Table 2

Unadjusted outcomes by THC status, n=1540

OutcomesOverall, n=1540THC positive, n=483No substance, n=1057P value*
Gestational age (weeks), mean (SD)38.9 (2.0)38.9 (1.7)38.9 (2.1)0.651
Preterm birth (<37 weeks), n (%)152 (9.9)44 (9.1)108 (10.2)0.651
NICU admission, n (%)189 (12.3)56 (11.6)133 (12.6)0.651
Length (cm), mean (SD)50.1 (3.1)49.5 (2.9)50.3 (3.2)0.003
Weight (kg), mean (SD)3.25 (0.58)3.13 (0.56)3.31 (0.59)0.003
Low birth weight (<2.5 kg), n (%)136 (8.8)59 (12.2)77 (7.3)0.004
Head circumference (cm), mean (SD)34 (2.2)33.6 (2.5)34.2 (2)0.003
5 min Apgar, mean (SD)8.7 (0.7)8.8 (0.7)8.7 (0.7)0.533
  • Marijuana exposed neonates were also more likely to be designated as low birth weight (<2.5 kg).

  • *t-Tests for continuous data; χ2 tests for categorical data; reported p values are corrected for multiple testing using the Benjamini and Hochberg false discovery rate correction

  • NICU, neonatal intensive care unit; THC, tetrahydrocannabinol.