Greetings to all. First of all, I would like to appreciate your funding support. Without your support completing this piece of research would not have been possible.
After analyzing the results, I was able to show that a weak negative correlation exists between serum cotinine and the serum vitamin D (25-OH-D3). So this means that smoking may exert a negative influence on the vitamin D status; but statistically this was not found to be significant, more possibly due to the small sample size that I had (n=10 caucasian women), and the presence of other uncontrolled variations such as age, diet, ethnicity and other factors. A repeated test is recommended with a larger sample size to re-analyze the statistical significance. The end message is that smoking may also play a role in overall vitamin D deficiency among other factors.
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