Multinomial regression models testing the association between trait and cognitive impulsivity and smoking cessation treatment dropout and relapse at the 3-month, 6-month and 12-month endpoints.

<p>*p&lt;0.05. DDT, Delay Discounting Task; GNG, Go No-Go Task; IGT, Iowa Gambling Task.</p><p>Multinomial regression models testing the association between trait and cognitive impulsivity and smoking cessation treatment dropout and relapse at the 3-month, 6-month and 12-month endpoints.</p

Multinomial regression models testing the association between TCI temperament dimensions and smoking cessation treatment dropout and relapse at the 3-month, 6-month and 12-month endpoints.

<p>*p&lt;0.05.</p><p>Multinomial regression models testing the association between TCI temperament dimensions and smoking cessation treatment dropout and relapse at the 3-month, 6-month and 12-month endpoints.</p

Baseline demographic and variables related to cigarette smoking of the participants classified in each of these categories (dropout versus relapse versus abstinence).

<p>Baseline demographic and variables related to cigarette smoking of the participants classified in each of these categories (dropout versus relapse versus abstinence).</p

Sociodemographic and biometric characteristics of study subjects.

a<p>The excess weight group is composed of participants originally classified as having overweight (n = 16) or obesity (n = 20) according to the International Obesity Task Force criteria;</p>b<p>SES: Socioeconomic status. Quintiles for SES are defined according to data from the Financial Survey for Spanish Families, <a href="http://www.bde.es/webbde/es/estadis/eff/eff.html" target="_blank">http://www.bde.es/webbde/es/estadis/eff/eff.html</a>;</p>c<p>BMI: Body mass index.</p

Correlations of SPSRQ, impulsivity and inhibitory control scores with brain anatomy in normal weight subjects.

a<p>SII L, left secondary somatosensory cortex;</p>b<p>DLPFC L, left dorsolateral prefrontal cortex. Significant peaks are given in MNI coordinates. The corresponding anatomical names were obtained using the aal toolbox for SPM8.</p

Between-group interaction between regional gray matter volume and reward sensitivity.

<p>A. Voxel-wise correlations between regional gray matter volume and reward sensitivity score specifically observed in normal weight subjects. Peak coordinate was located in the left secondary somatosensory cortex (SII, Brodmann area 43) (x, y, z = −60, −7, 11; t = 4.51; pFWE-SVC<0.05). <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0049185#s4" target="_blank">Results</a> are overlaid on coronal (left) and axial (right) sections of a normalized brain, and the numbers correspond to the ‘y’ and ‘z’ coordinates in MNI space, respectively. Color bar represents t value. For demonstration purposes the images are displayed at p<0.001 (uncorrected, k>100). B. Plot of the correlation between gray matter volume at the peak coordinate and the reward sensitivity score. Normal weight group (filled circles, solid line) showed a significant correlation between these two measures (r = −0.750; p<0.005), while in the excess weight group the correlation was not significant (r = 0.284; p>0.05).</p

Demographical and clinical descriptive data.

<p>Demographical and clinical descriptive data.</p