Latent Structure of the CPT among Treatment-seeking Smokers with Depression and its Predictive Valid
Thursday, November 15, 2018
Posted by: Natalia Gromov
Alba González-Roz, Roberto Secades-Villa, Sara Weidberg, Ángel García-Pérez, Derek D Reed.
Latent Structure of the CPT among Treatment-seeking Smokers with Depression and its Predictive Validity on Smoking Abstinence.
Nicotine & Tobacco Research, nty236, https://doi.org/10.1093/ntr/nty236
Research has recently shown that nicotine reinforcement is better characterized by a bi-factorial latent structure: Persistence (insensitivity to cigarette pricing) and Amplitude (consumption at inexpensive prices). No study to date has examined its value as a predictor of abstinence. This study aimed to provide new evidence on the CPT´s latent structure in smokers with depressive symptoms, and to examine whether the latent structure performs better as a predictor of continuous abstinence than do the individual indices. Participants [n = 205 smokers; 72% female: BDI-II M = 24.68, SD = 10.45] were randomized to two smoking cessation treatments for quitting smoking [Cognitive Behavioral Treatment (CBT) or CBT + Contingency Management (CM)]. A Principal Component Analysis (PCA) was conducted to examine the latent structure of the CPT and a set of regression models were performed to assess its predictive validity. The PCA revealed a bi-factorial solution which was interpreted as Persistence (breakpoint, Omax, Pmax, elasticity) and Psychological inertia (intensity and elasticity of demand). Evidence on the convergent validity was obtained through significant associations between the two latent factors and smoking variables (all r values ≥.17). Psychological inertia was negatively related to the number of days of continuous abstinence at the end of treatment regardless of the treatment condition [R2 = .038; F(2, 202) = 4.989, p = .008]. Psychological inertia informs on which patients benefit less from smoking cessation treatments incorporating CM and CBT. Treatment components that impact individuals´ excessive valuation of cigarettes might improve cessation outcomes.
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