Table 2.

Mean daily dietary intake and estimated energy expenditure of 363 young girls

	4th Grade		6th Grade
	Mean ± SD	Range	Mean ± SD	Range	RDA
Total Energy, Kcals (MJ)	1730 ± 573 (7.2 ± 2.4)	552 – 2927	1569 ± 493† (6.6 ± 2.1)	623 – 2918	1600–2000
Protein, g	70 ± 26	14 – 132	62 ± 22†	18 – 123	34
Fat, g	60.9 ± 22.8	14 – 114	54 ± 18‡	15 – 100	62–85
Carbohydrate, g	232 ± 79	74 – 460	215 ± 73*	71 – 436	130
Fiber, g	14 ± 6	4 – 38	13 ± 6	4 – 36	23–28
Calcium, mga	1019 ± 458	252 – 2386	933 ± 387	273 – 2022	1300
Potassium, mg	2372 ± 882	580 – 4677	2190 ± 775*	733 – 4393	4500
Iron, mga	16 ± 8	4 – 45	15 ± 8	5 – 50	8
Magnesium, mga	245 ± 88	76 – 484	225 ± 77*	71 – 499	240
Zinc, mga	13 ± 6	3 – 30	12 ± 6*	4 – 34	8
Vitamin D, IUa	284 ± 186	22 – 926	261 ± 173	23 – 953	600
Vitamin C, mga	109 ± 62	11 – 284	107 ± 68	21 – 339	45
BMR, MJ/24 h (Kcals)	4.9 ± 0.5 (1171 ± 120)	3.7 – 6.8	5.4 ± 0.6 (1291 ± 143)	4.2 – 6.9	NA
Avg. Total Steps/d	8930 ± 2429	3799 – 16579	8014 ± 1770†	3603 – 12883	12000 b
PAL	1.6 ± 0.3	1.2 – 2.2	1.5 ± 0.2†	1.2 – 2	NA

^aValue includes supplements

Significant differences between 4th and 6th grade girls:

^*p < .05,

^†p < .01,

^‡p < .001

RDA for carbohydrate = minimum

BMR = 0.085 wt(kg) + 2.033 (for females 3–10 y); BMR = 0.056 wt(kg) + 2.898 (for females 10–18 y)

^bRecommended number of steps per day for females aged 6–12 y

PAL = physical activity level category

NA = guideline not established