Table 2

 Characteristics of study participants (n = 2875)

CharacteristicsFemales (n = 1377)Males (n = 1498)
Body mass index at age 5
    Mean (SD)16.0 (1.7)16.1 (1.4)
    n (%) overweight/obese265 (19.2)233 (15.6)
Body mass index at age 14
    Mean (SD)21.1 (4.0)20.2 (3.5)
    n (%) overweight/obese319 (23.2)311 (20.8)
Symptoms of behavioural problems at age 5
    n (%) >90th centile on CBCL74 (5.4)112 (7.5)
Symptoms of behavioural problems at age 14
    n (%) >90th centile on CBCL116 (8.4)162 (10.8)
Tanner’s pubertal stage
    n (%) stage 1–262 (4.5)197 (13.3)
    n (%) stage 3493 (36.0)660 (44.7)
    n (%) stage 4–5814 (59.5)620 (42.0)
Ethnicity
    White1243 (92.5)1349 (92.6)
    Asian46 (3.4)56 (3.8)
    Aboriginal or Pacific Islander55 (4.1)52 (3.6)
Age mother at birth
    n (%) 13–19 years139 (10.1)156 (10.4)
    n (%) 20–34 years1171 (85.0)1252 (83.6)
    n (%) ⩾35 years67 (4.9)90 (6.0)
Maternal education
    n (%) not completing secondary school245 (17.0)228 (15.3)
    n (%) completed secondary school884 (61.4)978 (62.7)
    n (%) higher or further education311 (21.6)293 (21.5)
Paternal education
    n (%) not completing secondary school235 (17.8)245 (17.0)
    n (%) completed secondary school812 (61.3)884 (61.4)
    n (%) higher or further education277 (20.9)311 (21.6)
Family income at 14 year follow up
    n (%) low404 (30.0)444 (30.3)
    n (%) medium399 (29.6)430 (29.4)
    n (%) high546 (40.5)591 (40.3)
Maternal body mass index
    Mean (SD) kg/m222.0 (4.2)22.0 (3.9)
Paternal body mass index
    Mean (SD) kg/m223.8 (3.5)23.8 (3.6)