Table 1

Association between smoking prevalence and quit attempts, quit ratio, and cigarette consumption among continuing smokers (±standard error)

Quit attempts (prevalence, %)Quit ratio (%)Consumption (cig/day)
USAEUUSAUSAEU
Prevalence (%), bprev−0.55±0.07***−0.09±0.14−1.13±0.06***0.32±0.02***0.22±0.05***
Centred year, bint−0.16±0.21−0.56±1.94−0.05±0.17−0.15±0.06*0.72±0.99
prevalence×centred year, bslope0.002±0.01−0.04±0.06−0.01±0.010.001±0.003−0.03±0.03
US 1996 dummy−3.13±0.67***−4.03±0.18***
constant, b044.73±1.58***30.46±4.39***74.12±1.28***11.21±0.48***8.66±1.48***
R20.240.260.570.760.33
  • Significance levels: *p<0.05, **p<0.01, ***p<0.001.