Unadjusted outcomes by THC status, n=1540
| Outcomes | Overall, n=1540 | THC positive, n=483 | No substance, n=1057 | P 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.