Document Detail


Using the time-varying effect model (TVEM) to examine dynamic associations between negative affect and self confidence on smoking urges: differences between successful quitters and relapsers.
MedLine Citation:
PMID:  22246429     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
With technological advances, collection of intensive longitudinal data (ILD), such as ecological momentary assessments, becomes more widespread in prevention science. In ILD studies, researchers are often interested in the effects of time-varying covariates (TVCs) on a time-varying outcome to discover correlates and triggers of target behaviors (e.g., how momentary changes in affect relate to momentary smoking urges). Traditional analytical methods, however, impose important constraints, assuming a constant effect of the TVC on the outcome. In the current paper, we describe a time-varying effect model (TVEM) and its applications to data collected as part of a smoking-cessation study. Differentiating between groups of short-term successful quitters (N = 207) and relapsers (N = 40), we examine the effects of momentary negative affect and abstinence self-efficacy on the intensity of smoking urges in each subgroup in the 2 weeks following a quit attempt. Successful quitters demonstrated a rapid reduction in smoking urges over time, a gradual decoupling of the association between negative affect and smoking urges, and a consistently strong negative effect of self-efficacy on smoking urges. In comparison, relapsers exhibited a high level of smoking urges throughout the post-quit period, a time-varying and, generally, weak effect of self-efficacy on smoking urges, and a gradual reduction in the strength of the association between negative affect and smoking urges. Implications of these findings are discussed. The TVEM is made available to applied prevention researchers through a SAS macro.
Authors:
Mariya P Shiyko; Stephanie T Lanza; Xianming Tan; Runze Li; Saul Shiffman
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Prevention science : the official journal of the Society for Prevention Research     Volume:  13     ISSN:  1573-6695     ISO Abbreviation:  Prev Sci     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-05-16     Completed Date:  2012-09-12     Revised Date:  2013-07-22    
Medline Journal Info:
Nlm Unique ID:  100894724     Medline TA:  Prev Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  288-99     Citation Subset:  IM    
Affiliation:
Department of Counseling & Applied Educational Psychology, Bouve College of Health Sciences, Northeastern University, 404 INV, 360 Huntington Ave, Boston, MA 02115, USA. m.shiyko@neu.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Affect*
Female
Humans
Longitudinal Studies
Male
Models, Psychological*
Motivation*
Multivariate Analysis
Psychometrics
Risk Factors
Self Concept*
Self Efficacy
Smoking / epidemiology*,  psychology
Smoking Cessation / methods,  psychology*
Time Factors
Grant Support
ID/Acronym/Agency:
DA06084/DA/NIDA NIH HHS; P50 DA010075/DA/NIDA NIH HHS; P50 DA010075-14/DA/NIDA NIH HHS; R21 DA024260/DA/NIDA NIH HHS; R21 DA024260/DA/NIDA NIH HHS
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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