Özet:

Aim: Vitamin D is effective in calcium absorbtion and bone metabolism.  Also, decreased vitamin D levels are associated with most of the chronic diseases such as DM, HT, cancer and otoimmune diseases. In this study, we aimed to investigate vitamin D levels that is carried out in our laboratory between January and December in 2012. Materials and Methods: A total of 4168 patients between January and December in 2012 were evaluated and age, sex and vitamin D levels classified by month. Results: In our study, 3242 (77,8 %) female and 926 (22,2 %) male were included. Mean vitamin D levels were 22,80±13,27 ng/mL, 22,49±13,88 ng/mL in female patients, 23,75±10,57 ng/mL in male patients. 47 % of patients (50 % in female  38 % in male) have vitamin D levels under < 20 ng/mL (cut-off for vitamin D defiency). Conclusion: Our results showed that there was an important difference between vitamin D levels when patients compared according to sex, age and months. These variations may be important in clinical desicion because vitamin D levels were evaulated according to defiency cut-off and this cut-off is not different for sex and seasons.    

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