Table 2.

Results of the multiple logistic regression analysis on the association of independent variables on adolescents' "Extra-curricular physical activity"

Model I
Dependent variable: "extra-curricular physical activity"
Independent variables	OR (95% CI)
Sex
Males (reference group)	1
Females	1.27 (1.04 – 1.56)*
Father's educational level
Primary school	0.54 (0.37 – 0.80)**
Junior high school (reference group)	1
High school	1.26 (1.01 – 1.59)*
Degree	1.93 (1.36 – 2.72)**
Father's physical activity
No (reference group)	1
Yes	1.58 (1.25 – 2.00)**
Mother's physical activity
No (reference group)	1
Yes	1.31(1.03 – 1.66)*
Physical activity is important in socialising
No (reference group)	1
Yes	2.46 (1.90 – 3.19)**
Father's work activity
Non skilled worker (reference group)	1
Unemployed	0.36 (0.17 – 0.80)*
Manager/Professional	1.29 (1.01 – 1.67)*
Office worker/Skilled worker	1.11 (0.87 – 1.40)
Model II
Dependent variable: "extra-curricular physical activity"
Independent variables	OR (95%CI)
Sex
Males (reference group)	1
Females	1.27 (1.04 – 1.55)*
Father's educational level
Primary school	0.51 (0.35 – 0.73)**
Junior high school (reference group)	1
High school	1.17 (0.92 – 1.47)
Degree	1.44 (1.04 – 1.99)*
Father's physical activity
No (reference group)	1
Yes	1.58 (1.25 – 2.01)**
Mother's physical activity
No (reference group)	1
Yes	1.32 (1.07 – 1.68)*
Physical activity is important in socialising
No (reference group)	1
Yes	2.34 (1.80 – 3.07)**
Familial socio-economic index
Low and Middle-low (reference group)	1
Middle	1.23 (0.97 – 1.55)
High	1.63 (1.19 – 2.25)**
Very high	1.96 (1.43 – 2.69)**

* p < 0.05; ** p < 0.01