Monitoring Patients

To be meaningful, must provide evidence through monitoring the group of patients in the study of the available open the doctor and patient alike know that the drug administered.

Schedule a test, and treated and observed in the patients in the near future (prospective study) provide the strongest evidence that the ex-post evaluation of a group of patients in the past (retrospective test) treatment. Studies in the open, and there are a number of factors, the results seem in many cases cheaper than they make in reality. First, there will be biased in favor of improved references, and the results of treatment. Then there is the placebo effect: that the patient gets better, because he wants to heal, and that participation in clinical trials assured. Finally, there is a bias by excluding patients who stop treatment or who deteriorate and then the examiner the impression that the well-established that most of his patients, and data are received at the end of the day, especially on issues of response to treatment.