Association of Serum 25-Hydroxyvitamin D with Life Style and Dietary Factors in Egyptian Prepubescent Children.
BACKGROUND
There had been a growing evidence of high prevalence of vitamin D deficiency especially among children which may increase the risk of many chronic diseases in adulthood.


OBJECTIVE
Assessment of different lifestyles and dietary behaviour influencing the level of serum 25-OHD in a group of Egyptian prepubescent children.


METHODS
Two hundred boys and girls aged from 9 to 11 years were recruited from two primary public schools situated in Giza governorate in Egypt. A questionnaire was developed to obtain relevant information related to age, dietary habits, and physical activity. Thorough clinical examination and measurement of weight and height were performed. Body mass index was calculated. Serum samples were assayed for 25-hydroxy vitamin D (25-OHD).


RESULTS
Low serum 25-OHD (< 20 ng/ml) was found in 11.5% of the whole sample. Mean serum 25-OHD was significantly lower in obese subjects and in those with low physical activity (p < 0.05). Multiple stepwise linear regression analysis showed that BMI and physical activity were the main predictors of serum 25-OHD (P < 0.05).


CONCLUSIONS
Lifestyle factors in terms of physical activity and BMI may contribute significantly to the optimal vitamin D status of apparently healthy children.
Child Health Department, National Research Centre, Cairo, Egypt.
Mones M Abu
MM
Shady
Child Health Department, National Research Centre, Cairo, Egypt.
Mai M
MM
Youssef
Child Health Department, National Research Centre, Cairo, Egypt.
Manal A
MA
Shehata
Child Health Department, National Research Centre, Cairo, Egypt.
Ebtissam M Salah
EM
El-Din
Medical Biochemistry Department, Medical Division, National Research Centre, Cairo, Egypt.
Heba A
HA
ElMalt
25-hydroxyvitamin D; BMI; children; lifestyle; physical activity