Table 3

Correlation matrix for measures of smoking habit (cigarettes/day (W1,W2)=cigarettes/day at Waves 1,2; Δ cigarettes/day=difference in cigarettes/day (W1−W2); addiction measures at Wave 1 (Fagerstom Test of Nicotine Dependence (FTND18), Autonomy Over Smoking Scale (AUTOS17), Glover–Nilsson Smoking Behavior Questionnaire (GNSBQ19), and measures of demand derived from the cigarette purchase task at Wave 1 (Qo, Omax, Pmax, BP, α, local elasticity)

Cigarettes/day W1Cigerettes/day W2Δ Cigarettes/dayFTNDAUTOSGNSBQQoQmaxPmaxBPα
Cigerettes/day W20.71***
(n=200)
Δ Cigerettes/day0.33***−0.42***
(n=199)(n=200)
FTND0.68***0.58***0.11
(n=323)(n=224)(n=200)
AUTOS0.46***0.39***0.060.55***
(n=322)(n=223)(n=199)(n=356)
GNSBQ0.43***0.40***−0.010.52***0.76***
(n=323)(n=224)(n=200)(n=357)(n=356)
Qo0.68***0.52***0.22**0.45**0.37***0.37***
(n=323)(n=222)(n=200)(n=354)(n=353)(n=354)
Omax0.55***0.40***0.24**0.35***0.26***0.18**0.36***
(n=323)(n=224)(n=200)(n=357)(n=356)(n=357)(n=354)
Pmax−0.010.040.030.00−0.02−0.05−0.080.61***
(n=323)(n=224)(n=200)(n=357)(n=356)(n=357)(n=354)(n=357)
BP−0.010.08−0.07−0.020.060.08−0.030.18**0.28***
(n=284)(n=201)(n=180)(n=315)(n=314)(n=315)(n=312)(n=315)(n=315)
α−0.52***−0.39***−0.17*−0.36***−0.37***−0.32***−0.49***−0.51***−0.39***−0.25***
(n=323)(n=224)(n=200)(n=357)(n=356)(n=357)(n=354)(n=357)(n=357)(n=315)
Local elasticity−0.22***−0.01−0.22**−0.19***−0.14**−0.14**−0.23***0.10*0.26***0.23***0.02
(n=323)(n=222)(n=200)(n=354)(n=353)(n=354)(n=354)(n=354)(n=354)(n=312)(n=354)
• *p<0.05, **p<0.01, ***p<0.001.