Mean/Frequency (%)

SD

Range

Age

15.73

0.28

15.25; 16.25

Gender

Female

2365 (51.0)

Male

2269 (49.0)

Parental socioeconomic status

0.29

0.73

−2.91; 2.91

Early childhood education and care

Preschool at 6 years of age

852 (18.4)

Preschool at 6 years of age and early childhood

education started in 3 - 5 years of age

2883 (62.2)

Preschool at 6 years of age and early childhood

education and care started before 3 years of age

899 (19.4)

Starting age at early childhood education and care

3.91

1.49

1; 6

Scientific literacy¹

538.19

88.72

249.75; 793.90

Mathematical literacy¹

518.02

72.69

201.87; 732.42

Reading literacy¹

535.66

83.10

179.26; 749.70

Collaborative problem-solving¹

541.20

86.96

228.68; 810.05