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. 2014 Feb 1:135:29-36.
doi: 10.1016/j.drugalcdep.2013.10.010. Epub 2013 Oct 23.

Item response theory analyses of DSM-IV and DSM-5 stimulant use disorder criteria in an American Indian community sample

David A Gilder  1 , Ian R Gizer  2 , Philip Lau  1 , Cindy L Ehlers  3
Affiliations

Item response theory analyses of DSM-IV and DSM-5 stimulant use disorder criteria in an American Indian community sample

David A Gilder et al. Drug Alcohol Depend. .

Abstract

Background: Native Americans experience some of the highest rates of DSM-IV stimulant dependence (SD) of all U.S. ethnic groups. This report compares DSM-IV and DSM-5 stimulant use disorder (SUD) diagnostic criteria in an American Indian community sample.

Methods: Demographic information, stimulant (methamphetamine or cocaine) use, and lifetime DSM-IV and DSM-5 diagnoses were assessed in 858 adult American Indians. Item Response Theory (IRT) analyses were used to assess SUD criteria in both DSM-IV and DSM-5 criteria sets along an underlying latent trait severity continuum and the effect of demographic variables on differential item functioning (DIF) in those criteria.

Results: The overall rate of DSM-IV SD was 33%, of DSM-IV SUD was 38%, and of DSM-5 SUD was 36% with no gender differences. All SUD symptoms in both the DSM-IV and DSM-5 datasets functioned on the moderate portion of the underlying severity continuum. "Craving" discriminated better than any other criterion at its level of severity in indicating the presence or absence of SUD. There was little DIF in groups defined by gender or any other demographic variable in either the DSM-IV or DSM-5 datasets.

Conclusions: These findings indicate that in this American Indian sample, diagnostic criteria for DSM-IV and DSM-5 SUD function similarly in terms of severity and DIF and that the abolition of the DSM-IV distinction between stimulant abuse and dependence in DSM-5 is warranted.

Keywords: American Indians; DSM-5; DSM-IV; Stimulant Use Disorders.

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Conflict of interest statement

CONFLICT OF INTEREST

All authors declare that there are no conflicts of interest.

Figures

Figure 1
Figure 1
Criterion response curves for 11 lifetime DSM-IV SUD criteria. The probability of endorsement of each SUD criterion (Y-axis) is plotted as a function of increasing severity of the underlying SUD latent trait severity (X-axis). Each SUD criterion is labeled with its name and its discrimination (a) and severity (b) parameters. Criterion Response Curves for DSM-IV SUD (n = 353)
Figure 2
Figure 2
Criterion response curves for 11 lifetime DSM-5 SUD criteria. The probability of endorsement of each SUD criterion (Y-axis) is plotted as a function of increasing severity of the underlying SUD latent trait severity (X-axis). Each SUD criterion is labeled with its name and its discrimination (a) and severity (b) parameters. Criterion Response Curves for DSM-5 SUD (n= 353)
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