Severity: Warning
Message: file_get_contents(https://...@pubfacts.com&api_key=b8daa3ad693db53b1410957c26c9a51b4908&a=1): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
Filename: helpers/my_audit_helper.php
Line Number: 176
Backtrace:
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 176
Function: file_get_contents
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 250
Function: simplexml_load_file_from_url
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3122
Function: getPubMedXML
File: /var/www/html/application/controllers/Detail.php
Line: 575
Function: pubMedSearch_Global
File: /var/www/html/application/controllers/Detail.php
Line: 489
Function: pubMedGetRelatedKeyword
File: /var/www/html/index.php
Line: 316
Function: require_once
Current conceptualizations of nicotine dependence suggest assessing its multidimensional structure, especially for understanding how dependence develops in teen smokers. It is unknown if a multidimensional structure holds for teens with varying levels of smoking. The psychometric properties and predictive validity of the youth-specific, multidimensional Nicotine Dependence Syndrome Scale (NDSS) was assessed among 526 teens (55.5% female; 74.3% Caucasian) who reported smoking in the past 30 days. NDSS and smoking measures were obtained at baseline and six months. Confirmatory factor analysis supported the NDSS-Total (NDSS-T, α=.94) and five factors for the sample: Drive (α=.92), Tolerance (α=.85), Priority (α=.83), Stereotypy (α=.73), and Continuity (α=.64). NDSS-T, Drive, Tolerance, and Priority were predictors of subsequent amount smoked (p<.01). Drive, Tolerance, and Continuity predicted subsequent cessation (p<.05). Though the youth-specific NDSS has good psychometric properties, tests of predictive validity for subsequent smoking and cessation behavior suggest only certain dimensions of dependence, particularly Drive and Tolerance, appear to be salient in this sample. Further studies should assess the multidimensional nature of nicotine dependence among teens with varying levels of smoking.
Download full-text PDF |
Source |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3662047 | PMC |
http://dx.doi.org/10.1016/j.addbeh.2009.03.016 | DOI Listing |
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