The aims of this observational survey are to 1) collect data on the prevalence of mental and substance use disorders, and 2) investigate risk factors and consequences of mental and substance use disorder

This project focuses on mental health, quality of life and alcohol and substance use in students pursuing higher education. The targeted population, all Norwegian college and university students, are in an important and vulnerable period of life transitions. The overall aim of the current project is two-fold: First, the investigators will conduct a clinical assessment of mental disorders by using the newly developed electronic version of the World Health Organization (WHO) Composite International Diagnostic Interview, fifth version (CIDI 5.0), developed for the WHO World Mental Health Surveys. CIDI 5.0 is a standardized interview assessing 30-days,12 months and lifetime prevalence for several mental and substance use disorders according to diagnostic criteria in the Diagnostic and Statistical Manual of Mental Disorders 5th edition (DSM-5) and International Classification of Diseases 10th edition (ICD-10). The overall aim of this will be to obtain accurate prevalence rates of disorders, as well as to validate and compare the briefer instrument used in the Students' Health and Wellbeing Study (SHOT), including the Hopkins Symptom Checklist-25 (HSCL-25). Second, the investigators will examine risk factors based on data from the SHoT, which is one of the world's largest epidemiological studies of student health.

Inclusion Criteria:

• Being a fulltime college or university student
• Norwegian citizenship
• Ages 18-35 years
• Sufficient understanding of Norwegian or English to conduct the interview

Exclusion Criteria:

• None

Sexes Eligible for Study: All

The base study population of the current study stem from the SHoT 2022 study, a large national survey of students enrolled in higher education in Norway. The SHoT 2022 was a comprehensive survey of several domains of mental health and lifestyle factors, distributed electronically through a web-based platform. In short, SHoT 2022 was conducted between February 8 and April 19, 2022, and invited all full-time Norwegian students pursuing higher education. In all, 169,572 students fulfilled the inclusion criteria, of whom 59,544 students completed the online questionnaires, yielding a response rate of 35.1%.

When consenting to participate in the SHOT2022, the students were also asked to indicate if they wished be invited to a follow-up study of mental disorders, of whom 26,311 consented.

Researchers may gain access to participant data by contacting the SHOT publication committee. Approval from the Norwegian Regional Committee for Medical and Health Research Ethics is a pre-requirement. The SHOT dataset is administrated by the Norwegian Institute of Public Health.

August 2023 to September 2030.

Approval from the Norwegian Regional Committee for Medical and Health Research Ethics. The data must be stored in secure servers which require log in and from which no data can be extracted and copied.