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The dependent variable was calcification and was dichotomized as negative (to represent the absence of calcification in the pineal gland) and positive (to represent the presence of calcification in the pineal gland). The independent variables were age range and gender. Age was grouped into nine ranges: 10 years or younger, 11–20, 21–30, 31–40, 41–50, 51–60, 61–70, 71–80, and 81 years or older for the incidence analysis and utilized as a continuous variable for the logistic regression analysis.
Copyright and License information: ©2016 Mohammed et al
This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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