Predictors of Serum 25-Hydroxyvitamin D Concentrations among a Sample of Egyptian Schoolchildren

Table 1

Serum 25(OH)D levels related to presumed risk factors for vitamin D insufficiency.

Variable	25(OH)D	-test
	Mean ± SD
Gender
Male	43.570 ± 14.192	2.426	0.016
Female	38.842 ± 13.336
BMI
Normal	48.205 ± 10.511	9.604	<0.001
Obese	32.406 ± 12.752
Mother education
High	44.428 ± 10.360	2.554	0.011
Low	39.308 ± 15.468
Physical activity
High (≥4 hours/week)	47.138 ± 12.282	4.538	<0.001
Low (<4 hours/week)	38.154 ± 13.814
Fortified milk intake
Once or more/day	44.227 ± 12.542	4.184	0.002
Less than once/day	35.967 ± 14.819

⁢ is significant. BMI: body mass index.