Descriptive statistics for the Neonatal Intensive Care Unit Network Neurobehavioral Scale summary scores are provided based on data from 1388 1-month-old infants in the Maternal Lifestyle Study (MLS) of prenatal drug exposure and child outcome. The multisite MLS is described, followed by tables with descriptive statistics and percentile for the Neonatal Intensive Care Unit Network Neurobehavioral Scale summary scores. The tables include data for the entire MLS sample as well as tables by drug exposure status, gestational age, poverty status, sex, race and ethnicity, and MLS study site. These tables can be used as quasinorms for comparison with other infants of this age.

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