Predictive factors and psychosocial effects of Internet addictive behaviors in Cypriot adolescents.

BACKGROUND: Internet addictive behaviors are associated with a plethora of psychosocial adversities. The study objectives were to assess the determinants and psychosocial correlates associated with Internet addictive behaviors among adolescents. MATERIALS AND METHODS: A cross-sectional study design was applied among a random sample (n=805) of Cypriot adolescents (mean age: 14.7 years). Self-completed questionnaires, including Internet use characteristics, Young Internet Addiction Test, and Strengths and Difficulties Questionnaire, were utilized. RESULTS: Among the study population, the prevalence rates of borderline addictive Internet use (BIU) and addictive Internet use (AIU) were 18.4% and 2%, respectively. Adolescents with BIU had an increased likelihood of concomitantly presenting with abnormal peer relations (AOR: 5.28; 95% confidence interval, CI: 3.37-23.38), conduct problems (AOR: 4.77; 95% CI: 2.82-8.08), hyperactivity (AOR: 5.58; 95% CI: 2.58-12.10) and emotional symptoms (AOR: 2.85; 95% CI: 1.53-5.32). Adolescent AIU was significantly associated with abnormal conduct (AOR: 22.31; 95% CI: 6.90-72.19), peer problems (AOR: 7.14; 95% CI: 1.36-37.50), emotional symptoms (AOR: 19.06; 95% 6.06-60.61), and hyperactivity (AOR: 9.49, 95% CI: 1.87-48.19). The determinants of BIU and AIU included accessing the Internet for the purposes of retrieving sexual information (AOR: 1.17; 95% CI: 1.17-3.23) and participating in games with monetary awards (AOR: 1.90; 95% CI: 1.15-3.14). CONCLUSIONS: Both BIU and AIU were adversely associated with notable behavioral and social maladjustment among adolescents.

Clinical value of loss of heterozygosity in serum microsatellite DNA of patients with gastrointestinal stromal tumors.

GOALS: To study the role of loss of heterozygosity (LOH) in serum microsatellite DNA of patients with gastrointestinal stromal tumors (GIST). BACKGROUND: In GIST, tumor markers from peripheral blood are missing. STUDY: Seventy-eight patients (59 GIST, 13 leiomyomas, 2 leiomyosarcomas, and 4 schwannomas) underwent resection at our institute between 1985 and 2006. Thirty-three preoperative sera (26 GIST and 7 non-GIST) and 62 postoperative sera (47 GIST and 15 non-GIST) were available and tested for alterations in 12 representative microsatellite loci on chromosomes 22, 17, 13, 9, and 3, using fluorescence-based automated capillary electrophoresis by ABI Prism. Survival was calculated with Kaplan-Meier plots. RESULTS: Seventeen out of 26 GIST patients had a positive preoperative serum LOH score (> or =2 LOH, sensitivity 65.4%), and 6 out of 7 non-GIST patients had a negative score (< or =1 LOH, specificity 85.7%, P=0.030, Fisher exact test). Serum LOH in GIST were strongly correlated with Fletcher risk groups (P=0.016, chi test). All metastasized GIST (7/7) showed > or =2 LOH preoperatively. Postoperative sensitivity and specificity of LOH analysis for prediction of relapse in 47 GIST was 75.0% and 64.1%, respectively. After a median observation time of 51.3 months (95% confidence interval, 39.4-61.4), LOH in serum significantly predicted overall survival (P=0.007, log-rank test). CONCLUSIONS: LOH serum analysis in GIST may play a role as a noninvasive, differential diagnostic, prognostic, and monitoring marker in the clinical routine.

Thy-1 as a potential novel diagnostic marker for gastrointestinal stromal tumors.

PURPOSE: Only few immunohistochemical markers besides c-kit exist for gastrointestinal stromal tumors (GISTs). Thy-1, a cell-surface glycoprotein, is a marker for several types of stem cells and particularly for neuronal precursor cells. The aim of this study was to determine Thy-1 expression in GISTs. MATERIALS AND METHODS: Fifty-seven surgically resected and paraffin-embedded GIST samples were analyzed by immunohistochemistry with peroxidase method for Thy-1 molecule. RESULTS: Thy-1 was detected in the majority of 57 GIST samples (54 out of 57 patients, 95%). All samples were c-kit positive and 90% were CD34 positive. All three Thy-1 negative samples were CD34 positive, had a low proliferative index (Ki-67

Internet gambling is a predictive factor of Internet addictive behavior.

BACKGROUND AND AIMS: Adolescent Internet gambling is associated with concomitant addictive behaviors. This study aimed to assess the prevalence of Internet gambling practices, its impact upon psychosocial development and to evaluate the association between gambling practices and Internet addictive behavior among Cypriot adolescents. METHODS: A cross-sectional study was conducted in a convenience sample (n = 805) of adolescents attending selected public schools (9th and 10th grades) in Cyprus. Anonymous self-completed questionnaires were used including the Internet Addiction Test and the Strengths and Difficulties Questionnaire. RESULTS: Among the study population (n = 805), approximately one third (n = 28; 34.9%) reported Internet gambling. Internet gamblers were twice as likely to utilize Internet café portals (adjusted odds ratio for gender and age, AOR: 2.13; 95% confidence interval, 95% CI: 1.56-2.91) for interactive game-playing (AOR: 6.84; 95% CI: 4.23-11.07), chat-rooms (AOR: 2.57; 95% CI: 1.31-4.85), and retrieval of sexual information (AOR: 1.99; 95% CI: 1.42-2.81). Among Internet gamblers 26.0% (n = 73) reported borderline addictive Internet use and 4.3% (n = 12) addictive behavior. Internet gamblers more often had comprehensive psychosocial and emotional maladjustment (AOR: 4.00; 95% CI: 1.97-8.13), including Abnormal Conduct Problems (AOR: 3.26; 95% CI: 2.00-5.32), Emotional Symptoms (AOR: 1.78; 95% CI: 1.02-3.11), and Peer Problems (AOR: 2.44; 95% CI: 1.08-5.48) scores. The multivariate regression analyses indicated that the single independent predictor associated with Internet addictive behavior was Internet gambling (AOR: 5.66; 95% CI: 1.45-22.15). DISCUSSION: Internet gambling is associated with addictive Internet use, as well as emotional maladjustment and behavioral problems, among Cypriot adolescents. CONCLUSIONS: Longitudinal studies are needed to elucidate whether Internet gambling constitutes a risk factor for the development of Internet addictive behavior among adolescents.