# How to handle multi pairs for a given ID - Paired t-test

I'm comparing tattoo vs. non-tattoo in 10 subjects. Some of these subjects have more than 1 set of tattoos. How do I handle this situation?

ID   Tattoo    Non-Tattoo
1      21         22
1      24         25
2      25         20
3      19         22

• Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking.
– Community Bot
Sep 8 at 1:52
• ID Tattoo SR 1 yes 25 1 no 23 2 yes 21 2 no 24 3 yes 25 3 no 20 3 yes 19 3 no 18 4 yes 21 4 no 23 5 yes 26 5 no 26 5 yes 22 5 no 19 Sep 8 at 2:06
• Sorry this is difficult to explain. This data is transposed as I don't know how to attach a file. Sep 8 at 2:07
• You can see ID 3 and 5 both have 2 pairs of data. 2 for tattoo, and 2 for non-tattoo. How do I account for this since it is the same subject. Sep 8 at 2:08
• The data example need a better layout. I have tried an edit, but am not sute it is correct since your intent is unclear. Lines starting with 4 spaces are taken as code! But you also need to make clear what are the measured numbers under the tattoo and ǹon-tattoo` columns, what do they represent. No answer will be possible until you clarify! Sep 8 at 2:38