Table 5.

Linear regression models for birth weight, head circumference, and birth length outcomes predicted by cannabis exposure during pregnancy

	Prolonged use versus previous use of cannabis, but not used during pregnancy
	B	95% CI	p value
Birth weight
Cannabis in pregnancy − adjusted	−369	−517 to −220	<0.001
Birth length
Cannabis in pregnancy − adjusted	2.9	−3.3 to 9.2	0.93
Head circumference
Cannabis in pregnancy − adjusted	−0.6	−1.5 to 0.4	0.25

The propensity score based on maternal characteristics, IPTW approaches used. N = 4,922 for birth weight; N = 4,736 for birth length; N = 4,838 for head circumference. Adjusted for a set of confounders: maternal age, education, parity, alcohol use during pregnancy (never, sometimes, and regular/binge), presence of symptoms of anxiety/depression, tobacco smoking in pregnancy (never, sometimes, and daily), use of illicit drugs, use of prescribed medications during pregnancy (opioids and benzodiazepines), work situation, planned pregnancy, and sex. IPTW, inverse probability of treatment weighting.