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Adding another measure of relationship to the numerous already known measures of relationship makes
only sense if the new one measure of relationship brings some advantages over the already known one.
A new statistical method, the index of relationship (IOR), is developed which goes far beyond the odds' ratio.
As an example, the study of Loeb et al. (see also Loeb et al. 2017) has been re-analysed.
Evidence from different studies on the relationship between testosterone and prostate cancer has been
inconsistent. Especially an exposure to testosterone and prostate cancer risk is very controversial. However, the
data of the study of Loeb et al. (see also Loeb et al. 2017) support the null-hypothesis:
without sexual activity, no prostate cancer.
Human prostate cancer is a sexually transmitted disease.