0 = TKA
1 = UKA

0 = Male
1 = Female

1 = Smoker
2 = Ex-smoker
3 = Never smoked

1 = Reed and write
2 = Elementary, intermediary
3 = Secondary, vocational
4 = University

1 = No drinking
2 = Minimal consumption
3 = Usual consumer
4 = Alcoholic

0 = Low PCS
1 = High PCS