If you do medicals upfront - that means nothing, BUT if you received a request to pass medical exams AFTER you submitted your application - most likely it is approved. The chances of refusing after med request are if there is something wrong in your medical exam, if you hid something in your application, didn't tell the truth, if you made a fraud etc. Other than that it's approved. Medical request is for sure not the first step (as someone mentioned above) - they do a lot of check ups and assessment before the med request.