Diagnostic Survey of Mental and Substance Use Disorders in HUNT (PsykHUNT)

Study Overview
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Brief Summary
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The aims of this observational survey are to i) gather experience on how to conduct a prevalence study of mental disorders in the Norwegian setting, ii) collect data on the prevalence, risk factors and consequences of mental and substance use disorders, iii) collect data on treatment coverage for mental and substance use disorders, iv) conduct a thorough nonparticipation analysis.

Detailed Description
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The psychiatric survey was a sub-project in the fourth wave of the Trøndelag Health Study (HUNT4), conducted on HUNT4 participants aged 20 to 65 years from the geographical areas Nord-Trøndelag and the city of Trondheim. The targeted sample size was 4,000 participants, and 16,602 persons from the study population of HUNT4 participants were invited to reach this goal. The only exclusion criterion was insufficient understanding of Norwegian or English. The investigators had complete lists with postal addresses and mobile phone numbers for all eligible participants as well as information about date of birth and gender. Potential participants were sampled in repeated probability sampling draws over the course of the data-collection period, which lasted from November 2nd 2018 to September 18th 2020. Younger persons were oversampled to adjust for the expected larger nonparticipation among these age-groups. The predesignated participants were informed about the project through postal letters. A week after receipt of the letter, each received an SMS with information on how to sign up for the psychiatric interview. One SMS reminder was sent to persons who did not respond to the initial invitation. The investigators made four contact attempts to schedule the interview amongst those who registered; three by phone and one final by SMS. All participants received a $30 gift card as a token of appreciation. Computer assisted face-to-face or telephone interviews were conducted by trained and certified interviewers at local field stations. The World Health Organization (WHO) Composite International Diagnostic Interview, fifth version (CIDI 5.0) was used as instrument in the data-collection.

Official Title
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Diagnosebasert undersøkelse Psykiske Lidelser og Ruslidelser

Conditions
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Mental Disorders, Substance Use Disorders, Treatment, Participation

Intervention / Treatment
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* Diagnostic Test: Composite International Diagnostic Interview 5th version (CIDI 5.0)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Sufficient understanding of Norwegian or English to conduct the interview Exclusion Criteria: None

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Diagnostic Test: Composite International Diagnostic Interview 5th version (CIDI 5.0)|Observational study assessing prevalence of mental and substance use disorders in the general population|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Prevalence of mental and substance use disorders in the general population, and by age, gender, educational attainment and urban/rural residency | Mental and substance use disorders assessed in standardised diagnostic interviews employing the Composite International Diagnostic Interview (CIDI 5.0). Diagnostis criteria after ICD-10 and DSM-V. | November 2018 to September 2020 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The characteristics of nonparticipants in a psychiatric diagnostic survey | Compare characteristics of participants versus nonparticipants in the survey in terms of age, gender, educational attainment, mental health symptoms, alcohol use, and use of health services for mental health problems. Data will be retrieved from the HUNT4 study, and official administrative registries and health registries. | November 2018 to September 2020 | 
| The treatment gap for mental and substance use disorders in the general population | Quantify the gap between perceived need for treatment for mental health problems and received adequate treatment using data from CIDI in linkage with data from official health registries. | November 2018 to September 2021 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Mental Disorders, Substance Use Disorders, Treatment, Participation