Psychometric properties of the Turkish version of Drug Use Disorders Identification Test–Extended (Turkish DUDIT-E) in substance-dependent adults under probation

Figures & data

Table 1. Socio-demographic characteristics, previous psychiatric treatment status of the study group, and the frequency of substances that were used according to the DUDIT-E drug frequency (D) sub-dimension.

Age (mean ± SD)	28.10 ± 7.81
	n	%
Education
Literate	12	6.1
Elementary school	45	23.0
Secondary school	88	44.9
High school	38	19.4
University	13	6.6
Marital status
Married	48	24.5
Single	141	71.9
Divorced/separated	8	4.0
Having a child	45	22.9
Previous psychiatric treatment	64	32.7
Frequency of substance used	User (%)	Non-user (%)
Cannabis	69.4	30.6
Amphetamines	8.7	91.3
Cocaine	13.8	86.2
Opiates	17.9	82.1
Hallucinogens	6.6	93.4
Thinner and other inhalants	7.7	92.3
GHB and other drugs	1.5	98.5
Pills (sleeping/calming)	20.4	79.6
Pills (pain relievers)	22.4	77.6

Table 2. Items belonging to the factors of DUDIT-E positive (P) subscale, its factor loadings, and corrected item-total correlations.

	Component			Positive
	1	2	Unidimensional	Corrected item-total correlation
12. Life without drugs is boring.	0.762		0.689	0.649
11. Get a feeling that everything will work out.	0.754		0.822	0.791
15. With drugs I feel that I am part of the group.	0.748		0.755	0.721
13. I can control feelings like anxiety, anger, and depression.	0.743		0.731	0.694
14. With drugs I can function socially.	0.737		0.769	0.736
17. I get more out of my life.	0.730		0.727	0.687
16. I get better contact with others.	0.707		0.806	0.774
9. More self-confidence.	0.697		0.856	0.829
8. Love everybody and the whole world.	0.658		0.836	0.806
4. Become strong.	0.644		0.861	0.834
5. Feel “normal.”	0.641		0.844	0.815
10. Feel less pain in my back, neck, head, etc.	0.598		0.772	0.738
6. Become creative (get ideas, do artistic things).	0.578		0.806	0.774
2. Lose tension and become relaxed.	0.876		0.686	0.655
1. Sleep better.	0.815		0.652	0.619
3. Become happy.	0.753		0.834	0.811
7. Become active (clean home, do dishes, wash the car, etc.).	0.590		0.792	0.758
Eigenvalues	10.370	1.146	10.370
% of Variance	61.000	6.744	61.000
Cronbach’s alpha coefficient			0.959
Mean			19.61

Note: Extraction method: PCA. Rotation method: Varimax with Kaiser normalization. p < .001.

Table 3. Items belonging to the factors of DUDIT-E negative (N) sub-dimension, its factor loadings, and corrected item-total correlations.

	Component			Negative
	1	2	Unidimensional	Corrected item-total correlation
2. Over the past year, I have sought medical or hospital care or had medical problems (e.g. memory loss or hepatitis) because of drugs.	0.765		0.685	0.634
3. Over the past year, I have been in quarrels or used violence under the influence of drugs.	0.751		0.656	0.609
6. Get suicide thoughts.	0.726		0.696	0.647
9. Have worse contact with friends.	0.707		0.796	0.752
8. Get headaches or feel nauseous.	0.677		0.709	0.659
4. Over the past year, I have had trouble with the police because of drugs.	0.667		0.595	0.546
10. Have trouble concentrating.	0.665		0.847	0.812
7. Avoid the company of others.	0.624		0.780	0.738
5. Feel anxiety.	0.589		0.733	0.688
11. Feel less like having sex.	0.580		0.721	0.676
1. Over the past year, I have had trouble at work, in school, or at home because of drugs.	0.565		0.686	0.642
14. Health worsens.	0.879		0.798	0.777
16. Destroys family life.	0.870		0.758	0.733
12. Destroys finances.	0.842		0.795	0.774
15. Become inconsiderate.	0.811		0.827	0.807
13. Become passive.	0.707		0.719	0.684
17. See everything as a big chaos.	0.688		0.832	0.806
Eigenvalues	9.465	1.485	9.465
% of Variance	55.677	8.734	55.677
Cronbach’s alpha coefficient			0.949
Mean			17.87

Note: Extraction method: PCA. Rotation method: Varimax with Kaiser normalization.

Table 4. Items belonging to the factors of DUDIT-E treatment (T) sub-dimension, its factor loadings, and corrected item-total correlations.

	Component			Treatment	Treatment^a
	1	2	Unidimensional	Corrected item-total correlation	Corrected item-total correlation
8. Do you think it is important to change your drug use?	0.777		0.693	0.693	0.522
4. Are you ready to work to change your drug use?	0.774		0.636	0.636	0.489
6. Do you believe you can get the right sort of professional help?	0.752		0.741	0.741
7. Do you believe you can be helped by professional treatment for your drug use?	0.721		0.746	0.746
10. Have you already changed your drug use and are looking for methods to help you avoid relapses?	0.637		0.686	0.686
3. Have you been worried about your drug use over the past year?	0.551		0.634	0.634	0.550
2. Do you feel tired of using drugs?	0.529		0.635	0.635	0.542
9. Do you believe it will be difficult to change your drug use?	0.820		0.624	0.624	0.540
1. Do you enjoy taking drugs?		0.785	0.380	0.380	0.322
5. Do you think you need professional help to change your drug use?		0.678	0.743	0.743	0.594
Eigenvalues	4.352	1.337	4.352		3.069
% of Variance	43.520	13.370	43.520		43.84
Cronbach’s alpha coefficient		(Total: 0.854)	0.854		0.784
Mean					4.20

Note: Extraction method: PCA. Rotation method: varimax with Kaiser normalization.

^aItems 6, 7, and 10 were not included.

Table 5. Correlations of DUDIT-E sub-dimensions with DUDIT and API subscales.

	Totaled	Positive	Negative	Treatment
DUDIT	0.434	0.455	0.690	0.380
Characteristics of substance use	0.360	0.337	0.571	0.226
Dependency diagnosis	0.439	0.455	0.609	0.415
The effects of substance use on the user	0.480	0.445	0.712	0.457
Craving	0.453	0.459	0.543	0.296
Motivation to quit using substances	0.251	0.102*	0.361	0.526

Note: *p < .05, others p < .001, DUDIT: drug use disorders identification test; API: addiction profile index.