Table 6 Exploratory models of multivariate logistic regression related with poor academic performance (dependent variable)

Internet

Coefficient

OR (CI 95 %)

p

 Female

−0.682

0.51 – 0.43–0.60)

<0.001

 Good relationship with family

−0.567

0.57 – 0.45–0.71)

<0.001

 Binge drinking

0.398

1.49 1.20–1.85)

<0.001

 Cannabis

0.485

1.62 (1.27–2.09)

<0.001

 Smoking

0.820

2.27 (1.78–2.90)

<0.001

  1 day

−0.760

0.47 (0.33–0.66)

<0.001

  2 days

−0.702

0.50 (0.40–0.62)

<0.001

  3 days

−0.833

0.44 (0.36–0.53)

<0.001

  Occasional problems

0.219

1.25 (1.04–1.49)

0.016

  Frequent problems

0.299

1.348 (1.053–1.727)

0.018

 Constant

−0.554

0.58

<0.001

Mobile phones

Coefficient

OR (CI 95 %)

p

 Female

−0.787

0.46 (0.39–0.54)

<0.001

 Good relationship with family

−0.690

0.50 (0.40–0.63)

<0.001

 Binge drinking

0.370

1.45 (1.17–1.79)

0.001

 Cannabis

0.374

1.45 (1.13–1.87)

0.003

 Smoking

0.843

2.32 (1.83–3.00)

<0.001

 After-school activities

  1 day

−0.733

0.48 (0.34–0.67)

<0.001

  2 days

−0.658

0.52 (0.42–0.65)

<0.001

  3 days

−0.876

0.416 (0.34–0.50)

<0.001

  Occasional problems

0.611

1.843 (1.52–2.24)

<0.001

  Frequent problems

0.273

1.314 (0.82–2.10)

0.254

 Constant

−0.359

0.699

0.006

Video games

Coefficient

OR (CI 95 %)

p

 Female

−0.704

0.49 (0.41–0.60)

<0.001

 Good relationship with family

−0.645

0.53 (0.41–0.67)

<0.001

 Binge drinking

0.392

1.48 (1.17–1.87)

0.001

 Cannabis

0.406

1.50 (1.15–1.97)

0.003

 Smoking

0.954

2.60 (2.00–3.37)

<0.001

  1 day

−0.725

0.48 (0.34–0.69)

<0.001

  2 days

−0.678

0.51 (0.40–0.64)

<0.001

  3 days

−0.906

0.40 (0.33–0.50)

<0.001

  Occasional problems

0.042

1.04 (0.85–1.28)

0.692

  Frequent problems

0.483

1.62 (1.18–2.23)

0.003

 Constant

−0.413

0.66

0.009