0.40**	0.63	0.69	NS	46	8	19	15	12	–
Apple	0.21**	0.92	0.87	NS	73	4	4	19	–	–
Pineapple	0.24**	0.91	0.92	NS	50	4	–	23	23	–

HEST, Healthy Eating Self-Monitoring Tool.

Significant correlation:

^*P<0.05,

^**P<0.01,

^***P<0.001 (NS, P>0.05).

^†Error attributable to portion size misestimation.

^‡Error attributable to consumption amount misestimation.

^§Error attributable to both portion size and consumption amount misestimation.