I have data from one clinical test for 450 patients. Depending upon my objective, I divided data into 7 different categories to compare two groups, in each category (inherited from parents and not inherited). I used Mann Whitney test to compare two independent groups in all of those seven categories. At the end, I have seven P values, findings showing that either there are differences in groups or not, for each category.
7 different categories are based on gender. There is only one clinical test say C1 for which I have scores.
Gender C1 group
Male 20 inherited
Male 40 not inherited
Female 45 inherited
In first category I compared all inherited and not inherited (C1 and group). In 2nd category I compared only inherited and not inherited males. And in 3rd I compared inherited and not inherited females. I have 7 seven different categories like that.
My question is that “Is there any way to validate these findings?” As I made seven different categories, so differences can emerge by chance as well.