0 = no
1 = yes

0 = CLBP non seeker
1 = CLBP seeker
2 = Asymptomatic

0 = Male
1 = Female

0 = Stable couple
1 = Single
2 = Married
3 = Divorced
4 = widower

1 = Primary studies
2 = secondary studies
3 = university studies

0 = NO
1 = YES

0 = none
1 = ibuprofen
2 = paracetamol

0 = mild
1 = Moderate
2 = Vigorous