Nevertheless, «travel times greater than 20 minutes [to a healthcare facility] have been associated with increased risk of adverse neonatal outcomes, including mortality.» (medpagetoday.com)
The authors of the study concluded, «The increased risk for adverse neonatal outcomes reported in women using marijuana in pregnancy is likely the result of coexisting use of tobacco and other confounding factors and not attributable to marijuana use itself.» (phillyvoice.com)
The analysis by parity indicated that there were no statistically significant differences in adverse neonatal outcomes for nulliparous women although the numbers are much smaller than the Birthplace in England study. (bmcpregnancychildbirth.biomedcentral.com)