Table 2 Bivariate associations of individual factors and neighbourhood SEP, respectively, with overweight

Sex

 Boy

0.98 (0.81-1.19)

0.8429

 Girl

Reference

Nationality of the child

 Other than German

2.05 (1.65-2.54)

<.0001

 German

Reference

Birth weight

 Low (<2.500 gram)

0.92 (0.67-1.25)

0.5808

 Normal (2.500 gram – 4.000 gram)

Reference

 High (>4.000 gram)

1.78 (1.33-2.40)

0.0001

BMI mother

 Normal (<25 kg/m²)

Reference

 Overweight (25 kg/m² - <30 kg/m²)

2.44 (1.93-3.08)

<.0001

 Obese (≥30 kg/m²)

3.08 (2.19-4.34)

<.0001

Parental Education

 Low

2.53 (1.98-3.23)

<.0001

 Middle

1.76 (1.39-2.23)

<.0001

 High

Reference

Parental working status

 Unemployment within household

1.63 (1.17-2.27)

0.0042

 At least one parent employed

Reference

Equivalent household income

 Low (<60 % Median)^a

2.35 (1.69-3.27)

<.0001

 Middle (60 % to Median)

1.79 (1.32-2.43)

0.0002

 High (>Median)

Reference

 Not indicated

1.68 (1.27-2.22)

0.0003

Single parenthood

 Single parent

1.02 (0.77-1.34)

0.9079

 Other

Reference

Household crowding

 Yes

1.55 (1.27-1.88)

<.0001

 No

Reference

Neighbourhood SEP

 High

Reference

 Middle

1.35 (1.03-1.77)

0.0319

 Low

2.00 (1.55-2.56)

<.0001