Table 1.

Demographic characteristics and tobacco exposure of sample population

CharacteristicValue for group
NonsmokersCurrent smokers
Mean age, yr2120
Gender8 males, 7 females12 males, 3 females
Pack yr tobacco use (mean ± SD)a01.46 ± 0.68
Salivary cotinine, ng/ml (mean ± SD)027.3 ± 4.2
  • a Number of packs per day multiplied by number of years of smoking.