Table 4 Associations between weight status and school-related complaints among boys and girls.

Academic failure

Underweight

1.44 (1.17–1.78)*

1.37 (1.11–1.69)

1.13 (0.97–1.33)

1.12 (0.96–1.32)

Overweight/obese

1.39 (1.24–1.56)*

1.38 (1.23–1.55)

1.71 (1.47–1.98)*

1.66 (1.42–1.93)

School work is not interesting

Underweight

0.91 (0.72–1.13)

0.83 (0.66–1.05)

1.19(1.03–1.39)*

1.19 (1.02–1.38)

Overweight/obese

0.99 (0.88–1.12)

0.96 (0.85–1.09)

0.98 (0.83–1.15)

0.92 (0.78–1.09)

Have no friends at school

Underweight

1.49 (0.91–2.44)

1.24 (0.75–2.06)

1.41 (0.96–2.07)

1.36 (0.92–2.00)

Overweight/obese

1.26 (0.94–1.69)

1.20 (0.89–1.62)

2.16 (1.54–3.03)*

1.96 (1.39–2.77)

Parents don’t encourage to do well at school

Underweight

1.76 (1.09–2.84)*

1.55 (0.95–2.52)

1.67 (1.21–2.30)*

1.60 (1.16–2.23)

Overweight/obese

1.34 (1.00–1.80)

1.29 (0.96–1.74)

1.66 (1.20–2.29)*

1.52 (1.09–2.11)

Does not feel good at school

Underweight

1.54 (1.05–2.26)

1.19 (0.80–1.78)

1.40 (1.09–1.81)*

1.37 (1.05–1.80)

Overweight/obese

1.49 (1.20–1.86)*

1.40 (1.12–1.75)

1.64 (1.28–2.12)*

1.47 (1.12–1.92)

Play truant once a month or more often

Underweight

1.07 (0.84–1.36)

0.97 (0.76–1.25)

1.02 (0.87–1.20)

1.00 (0.85–1.18)

Overweight/obese

1.23 (1.08–1.40)*

1.20 (1.06–1.37)

1.00 (0.85–1.18)

0.95 (0.80–1.12)

Being bullied at school

Underweight

1.30 (0.99–1.72)

1.12 (0.84–1.50)

1.02 (0.83–1.26)

1.01 (0.82–1.25)

Overweight/obese

1.29 (1.10–1.51)*

1.23 (1.04–1.44)

1.55 (1.28–1.89)*

1.45 (1.19–1.77)

Bullying other student(s) at school

Underweight

0.93 (0.69–1.26)

0.84 (0.62–1.14)

1.24 (0.97–1.60)

1.23 (0.96–1.59)

Overweight/obese

1.29 (1.11–1.50)*

1.25 (1.07–1.46)

1.22 (0.94–1.59)

1.15 (0.88–1.50)

Don’t expect to have a bright future

Underweight

1.46 (0.92–2.32)

1.03 (0.63–1.69)

1.24 (0.89–1.74)

1.15 (0.81–1.63)

Overweight/obese

1.13 (0.85–1.51)

1.03 (0.77–1.38)

1.59 (1.16–2.18)*

1.38 (0.99–1.92)