A case report of the inaccuracy of the questionnaire as a meriod of the patient's condition

Scales for assessment of patients with depression are in use for several decades. Among the most used are Hamilton's depression scale and the younger Patient Health Questionnaire. Even though both are heavily used in research and clinical practice they are still controversial and with questionable usefulness. This case report shows that the question whether a patient is better or worse can be diametrically opposite depending on the scale used (using these two most influential ones as examples) and what are the reasons for this.