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Prevalence and cut-off point of vitamin D deficiency among secondary students of Arak, Iran in 2010.

Talaei A, Yadegari N, Rafee M, Rezvanfar MR, Moini A - Indian J Endocrinol Metab (2012)

Bottom Line: The level of 25 (OH) D and PTH (parathormone) was measured and also the prevalence of vitamin D deficiency in different intensities was evaluated and compared between girls and boys by the Student t-test.Three local cut-off points including 13, 21, and 33 ng/ml were defined in the Scatter chart.The results showed that the deficiency of vitamin D in girls is much more than that in boys (P = 0.05).

View Article: PubMed Central - PubMed

Affiliation: Departement Endocrinology, Arak Medical Science University, Iran.

ABSTRACT

Introduction: Vitamin D has a basic role in bone growth and metabolism and has been noticed for its important role in many diseases, such as diabetes, depression, hypertension, and cardiovascular disease. Regarding some studies, detection of vitamin D deficiency in different places has important implication for health. This study determined prevalence of vitamin D deficiency in Arak, a centrally located city in Iran.

Materials and methods: Based upon a cross-sectional study in 2010, 420 students 10--16 years old including 220 girls and 200 boys, studied at Arak secondary schools, were selected by a multistage sampling. The level of 25 (OH) D and PTH (parathormone) was measured and also the prevalence of vitamin D deficiency in different intensities was evaluated and compared between girls and boys by the Student t-test. Vitamin D deficiency for the students was categorized into three intensities based on three levels of 25 (OH) D: mild deficiency - 15 ≤ 25 (OH) D < 20 ng/ml, moderate deficiency -- 8 ≤ 25 (OH) < 15 ng/ml, severe deficiency - 25 (OH) <8 ng/ml. The relationship between the 25 (OH) D and PTH was assessed by Scatter chart to define cut-off points for vitamin D deficiency.

Results: Based on 25 (OH) D < 20 ng/ml, 84% of the students had vitamin D deficiency including 60.7% mild, 22.4% moderate, and 0.7% severe. Three local cut-off points including 13, 21, and 33 ng/ml were defined in the Scatter chart. The results showed that the deficiency of vitamin D in girls is much more than that in boys (P = 0.05).

Conclusion: The high prevalence of vitamin D deficiency could be probably a result of different etiologies. We recommended that people should be encouraged to take vitamin D and calcium supplements and also they should have more exposure to the sunlight.

No MeSH data available.


Related in: MedlinePlus

Mean of PTH of different cut-off points for vitamin D deficiency
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Figure 1: Mean of PTH of different cut-off points for vitamin D deficiency

Mentions: There was also a meaningful relation between vitamin D deficiency and sex (P = 0.001). Based on the logistic regression analysis, the girls have 54.4 times more chance than boys for vitamin D deficiency (OR 54.4) (P < 0.001). Totally 84% of the students had vitamin D deficiency [Table 2]. Three cut-off points 33, 21, and 13 ng/ml were defined for mild, moderate, and severe vitamin D deficiency [Figure 1] using the Scatter chart. The prevalence of vitamin D deficiency based on different intensities was evaluated in both genders [Table 3].


Prevalence and cut-off point of vitamin D deficiency among secondary students of Arak, Iran in 2010.

Talaei A, Yadegari N, Rafee M, Rezvanfar MR, Moini A - Indian J Endocrinol Metab (2012)

Mean of PTH of different cut-off points for vitamin D deficiency
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3475905&req=5

Figure 1: Mean of PTH of different cut-off points for vitamin D deficiency
Mentions: There was also a meaningful relation between vitamin D deficiency and sex (P = 0.001). Based on the logistic regression analysis, the girls have 54.4 times more chance than boys for vitamin D deficiency (OR 54.4) (P < 0.001). Totally 84% of the students had vitamin D deficiency [Table 2]. Three cut-off points 33, 21, and 13 ng/ml were defined for mild, moderate, and severe vitamin D deficiency [Figure 1] using the Scatter chart. The prevalence of vitamin D deficiency based on different intensities was evaluated in both genders [Table 3].

Bottom Line: The level of 25 (OH) D and PTH (parathormone) was measured and also the prevalence of vitamin D deficiency in different intensities was evaluated and compared between girls and boys by the Student t-test.Three local cut-off points including 13, 21, and 33 ng/ml were defined in the Scatter chart.The results showed that the deficiency of vitamin D in girls is much more than that in boys (P = 0.05).

View Article: PubMed Central - PubMed

Affiliation: Departement Endocrinology, Arak Medical Science University, Iran.

ABSTRACT

Introduction: Vitamin D has a basic role in bone growth and metabolism and has been noticed for its important role in many diseases, such as diabetes, depression, hypertension, and cardiovascular disease. Regarding some studies, detection of vitamin D deficiency in different places has important implication for health. This study determined prevalence of vitamin D deficiency in Arak, a centrally located city in Iran.

Materials and methods: Based upon a cross-sectional study in 2010, 420 students 10--16 years old including 220 girls and 200 boys, studied at Arak secondary schools, were selected by a multistage sampling. The level of 25 (OH) D and PTH (parathormone) was measured and also the prevalence of vitamin D deficiency in different intensities was evaluated and compared between girls and boys by the Student t-test. Vitamin D deficiency for the students was categorized into three intensities based on three levels of 25 (OH) D: mild deficiency - 15 ≤ 25 (OH) D < 20 ng/ml, moderate deficiency -- 8 ≤ 25 (OH) < 15 ng/ml, severe deficiency - 25 (OH) <8 ng/ml. The relationship between the 25 (OH) D and PTH was assessed by Scatter chart to define cut-off points for vitamin D deficiency.

Results: Based on 25 (OH) D < 20 ng/ml, 84% of the students had vitamin D deficiency including 60.7% mild, 22.4% moderate, and 0.7% severe. Three local cut-off points including 13, 21, and 33 ng/ml were defined in the Scatter chart. The results showed that the deficiency of vitamin D in girls is much more than that in boys (P = 0.05).

Conclusion: The high prevalence of vitamin D deficiency could be probably a result of different etiologies. We recommended that people should be encouraged to take vitamin D and calcium supplements and also they should have more exposure to the sunlight.

No MeSH data available.


Related in: MedlinePlus