The Compulsive Internet Use Scale (CIUS): some psychometric properties.

The present study aimed to develop a short, easily administered, psychometrically sound, and valid instrument to assess the severity of compulsive Internet use. A set of criteria was determined based on the addiction literature. Next, the internal consistency and convergent validity were determined, and the set was tested as a one-factor solution in two representative samples of heavy Internet users (n = 447 and n = 229) and in one large convenience sample of regular Internet users (n = 16,925). In these three studies, respondents were asked about their online behavior and about problems related to Internet use. In the first study, the Online Cognition Scale (OCS) was included to determine concurrent validity. The newly developed Compulsive Internet Use Scale (CIUS) contains 14 items ratable on a 5-point Likert scale. The instrument showed good factorial stability across time and across different samples and subsamples. The internal consistency is high, and high correlations with concurrent and criterion variables demonstrate good validity.

[Summary of the practice guideline 'Problematic alcohol consumption' (second revision) from the Dutch College of General Practitioners]. / Samenvatting van de standaard 'Problematisch alcoholgebruik' (tweede herziening) van het Nederlands Huisartsen Genootschap.

Compared with the former guideline, more attention is paid to the attitude of the general practitioner towards problem drinkers (about 200 problem drinkers in a standard practice of 2350 patients) and the combined use of alcohol and drugs among young people. The five-shot questionnaire has replaced the earlier 'cutdown, annoyed, guilty, eye-opener' (CAGE) test. Laboratory tests are of little value in the diagnosis. The general practitioner is given tools with which to motivate problem drinkers to change their behaviour. Medication is of minor importance.

Comparing the diagnostic accuracy of carbohydrate-deficient transferrin, gamma-glutamyltransferase, and mean cell volume in a general practice population.

In certain populations, the biological alcohol marker carbohydrate-deficient transferrin (CDT) is known to have a high diagnostic accuracy. The aim of this study was to compare the diagnostic accuracy of CDT, gamma-glutamyltransferase (gamma-GT), and mean cell volume (MCV) in a general practice population; more specifically, to ascertain whether CDT is a better tool than gamma-GT and MCV for (early) recognition of excessive alcohol use. To represent the general practice situation as realistically as possible, three different drinking patterns are defined: irregular excessive, regular excessive, and very excessive. From a sample of 524 men from seven general practices, sensitivity, specificity, and predictive values of the three markers for the three drinking patterns were compared, and receiver-operating characteristic analysis was used to compare differences between the markers. The results indicate that drinking patterns do influence the (difference in) diagnostic accuracy. CDT has a higher diagnostic accuracy for all three drinking patterns than gamma-GT and higher predictive values for hazardous [(ir)regular excessive] drinking patterns than MCV. However, receiver-operating characteristic analyses failed to demonstrate a significant difference between these patterns. It is concluded that the performance of all tests is too low to be useful for screening procedures in a general population; however, some tests may be useful for case finding. CDT seems to be the best alcohol marker available, although the difference between CDT and MCV is small.

The specificity of the CDT assay in general practice: the influence of common chronic diseases and medication on the serum CDT concentration.

Early recognition of alcohol problems by general practitioners might be enhanced by the use of better alcohol markers. Several studies have revealed promising results for the carbohydrate-deficient transferrin (CDT) assay in certain populations. The aim of our study was to examine the specificity of the CDT assay in a general practice population. The main research question was whether common chronic diseases and/or the accompanying prescribed drugs have a negative influence on the specificity of the CDT assay. The 524 men who participated were selected from seven general practices and were suffering from one or more of the following diseases: hypertension, asthma/bronchitis, diabetes mellitus, adipositis/lipid metabolism disorder, angina pectoris, depression, and disorders of the digestive tract. None of the studied diseases or of the accompanying prescribed drugs had an influence on the specificity of the CDT assay. The overall specificity in this general practitioner population was 0.92. It can be concluded that the studied diseases do not bear an influence on the serum CDT concentration, and that, therefore, the CDT assay is a highly specific instrument for use in assessing alcohol consumption in general practice patients.

Effectiveness of a drug-free detention treatment program in a Dutch prison.

Several Dutch penitentiaries, which have relatively severe drug-use related problems, experimented with drug-free detention treatment programs (DVA). These programs aim at controlling drug use by offering a therapeutic atmosphere and serve as linkage to detention posttreatment. In a Rotterdam jail (335 cells), ca. 10% were the DVA. Information was gathered from 86 male inmates who volunteered to enter the program, and 42 from other wings. After 1 year the drug-free detention group more actively searched and accepted treatment. No differences were found in drug use, recidivism, or physical, social, and psychological problems.

The Dutch instant lottery: prevalence and correlates of at-risk playing.

After a long and contentious political debate, the instant lottery was introduced in the Netherlands in 1994. One of the conditions for allowing the introduction was that an evaluation study should be conducted with regard to possible negative side effects of the instant lottery in terms of excessive playing or addiction. This article reports on the main results of this evaluation study. In a random sample of 4497 instant lottery players, at-risk players were differentiated from recreative players on the basis of level of involvement in the instant lottery, impaired control and the experienced negative consequences of playing. Of the sample, 4.1% could be classified as an at-risk player. Actual problems resulting from playing in the instant lottery were experienced by 0.7% of the players. At-risk players and recreative players did not only differ substantially in their playing behaviour, but also with regard to their socio-economic background, playing motivation, participation in other games of chance, and involvement in alcohol use and use of marijuana. To summarize, at-risk players were more likely to come from a poor socio-economic background, to play the instant lottery with a negative playing motivation, to be heavily involved in other forms of gambling, to have used marijuana and to drink alcohol excessively.

Enrollment in a drug-free detention program: the prediction of successful behavior change of drug-using inmates.

Factors predicting the behavior change of drug-using detainees were investigated in detainees in two penitentiaries in The Netherlands. Subjects attended either a standard program or a Drug-Free Detention Program (DFDP) and were assessed at the beginning of detention, at release/transfer, and at 2 years after the end of detention. Predictors of postprogram contact with treatment agencies and changes in criminal recidivism, substance abuse, and psychosocial functioning were investigated using regression analysis. Detainees who started drug use early, without previous DFDP detention, and who frequently expressed self-esteem and who had many family problems realized meetings with drug treatment agencies more often. Those with a legal source of income showed decreases in addiction severity and in the number of days in which hard drugs were used. Comparison of the normal program and the DFDP showed that only for the normal wing could changes in substance use and psychosocial functioning be predicted. Results show the value of multiple-outcome criteria in criminal recidivism research and call for more studies investigating change processes.