I have a study conducted by a team of doctors: two groups of people were treated for stress urinary incontinence in two ways: TVT and abbrevo. Each group consisted of 23 people. The hypothesis is as follows:neither method is better than the other.
To begin, I want to check the comparability of groups. That is, to check whether these two samples are a random sample from the same population. Which criteria is best to use?
Secondly, how do I formulate a strictly statistical hypothesis test and what method? Initially I inclined to the Mann-Whitney U test, but Wikipedia says that this criteria can not be used when a lot of duplicates.
We have information about
- Age of patient
- Patients are females
- Amount of births and pregnancies
- Mass index
- UDI-6 (before operation)
- IIQ-7 (before operation)
- Pain (yes/no, before operation)
- Diagnosis (stress urinary incontinence, recurrent incontinence, or mixed form)
- Prolapse during op. (yes/no)
- Complications during operation
- Postoperative complications
- Complication (after 6 month)
- Cough test (after 6 month)
- Pain (yes/no)