Table 2.

Results from the univariable, full model and stepwise procedure with bias-corrected and accelerated-bootstrap confidence interval (BCa) in overweight|obesity

Variables	Univariable Analysis	Full Model without interaction with BCa	Full Model with interaction and BCa	Stepwise Model with BCa
Age	0.89 [0.77;1.02]	0.80** [0.68;0.95]	0.81* [0.70;0.97]	0.81* [0.69;0.98]
Sex
Girls (ref.)
Boys	1.29 [0.89;1.87]	1.53* [1.03;2.29]	1.54* [1.01;2.34]	1.53 [1.00;2.35]
Adolescent SES
Low (ref.)
Medium	0.76 [0.47;1.21]	0.97 [0.58;1.62]	1.78 [0.83;3.91]	1.78 [0.71;3.51]
High	0.59* [0.37;0.93]	0.94 [0.55;1.59]	2.37 [1.00;5.52]	2.38 [0.99;5.54]
School SEC
Low (ref.)
Medium	0.74 [0.49;1.12]	0.58 [0.33;1.01]	1.11 [0.54;2.32]	1.15 [0.56;2.28]
High	0.38*** [0.22;0.64]	0.34** [0.17;0.68]	1.14 [0.31;3.52]	1.24 [0.27;3.29]
School Lunch
Outside of school (ref.)
At school	0.70 [0.47;1.01]	1.08 [0.66;1.76]	1.16 [0.69;1.91]	–
Physical Activity
Low PA (ref.)
Medium PA	0.82 [0.55;1.24]	1.01 [0.65;1.6]	1.03 [0.65;1.65]	1.02 [0.64;1.65]
High PA	0.48* [0.22;0.95]	0.44* [0.19;0.93]	0.42* [0.18;0.95]	0.41* [0.17;0.90]
Household Composition
Live with both parents (ref.)
Do not live with both parents	1.13 [0.77;1.66]	1.01 [0.66;1.52]	1.01 [0.65;1.58]	–
Number of Siblings (M, SD)	1.14* [1.02;1.27]	1.10 [0.97;1.25]	1.12 [0.98;1.28]	1.11 [0.97;1.26]
Adolescent SES x School SEC
Low Adolescent SES x Low School SEC			ref.	ref.
Medium Adolescent SES x Medium School SEC			0.43 [0.15;1.30]	0.43 [0.15;1.36]
High Adolescent SES x Medium School SEC			0.15** [0.05;0.56]	0.16** [0.04;0.50]
Medium Adolescent SES x High-School SEC			0.08* [0.00;0.62]	0.08* [0.00;0.70]
High Adolescent SES x High-School SEC			0.18* [0.04;0.89]	0.18* [0.04;0.82]
Aikake Information Criterion		729	718.52	714.9
Sensitivity		73.6%	79.3%	79.3%
Specificity		50.9%	50.1%	50.9%
Area Under Curve		0.653	0.691	0.690

Note. Outcome variable: overweight or obesity; Ref.: Reference category; *p-value:0.05, **p-value:0.01, ***p-value:0.001