METHODS AND TECHNIQUES
Should symptom frequency be factored into scalar measures of alcohol use disorder severity?
Article first published online: 21 JUN 2010
© 2010 The Authors. Journal compilation © 2010 Society for the Study of Addiction
Volume 105, Issue 9, pages 1568–1579, September 2010
How to Cite
Dawson, D. A. and Grant, B. F. (2010), Should symptom frequency be factored into scalar measures of alcohol use disorder severity?. Addiction, 105: 1568–1579. doi: 10.1111/j.1360-0443.2010.02994.x
- Issue published online: 5 AUG 2010
- Article first published online: 21 JUN 2010
- Submitted 15 September 2009; initial review completed 11 December 2009; final version accepted 18 February 2010
- AUD severity;
- symptom frequency;
Aims To evaluate whether weighting counts of alcohol use disorder (AUD) criteria or symptoms by their frequency of occurrence improves their association with correlates of AUD.
Design and participants Data were collected in personal interviews with a representative sample of US adults interviewed in 1991–92. Analyses were conducted among past-year drinkers (12+ drinks, n = 18 352) and individuals with past-year DSM-IV AUD (n = 2770).
Measurements Thirty-one symptom item indicators, whose frequency of occurrence was measured in eight categories, were used to create unweighted and frequency-weighted counts of DSM-IV past-year AUD symptoms and criteria. Correlates included density of familial alcoholism and past-year volume of ethanol intake, frequency of intoxication and utilization of alcohol treatment.
Findings Although the AUD correlates were associated strongly and positively with the frequency of AUD symptom occurrence, weighting for symptom frequency did not strengthen their association consistently with AUD severity scores. Improved performance of the weighted scores was observed primarily among AUD correlates linked closely with the frequency of heavy drinking and among individuals with AUD. Criterion counts were correlated nearly as strongly as symptom counts with the AUD correlates.
Conclusions Frequency weighting may add somewhat to the validity of AUD severity measures, especially those that are intended for use among individuals with AUD, e.g. in clinical settings. For studying the etiology and course of AUD in the general population, an equally effective and less time-consuming alternative to obtaining symptom frequency may be the use of unweighted criterion counts accompanied by independent measures of frequency of heavy drinking.