Both cyberbullying and cybervictimization are associated with psychiatric and psychosomatic problems. The most troubled are those who are both cyberbullies and cybervictims. This indicates the need for new strategies for cyberbullying prevention and intervention.

The emotional and behavioural problems of 7- to 15-year-old Finnish children and adolescents (n = 735) were assessed in a community population by a brief screening instrument, the Strengths and Difficulties Questionnaire (SDQ). The parent-, teacher- and self-reports of the SDQ were obtained. The results show that for the total scores, the inter-rater agreement between the pairs of reports was 0.38-0.44. The internal consistency in all three questionnaires was 0.71. Functioning above the 90th percentile of the SDQ total difficulties scores in parent-, teacher- and self-reports was strongly associated with help-seeking variables and problematic behaviour according to parents. The correlation of the parental SDQ total scores and the Child Behaviour Checklist total scores was 0.75 and the correlation of the self-report SDQ total scores with the Youth Self Report total scores was 0.71. The differences in sex, grade and informants of the SDQ total difficulties scores are reported. The study gives further evidence of the usefulness of the SDQ as a promising screening instrument for epidemiological research and clinical purposes.

The descriptive statistics suggest that the distributions of SDQ scores are very similar across the Nordic countries. Further collaborative efforts in establishing norms and evaluating the validity of the SDQ as a screening instrument are encouraged.

The psychometric properties of the self-report version of the Strengths and Difficulties Questionnaire (SDQ) among Finnish 13- to 17-year-old adolescents (n = 1,458) were studied. The results show that the psychometric properties of the Finnish SDQ self-report were adequate. The results of the correlation analysis confirmed the postulated structure of the SDQ self-report. The correlations of the items to their respective subscales ranged from moderate to high (r = 0.47-0.73). The internal consistency was acceptable on three and somewhat lower on two of the five subscales (alpha=0.53-0.71). In addition, the factor analysis sufficiently confirmed the postulated structure of the SDQ for girls and boys, except for the conduct problems scale of boys, which was fused with emotional symptoms and with hyperactivity. The means of the SDQ self-report total difficulties scores were very similar to those in a previous study in Great Britain. The results provide additional confirmation of the usefulness of the SDQ as a screening instrument in epidemiological research and clinical practice.

The aims of this study were to examine the prevalence, co-occurrence, and psychosocial determinants of self-perceived headache, abdominal pain, and sleep problems among adolescents. The adolescents from two cities in Finland (n = 2,215, 90.9% of the target population) attending 7th and 9th grade (age range 13-18 years) participated in the cross-sectional survey inquiring about frequency of headache, abdominal pain, sleep problems, and psychosocial difficulties. The 6-month prevalence of weekly headache was 13%, abdominal pain 6%, and sleep problems 27%. All three symptoms were strongly associated with each other. Of the adolescents suffering from one symptom, 32% reported one co-occurring symptom and 17% two co-occurring symptoms. In the multivariate analysis, female gender, experience of psychological difficulties, emotional symptoms, smoking, victimization, and feeling not cared about by teachers were independently associated with all the individual symptoms, as well as an increasing number of symptoms. Sleep problems were associated with older age and peer and alcohol problems. Abdominal pain was associated with conduct problems, and both headache and abdominal pain were linked with immigration background. An increasing number of symptoms was associated with older age, having a chronic illness, and conduct and alcohol problems. Adolescents' headache, abdominal pain and sleep problems were common and often co-occurred. An increasing frequency of each symptom and number of symptoms were associated with psychosocial factors in a similar way. Screening for psychiatric symptoms, substance use, victimization and difficulties with teachers should be included in the assessment of adolescents who suffer from recurrent headache, abdominal pain or sleep problems.