Validation and test-retest of Pain Assessment tools Albanian language. VAS scale consists in identifying the patient, on a 100 cm line, referring to the point that best represents his pain, where 0 means no pain and 100 = worst possible pain.

Validation of Roland Morrison Questionaire in Albanian language which measures the physical disability of athletes and consists of 24 points of functional capacity of the back. The sense of progression is: the more serious the worse is the performance.

Validation of Barthel Index (BI) in Albanian language. It is used to measure performance in the basic activities of daily life. It refers to the patient's independence in all basic daily living activities. The maximum score used is 100 points and indicates independence in all the basic activities of daily life.

Validation o the Oswestry Disability Index in Albanian language is a questionnaire made up of 10 categories: (1) pain intensity, (2) personal care, (3) lifting, (4) walking, (5) sitting, (6) standing, (7) sleeping, (8) sex life, (9) social life, and (10) traveling. Each category consists of 6 items scored from 0 to 5 with the first statement scoring 0 to the last statement scoring 5. A check at the highest levels means the person is in the worst state. If more than one answer is selected, the highest score is considered.