Table 2.

Mean plasma cotinine values by time to first cigarette after waking in a community-based study, New York

nPlasma cotinine (ng/mL)P value for pairwise comparison of mean plasma cotinine levels
95% CL6-30 min31-60 min>60 min
Time to first cigarette (min)

NOTE: Mean values are adjusted for cigarettes per day, sex, and race.

Abbreviation: CL, confidence limits.