The restriction to oxygenated blood flowing can cause symptoms in the arms and legs, starting with coldness, pain, tingling sensations, and color change
Adults (18 years old or older) who: Have used any tobacco/nicotine product for at least 1 year and have used tobacco in the past month
Currentsmokers had increased risks of all cancers combined (HR = 1.42, 95% confidence interval [CI], 1.341.51), cancers of the lung (HR = 17.66, 95%CI, 14.6521.29), larynx (HR = 11.29, 95%CI, 5.4923.20), headandneck (HR = 2.53, 95%CI, 1.873.41), oesophagus (HR = 3.84, 95%CI, 2.336.35), liver (HR = 4.07, 95%CI, 2.556.51), bladder (HR = 3.08, 95%CI, 2.004.73), pancreas (HR = 2.68, 95%CI, 1.933.71), colorectum (HR = 1.31, 95%CI, 1.091.57) and unknown primary site (HR = 3.26, 95%CI, 2.194.84) versus neversmokers
Ryan and colleagues (2012) discuss these differences in the definitions of current smoking and how they could affect smoking estimates, particularly in some subpopulations
Environmental contaminants Everybody knows that smoking cigarettes and being around active smokers is dangerous to peoples health