Table 1 Characteristics of the study population

Child demographics

Age at first day of measurement (mean (SD))

5.56 (0.75)

5.52 (0.74)

Gender (% boy/male)

150 (54.3%)

111 (56.1%)

Family environment

Siblings (missing n = 6)

No siblings

21 (7.6%)

16 (8.1%)

1 sibling

159 (57.8%)

122 (61.9%)

2 or more siblings

95 (34.5%)

59 (29.9%)

Children with older siblings (missing n = 2)

No older siblings

103 (35.2%)

76 (38.8%)

1 older sibling

118 (40.3%)

90 (45.9%)

2 or more older siblings

51 (17.4%)

30 (15.3%)

Parent-reported child behaviour

Slept home during all days of measurement (missing n = 16)

218 (82.3%)

151 (79.1%)

Child went to childcare before school hours for at least one day during measurement

31 (11.0%)

24 (12.0%)

Child went to afterschool childcare at school for at least one day during measurement

140 (49.8%)

106 (53.5%)

Child went to afterschool childcare outside school for at least one day during measurement

44 (15.7%)

30 (15.2%)

Travel to school (missing n = 8)

Together with parents and/or siblings

269 (98.5%)

192 (98.0%)

Ability to ride a bicycle (missing n = 5)

No, my child cannot cycle

63 (22.8%)

73 (37.2%)

Yes, only with supervision

88 (31.9%)

42 (21.4%)

Yes, without supervision

125 (45.2%)

81 (41.3%)

Member of sports club = yes (missing n = 6)

153 (55.6%)

114 (58.2%)

Child participated in organized sports for at least one day during measurement

86 (30.6%)

68 (34.4%)

Child participated in swimming lessons for at least one day during measurement

139 (49.5%)

94 (47.5%)

Parent allows child to play outside in the neighbourhood with supervision of siblings or peers (missing n = 4)

188 (67.9%)

137 (69.2%)

Parent allows child to play outside independently in the neighbourhood (missing n = 5)

138 (50.0%)

102 (51.5%)

Parent allows child to travel with supervision of siblings or peers to meet family or friends

117 (42.4%)

88 (44.4%)

Parent allows child to travel independently to visit family or friends

77 (27.4%)

58 (29.7%)