Gestational age  
   Mean (weeks) 38.4 (SD: 1.5)
   > 36.6 w (n/%) 25 (92.5)
   32-36.6 w (n/%) 2 (7.4)
   28-31.6 w (n/%) 0 (0)
   <27.6 w (n/%) 0 (0)
Birth weigh  
   Mean (g) 2821 (SD: 496)
   Appropriate birth weight (n/%) 18 (66.6)
   Low birth weight (n/%) 9 (33.3)
Size  
   Mean (cm) 47.3 (SD: 2.4)
Head circumference  
   Mean (cm) 33.3 (SD: 1.8)
Apgar 5 min (n/%)  
   <7 1 (3.7)
   >6 23 (85.2)
   Unknown 3 (11.1)
Mother infections (n/%)  
   HIV 15 (55.6)
   HBV 6 (22.2)
   Other 4 (14.8)
Mother consumption (n/%)  
   Heroine 27 (100)
      Inhaled 4 (14.8)
      Injected 11 (40.7)
      Both 3 (11.1)
      Unknown 9 (30)
   Methadone 8 (29.6)
   Cocaine 3 (11.1)
   Cannabis 6 (22.2)
   Benzodiazepine 1 (3.7)
   Alcohol 1 (3.7)
Neonatal abstinence syndrome  
   n/% 14 (51.9)
   Treatment (n/%)  
      Phenobarbital 11 (78.6)
      Opium tincture 2 (14.3)
      Chlorpromazine 1 (7.1)
Persistent neurological symptoms (n/%) 2 (7.4)
Destination at discharge (n/%)  
   Parents 15 (55.6)
   Other relatives 12 (44.4)
   Foster home 0 (0)
   Adopted 0 (0)
   Foster family 0 (0)
Table 2: Perinatal factors (n=27).