I never really thought about it but I know that its true for me
Possible covariates included maternal age, race/ethnicity, education, marital status, residence, insurance status during pregnancy, adequacy of prenatal care, use of Special Supplement Nutrition Program for Women, Infant and Children (WIC) services, presence of an obstetric risk factor, parity, pregnancy intention, and multivitamin use
Teens also have been found more likely to smoke if they have used an e-cig
Of the 44 analytes assessed, only nicotine, aerosol collected mass 5 (aerosol droplets) and water were found in quantifiable levels
(The Smoking Toolkit Study) Furthermore, a recent study by Action on Smoking and Health (ASH.org) showed that 52% of e-cigarette users (1.5 million) are now considered ex-smokers
Another can contain more nicotine but deliver it gradually over a longer period