11 ms·
I've read that it's notoriously difficult to measure the impact of crack on prenatal development because so many crack-smoking pregnant women also smoke cigaret
by raldi 13y ago
I've read that it's notoriously difficult to measure the impact of crack on prenatal development because so many crack-smoking pregnant women also smoke cigarettes, and the latter is so harmful already that it's hard to isolate the effects of the former.
- clavalle 13y agoThat doesn't make a lot of sense since there are plenty of pregnant tobacco smokers that don't smoke crack.
- raldi 13y agoI'm not following; could you elaborate?
- josephlord 13y agoThe control group should be smokers not non-smokers and if all the cocaine using group are also smokers the difference should be the effect of the cocaine.