(1999) noted that if the IRT model cannot account for the dependence between item-pair properly, then the precision of proficiency estimates will be overestimated and showed that accounting for the dependence using, for example, the testlet model would not lead to overestimation of the precision of proficiency estimates.
Patients who fulfil criteria for a present alcohol or cannabis dependence used these substances for a significantly longer time than patients without present dependence (table 4).
Also here if the link trust probabilities are fluctuating, a measure based on relative dependence is used for identifying the stability of clustering.
From the diagnostic interview, the DSM-IV criteria-count for cannabis dependence was used for analysis.
Sample 4 included pedigrees having affected probands with substance dependence, previously used for genome-wide linkage studies [ 18, 19].
The Fagerström Test for Nicotine Dependence (FTND) is used for assessing nicotine dependence.
It measures participants' smoking history, overall health status, drug use history, nicotine dependence (using the Fagerström Test for Nicotine Dependence; Fagerstrom & Schneider, 1989), and post-release smoking intentions and desires.
Participants will also be assessed for tobacco use (including lifetime, current and regular cigarette smoking) and tobacco dependence using the Fagerstrom Test for Nicotine Dependence (FTND) [ 58 ].
Nine clinic visits were scheduled: screening, baseline, Weeks 2, 6, 12, and Months 4, 6, 9 and 12. Demographic data, smoking history and nicotine dependence using the Fagerström Test for Nicotine Dependence (FTND) [ 9] was recorded at baseline.
Additionally, patients will be screened for functional dependence using the Barthel Index of Activities of Daily Living, 47 for depression using the Patient Health Questionnaire (PHQ-8) 48 and for obstructive sleep apnoea using the STOP-Bang criteria.
