While 20 PY smokers with age at initiation 20 also had elevated risks of MI (HR 1.82 [1.781.86]), stroke (HR 1.38 [1.361.41]), MI or stroke (HR 1.52 [1.501.54], and all-cause death (HR 1.41 [1.391.42]), they were significantly lower than the risk increase observed in smokers who started before age 20 ( Supplementary Table S1 )
smoking, water pipe tobacco as specified in subheading note 1 to this chapter, whether or not containing tobacco substitutes in any proportion, with less than 0.1% share
"Copenhagen"
For many decades, health regulators have focused on cigarette smoking as their indicator of tobacco and nicotine use
Also wasted, in Cashmans mind, is energy spent on leisure activities
Many claim this will give you a better experiences because of the increased nicotine and fuller flavor