> Mortality rates between the drug-positive group or specifically, the cocaine-positive, morphine-positive, or cannabinoid-positive groups were not significantly different from the drug-negative groups (P < .3)
A number of 8.9 to 15.7 deaths per 1k live births doesn't necessarily imply a protective factor, especially when considering all the variable factors and a much smaller sample size compared to the drug negative group.
Also, caffeine isn't mentioned once on there, sure you don't mean cocaine?
> Mortality rates between the drug-positive group or specifically, the cocaine-positive, morphine-positive, or cannabinoid-positive groups were not significantly different from the drug-negative groups (P < .3)
A number of 8.9 to 15.7 deaths per 1k live births doesn't necessarily imply a protective factor, especially when considering all the variable factors and a much smaller sample size compared to the drug negative group.
Also, caffeine isn't mentioned once on there, sure you don't mean cocaine?