Table 1.

Maternal drug use and methadone maintenance histories (n = 65)

	Mean	sd	Range
Age first drug use (years)	15.75	4.36	11-29
Years of regular (>3x/week) drug use (years)	8.81	5.38	1-21
Length of time in treatment (days)	147.17	63.32	17-247
Number of urine toxicologies obtained	18.23	9.29	1-36
Positive urine toxicologies during pregnancy (%)†	23.85	29.66	0-100
Methadone dose (mg) at delivery	76.17	21.09	10-130
Number of gravid days methadone received	154.02	76.17	19-277
Total methadone dose received during gestation (mg)	10,962.17	6,580.96	1,090-28,010

Note:

^†indicates illicit drug use or licit drug misuse