TABLE 1

Selected Characteristics of Maternal and Infant Participants (2014–2017), N = 54

CharacteristicN = 50 Mothers, No. (%)N = 4 Mothers Who Gave a Repeat Sample, No. (%)
Maternal age, y
 22–257 (14)
 25–3017 (34)
 30–3518 (36)
 35–418 (16)
Maternal ethnicity
 Hispanic9 (18)
 Non-Hispanic41 (82)
Maternal race
 White44 (88)
 African American1 (2)
 Asian American2 (4)
 Native American3 (6)
Maternal education, y
 Partial high school1 (2)
 High school graduate or GED4 (8)
 Some college or specialization27 (54)
 College graduate14 (28)
 Postgraduate4 (8)
Maternal BMI
 <18.50 (0)
 18.5–24.9917 (34)
 25–29.9917 (34)
 >309 (18)
Parity
 121 (42)
 >129 (58)
Route of marijuana exposurea
 Inhalation only32 (64)2 (50)
 Other only7 (14)0 (0)
 Both11 (22)2 (50)
Frequency of marijuana use
 <1 use per d6 (12)1 (25)
 1 use per d23 (46)3 (75)
 >1 use per d21 (42)0 (0)
Full expression of the breastb
 No9 (18)0 (0)
 Yes41 (82)4 (100)
Infant age, moc
 0–33 (6)0 (0)
 3–620 (40)0 (0)
 6–1211 (22)0 (0)
 >1216 (32)4 (100)
Infant sex
 Girl22 (44)
 Boy28 (56)
  • GED, general education diploma; —, not applicable.

  • a Inhalation only was defined as a dose unit of joints, puffs, or grams. Other only was defined as a dose unit of drops, milligrams, or servings. Both was defined as a dose unit from both the inhalation only and the other only groups.

  • b A full expression of milk was defined as emptying the breast of milk entirely during 1 pump session.

  • c If the mother of the infant was breastfeeding >1 child, only data from child 1 were included.