Table 1

Qualitative variables of the workers and their environment

VariableCategoriesCoding
 Age<25 yearsT1
Between 25 and 40 yearsT2
>40 yearsT3
Body mass index (BMI=weight/height2)From 17.00 to 18.49 (kg/m2)—low weightW0
From 18.50 to 24.99 (kg/m2)—normal weightW1
From 25.00 to 29.99 (kg/m2)—overweightW2
From 30.00 to 34.99 (kg/m2)—chronic overweightW3
From 35.00 to 39.99 (kg/m2)—premorbid obesityW4
Crop area<5 haS1
Between 5 and 10 haS2
>10 haS3
Cultivation systemTraditional mountain olive groveO1
Traditional olive grove with slopes <20%O2
Traditional olive grove without slopesO3
Intensive olive groveO4
Super Intensive olive groveO5
Organic olive grove (Traditional)O6
Height<1.60 mA1
Between 1.60 and 1.70 mA2
>1.70 mA3
Irrigation systemDrylandR0
IrrigationR1
OriginAfricanAfr
SpanishSpa
Eastern EuropeanEurE
Hispanic AmericanHis
SexMaleML
FemaleF
Weight<70 kgP1
Between 70 and 80 kgP2
>80 kgP3