Table 1

Mean differences (post- minus pre- visit levels) in urinary cotinine, and total NNAL [4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL) plus NNAL-glucuronide (NNAL-Gluc)], and the natural logarithm of total NNAL in non-smoking casino patrons

VariablenMean difference (SD)95% confidence intervalPa
Cotinine (nmol/mg creatinine)180.0440.028–0.061<0.0001
(0.034)
NNAL (pmol/mg creatinine)160.0180.010–0.0250.0002
(0.015)
LnNNAL (pmol/mg creatinine)160.8490.480–1.220.0004
(0.753)
  • a On the basis of two-sided paired t test.