The HUNT4 study: the validity of questionnaire-based diagnoses.

Background: Questionnaire-based headache diagnoses should be validated against diagnoses made by the gold standard, which is personal interview by a headache expert. The diagnostic algorithm with the best diagnostic accuracy should be used when later analysing the data.

Methods: The Nord-Trøndelag Health Study (HUNT4) was performed between 2017 and 2019.

The relationship between obstructive sleep apnea and insomnia: a population-based cross-sectional polysomnographic study.

Background: The relationship between insomnia and objectively measured obstructive sleep apnea (OSA) severity has not previously been investigated in both genders in the general population. The main aim of this population-based polysomnography (PSG) study was to evaluate the cross-sectional association between severity of OSA and DSM-V insomnia and insomnia severity.

Methods: A random sample of 1200 participants in the third Nord-Trøndelag Health Study (HUNT3) was invited and 213 (18%) aged between 21 and 82 years underwent an ambulatory PSG, a semi-structured interview, and a sleep-specific questionnaire.

Insomnia and risk of chronic musculoskeletal complaints: longitudinal data from the HUNT study, Norway.

Background: The aim of this study was to investigate the prospective association between insomnia and risk of chronic musculoskeletal complaints (CMSC) and chronic widespread musculoskeletal complaints (CWMSC). A second aim was to evaluate the association between insomnia and number of body regions with CMSC at follow-up.

Methods: We used data from the second (HUNT2, 1995-1997) and third (HUNT3, 2006-2008) wave of the Nord-Trøndelag Health Study (the HUNT Study).

The epidemiology of headache disorders: a face-to-face interview of participants in HUNT4.

Background: The primary aim of this cross-sectional population-based study was to evaluate the 1-year prevalence of common headache disorders by a face-to-face interview.

Methods: The fourth wave of Nord-Trøndelag Health Survey (HUNT4) started in September 2017. The study was undertaken as part of a project mainly focusing on sleep disorders, where a total of 232 (19.

Headache and insomnia in population-based epidemiological studies.

Background: Several epidemiological studies on the association between primary headaches and insomnia have been published in recent years. Both disorders are frequent, and our purpose was to review results from population-based studies exploring this association.

Methods: We performed a literature search in PubMed for "insomnia" (or sleep disturbance) and "headache" (or migraine) linked with "epidemiology.