This has been on my mind as well when looking at results.
Just recently I saw two cases with the same highly reviewed doctor. As far as I could tell both patients had a similar starting point with regards to loss, similar age, same ethnicity etc. Patient 1 had a legit 10/10 result, one of the best I've ever seen, yet patient 2's result was subpar, not terrible but not good either - a 4/10. I just don't understand why there could have been such a difference in their respective results.
Possible factors to take into account I guess are:
- Donor calibre/quality
- Use of medication (Finasteride/Minoxidil etc)
- Post-op care (following washing instructions, being careful not to damage grafts)
- Overall health of the patient
- Sheer luck/genetics
Honestly it does seem like the last point plays a big part, which is quite off-putting when looking into a possible surgery.