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Table 1 Subject characteristics for enrolled subjects (n = 240)

From: Effect of nicotine 6 mg gum on urges to smoke, a randomized clinical trial

 NAverage (min-max)
Sex120 male / 120 female 
Ethnicity235 white, 3 black, 1 Asian
Age (years)35 (19–55)
Numbers of cigarettes smoked /day25 (21–38)
Number of years smoked before study start18 (2–41)