126 Chapter 6 Table 3. Descriptive demographics at baseline BEAR Mean (SD) (N) Child Age* 25.1 (5.1) (40) Bayley index score 87.6 (14.7) (29) CoSoS 5.8 (2.9) (40) BITSEA problem score 17.51 (7.46) (35) BITSEA competence score 11.37 (3.95) (35) Mother Autism traits (SOV) 36.2 (5.3) (30) Father Autism traits (SOV) 33.9 (7.9) (16) % (N) Child Sex (40) Boys 80.0 Girls 20.0 Nationality (35) Dutch 88.6 Dual 5.7 Other 5.7 Native language (35) Dutch 85.7 Other 14.3 Mother Country of birth (39) Netherlands 71.8 Other 28.3 Level of education (34) Primary/junior vocational 29.4 Secondary vocational 44.1 Higher professional/university 26.4 Father Country of birth (38) Netherlands 63.2 Other 36.7 Level of education (35) Primary/junior vocational 22.9 Secondary vocational 42.8 Higher professional/university 17.2 Not known 17.1 * Age at inclusion in months
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