Neurodevelopmental outcome at two years of age and predictive value of General Movement Assessment in infants exposed to alcohol and/or drugs during pregnancy: a prospective cohort study

Abstract

Background Exposure to alcohol and/or other addictive drugs in pregnancy is a documented risk factor for neurological impairment. We aimed to assess neurodevelopmental outcome at two years of age in infants exposed to prenatal alcohol and/or other addictive drugs and to examine the predictive value of early motor assessment.

Methods This was a follow-up at two years of age in the prospective cohort study Children Exposed to Alcohol and/ or Drugs in Intrauterine Life (CEADIL). The exposed group comprised 73 infants recruited from primary health care and included in a hospital follow-up programme at St. Olavs Hospital, Trondheim University Hospital, Norway. The control group comprised 93 healthy, unexposed infants recruited from the maternity ward at the same hospital. All children had been assessed by physiotherapists using the General Movement Assessment (GMA) at three months of age. Presence of fidgety movements, movement character and the Motor Optimality Score – Revised (MOS-R) were used. At two years of age, the children were assessed by trained examiners using the Bayley Scales of Infant and Toddler Development – Third Edition (BSID-III), Ages & Stages Questionnaires: Social-Emotional (ASQ:SE) and the Hollingshead Two-Factor Index of Social Position (SES).

Results The cognitive, language and motor composite scores of BSID-III were considerably lower in the exposed group than in the control group. Mean differences adjusted for age and parental SES ranged from −13.3 (95% confidence interval, CI: -18.6 to -8.0) to -17.7 (95% CI: -23.3 to -12.2). Suboptimal fidgety movements and monotonous movement character had high sensitivity (0.94 to 0.74), but low specificity (0.10 to 0.32), while sensitivity and specificity of the MOS-R was around 50 and 60%, respectively.

Conclusions Neurodevelopmental outcome at two years of age was poorer in a group of children exposed to alcohol and/or drugs in pregnancy compared with a control group of healthy, unexposed children. Sensitivity of suboptimal fidgety movements and monotonous movement character at three months of age for later neurodevelopmental outcome was high to acceptable, but the MOS-R had limited sensitivity.