The Hordaland Health Study

Study Overview
=================
Brief Summary
-----------------
The Hordaland Health Studies (HHS) were conducted in 1992-93 (The Homocysteine study) and in 1997-99 (HUSK). Both surveys were conducted as a joint project between the University of Bergen, the Norwegian Health Screening Service (SHUS) (now part of the National Institute of Public Health) and the Municipal Health Service in Hordaland. The main focus of the studies is on chronic diseases including cardiovascular disease, cancer, osteoporosis, anxiety and depression. Some projects focus on psychosocial factors, occupational research, musculoskeletal diseases, urinary incontinence and mapping of drug use. The main purpose of the surveys is to gather information so that disease ultimately can be prevented. Approximately 36,000 residents of Hordaland county participated in the studies, ca. 18,000 in 1992-93 and ca. 26,000 in 1997-99. About 7,000 of those who participated in the 1992-93 survey also participated in 1997-99.

Official Title
-----------------
The Hordaland Health Studies (HHS)

Conditions
-----------------
Chronic Disease

Intervention / Treatment
-----------------
* Other: No intervention


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Born in a specific time-period From Hordaland County Community-dwelling people who were able to come to the study site on their own, and able to fill out questionnaires. Exclusion Criteria: Not born within the specific time-period Not from Hordaland County Institutionalized People People who were not able to fill out questionnaires

Ages Eligible for Study
-----------------
Minimum Age: 40 Years
Maximum Age: 74 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| The Homocysteine Study<br>Conducted in 1992-93, ca. 18000 participated. | Other: No intervention<br>* No intervention<br>|
| The Hordaland Health Study (HUSK)<br>Conducted in 1997-99, ca. 26000 participated. | Other: No intervention<br>* No intervention<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Total mortality. | The unique 11-digit personal identification number assigned to all Norwegian residents facilitates linkage between HHS and the Norwegian Population Register, which contains information on vital status (alive, emigrated, or dead). The follow-up period varies from 16 - 23 years, depending on whether first or second measurement is used as baseline. | Participants are followed from baseline (1992-93 or 1997-99) until death or December 31st, 2015. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Mortality or morbidity from chronic diseases (for example cardiovascular disease, cancer). Also, award of disability pension are used as an outcome. | The Cause of Death Registry, Cancer Registry of Norway, CVDNOR and FD-trygd (a national database of Health and social benefits) will be used to get information on outcomes. The last day of follow-up for cardiovascular disease is December 31st, 2014. The last day of follow-up for cancer is December 31st, 2014. The last day of follow-up for Cause of Death is December 31st, 2014. The follow-up period for cardiovascular disease varies from 15 - 22 years, depending on whether first or second measurement is used as baseline. The follow-up period for cancer varies from 15 - 22 years, depending on whether first or second measurement is used as baseline. | Participants are followed from baseline (1992-93 or 1997-99) until time of diagnosis/death from disease or the last day of follow-up. |