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Author Asberg, A.; Borch-Iohnsen, B.; Mikkelsen, G.; Thorstensen, K.; Asberg, A.E. url  doi
  Title Lower hemoglobin with lower ferritin – results from the HUNT 2 Study Type Journal Article
  Year 2015 Publication Scandinavian Journal of Clinical and Laboratory Investigation Abbreviated Journal Scand J Clin Lab Invest  
  Volume Issue Pages 1-4  
  Keywords Ferritin; hypochromic anemia; iron deficiency anemia; reference values; women health; HUNT2  
  Abstract Aim. We wanted to study the association between blood hemoglobin concentration (b-hemoglobin) and serum ferritin concentration (s-ferritin) in a healthy female population, and compare the findings to those in a previous study of ambulant female patients. Methods. We compared median b-hemoglobin and the fraction with anemia in groups of women with s-ferritin from less than 10 mug/L to 100 mug/L. These women, aged 20-55 years, were part of a health screening survey (HUNT 2) where they reported to have 'good' or 'very good' general health and were found to have normal s-creatinine. The s-ferritin values were adjusted to the level of the previous study. The 10, 50 and 90 percentiles of b-hemoglobin were modelled as functions of s-ferritin using quantile regression. Results. Among 2122 healthy females the entire b-hemoglobin distribution was shifted downwards in women with s-ferritin less than 20 mug/L. Accordingly, the median b-hemoglobin was statistically significantly lower. In women with s-ferritin less than 20 mug/L the fraction with anemia was 0.15. Conclusions. Lower s-ferritin is associated with lower b-hemoglobin in many more subjects than those labelled anemic.  
  Address Department of Clinical Chemistry, Trondheim University Hospital , Trondheim , Norway  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0036-5513 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:25594798 Approved no  
  Call Number HUNT @ maria.stuifbergen @ Serial 1662  
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Author Asvold, B.O.; Bjoro, T.; Platou, C.; Vatten, L.J. url  doi
  Title Thyroid function and the risk of coronary heart disease: 12-year follow-up of the HUNT study in Norway Type Journal Article
  Year 2012 Publication Clinical Endocrinology Abbreviated Journal Clin Endocrinol (Oxf)  
  Volume 77 Issue 6 Pages 911-917  
  Keywords Aged; Coronary Disease/blood/etiology/*mortality; Female; Heart Failure/blood/epidemiology; Hospitalization; Humans; Hypothyroidism/blood/complications; Male; Middle Aged; Myocardial Infarction/blood/epidemiology; Norway/epidemiology; Reference Values; Risk Factors; Thyrotropin/*blood; Thyroxine/blood; Triiodothyronine/blood  
  Abstract OBJECTIVE: In a mortality follow-up of the HUNT Study, serum TSH within the reference range was positively associated with the risk of coronary death in women. We now aimed to confirm the association of high serum TSH with the risk of coronary heart disease, using hospital-based diagnoses of myocardial infarction. DESIGN: Prospective population-based study with linkage to hospital information on myocardial infarction and to the national Cause of Death Registry. PARTICIPANTS: A total of 26, 707 people without previously known thyroid or cardiovascular disease or diabetes at baseline. MEASUREMENTS: Hazard ratios (HR) of coronary death and HRs of hospitalization with a first-time acute myocardial infarction, by baseline thyroid function. RESULTS: During 12, years of follow-up, 960 (3.6%) participants had been hospitalized with first-time myocardial infarction and 558 (2.1%) had died from coronary heart disease. High TSH within the reference range was associated with increased risk of coronary death in women (P(trend) 0.005), but not in men. The risk of coronary death was also increased among women with subclinical hypothyroidism or subclinical hyperthyroidism, compared to women with TSH of 0.50-1.4 mU/l. However, thyroid function was not associated with the risk of being hospitalized with myocardial infarction. CONCLUSIONS: High serum TSH was associated with increased mortality from coronary heart disease in women, but we found no association of thyroid function with the risk of being hospitalized with myocardial infarction. Thus, the morbidity finding does not confirm the suggestion that low thyroid function within the clinically normal range is associated with increased risk of coronary heart disease.  
  Address Department of Public Health, Norwegian University of Science and Technology, Trondheim, Norway. bjorn.o.asvold@ntnu.no  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0300-0664 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:22724581 Approved no  
  Call Number HUNT @ maria.stuifbergen @ Serial 1506  
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Author Asvold, B.O.; Vatten, L.J.; Midthjell, K.; Bjoro, T. url  doi
  Title Serum TSH within the reference range as a predictor of future hypothyroidism and hyperthyroidism: 11-year follow-up of the HUNT Study in Norway Type Journal Article
  Year 2012 Publication The Journal of Clinical Endocrinology and Metabolism Abbreviated Journal J Clin Endocrinol Metab  
  Volume 97 Issue 1 Pages 93-99  
  Keywords Asymptomatic Diseases; Cohort Studies; Diagnostic Techniques, Endocrine/*standards; Female; Follow-Up Studies; Humans; Hyperthyroidism/blood/*diagnosis/etiology; Hypothyroidism/blood/*diagnosis/etiology; Male; Middle Aged; Norway; Prognosis; Reference Values; Risk Factors; Thyrotropin/*blood; Time Factors  
  Abstract CONTEXT: Serum TSH in the upper part of the reference range may sometimes be a response to autoimmune thyroiditis in early stage and may therefore predict future hypothyroidism. Conversely, relatively low serum TSH could predict future hyperthyroidism. OBJECTIVE: The objective of the study was to assess TSH within the reference range and subsequent risk of hypothyroidism and hyperthyroidism. DESIGN AND SETTING: This was a prospective population-based study with linkage to the Norwegian Prescription Database. SUBJECTS: A total of 10,083 women and 5,023 men without previous thyroid disease who had a baseline TSH of 0.20-4.5 mU/liter and who participated at a follow-up examination 11 yr later. MAIN OUTCOME MEASURES: Predicted probabilities of developing hypothyroidism or hyperthyroidism during follow-up, by categories of baseline TSH, were estimated. RESULTS: During 11 yr of follow-up, 3.5% of women and 1.3% of men developed hypothyroidism, and 1.1% of women and 0.6% of men developed hyperthyroidism. In both sexes, the baseline TSH was positively associated with the risk of subsequent hypothyroidism. The risk increased gradually from TSH of 0.50-1.4 mU/liter [women, 1.1%, 95% confidence interval (CI) 0.8-1.4; men, 0.3%, 95% CI 0.1-0.6] to a TSH of 4.0-4.5 mU/liter (women, 31.5%, 95% CI 24.6-39.3; men, 14.7%, 95% CI 7.7-26.2). The risk of hyperthyroidism was higher in women with a baseline TSH of 0.20-0.49 mU/liter (3.9%, 95% CI 1.8-8.4) than in women with a TSH of 0.50-0.99 mU/liter (1.4%, 95% CI 0.9-2.1) or higher ( approximately 1.0%). CONCLUSION: TSH within the reference range is positively and strongly associated with the risk of future hypothyroidism. TSH at the lower limit of the reference range may be associated with an increased risk of hyperthyroidism.  
  Address Department of Public Health, Faculty of Medicine, Norwegian University of Science and Technology, Postboks 8905 MTFS, N-7491 Trondheim, Norway. bjorn.o.asvold@ntnu.no  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0021-972X ISBN Medium  
  Area Expedition Conference  
  Notes PMID:22049180 Approved no  
  Call Number HUNT @ maria.stuifbergen @ Serial 1507  
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Author Bye, A.; Vettukattil, R.; Aspenes, S.T.; Giskeodegard, G.F.; Gribbestad, I.S.; Wisloff, U.; Bathen, T.F. url  doi
  Title Serum levels of choline-containing compounds are associated with aerobic fitness level: the HUNT-study Type Journal Article
  Year 2012 Publication PloS one Abbreviated Journal PLoS One  
  Volume 7 Issue 7 Pages e42330  
  Keywords Choline/*blood; *Exercise; Female; Humans; Male; Oxygen Consumption; Reference Values  
  Abstract BACKGROUND: Cardiovascular disease (CVD) is a leading cause of death worldwide, and the number of people at risk is continuously growing. New methods for early risk prediction are therefore needed to actuate prevention strategies before the individuals are diagnosed with CVD. Several studies report that aerobic fitness level, measured as maximal oxygen uptake (VO(2max)), is the single best predictor of future CVD mortality in healthy people. Based on this, we wanted to study differences between healthy individuals with a large difference in VO(2max)-level to identify new biomarkers of low aerobic fitness that may also have potential as early biomarkers of CVD risk. METHODOLOGY/PRINCIPAL FINDINGS: Serum samples from 218 healthy individuals with a low VO(2max) (n = 108, 63 women) or high VO(2max) (n = 110, 64 women) were analysed with MR metabolomics. In addition, standard clinical-chemical analyses for glucose, lipids, liver enzymes, micro-CRP, and colorimetric analysis on circulating choline were performed. Individuals in the low VO(2max)-group had increased serum levels of free choline, decreased phosphatidylcholine, increased glucose and decreased unsaturated fatty acids compared to the individuals in the high VO(2max)-group. CONCLUSIONS/SIGNIFICANCE: Aerobic fitness dependent differences in serum levels of free choline and phosphatidylcholine are observed. They should be further studied as potential early markers of CVD risk.  
  Address Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1932-6203 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:22860113; PMC3408491 Approved no  
  Call Number HUNT @ maria.stuifbergen @ Serial 1510  
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Author Mai, X.-M.; Langhammer, A.; Chen, Y.; Camargo, C.A.J. url  doi
  Title Cod liver oil intake and incidence of asthma in Norwegian adults--the HUNT study Type Journal Article
  Year 2013 Publication Thorax Abbreviated Journal Thorax  
  Volume 68 Issue 1 Pages 25-30  
  Keywords Adult; Age Distribution; Asthma/*epidemiology/*etiology/physiopathology; Cod Liver Oil/administration & dosage/*adverse effects; Cross-Sectional Studies; Dietary Supplements/*adverse effects; Dose-Response Relationship, Drug; Drug Administration Schedule; Female; Humans; Incidence; Logistic Models; Male; Multivariate Analysis; Norway/epidemiology; Odds Ratio; Questionnaires; Reference Values; Risk Assessment; Sex Distribution; Vitamin A/administration & dosage/*adverse effects; Young Adult  
  Abstract BACKGROUND: Cod liver oil is an important source of vitamin D, but also contains other fat-soluble components such as vitamin A. Before 1999, the cod liver oil formula in Norway contained a high concentration of vitamin A (1000 microg per 5 ml). High vitamin A status is associated with increased risks of several chronic diseases. OBJECTIVE: To investigate the association between cod liver oil intake and asthma development. METHODS: In the Nord-Trondelag Health Study, a total of 25 616 Norwegian adults aged 19-55 years were followed up from 1995-1997 to 2006-2008. Current analysis based on 17 528 subjects who were free of asthma and had complete information on cod liver oil intake at baseline. Cod liver oil intake was defined as daily intake >/= 1 month during the year prior to baseline. Incident asthma was reported as new-onset asthma during the 11-year follow-up. RESULTS: Of the 17 528 subjects, 18% (n=3076) consumed cod liver oil daily for >/= 1 month over the past year. Cod liver oil intake was significantly associated with incident asthma with an OR of 1.62 (95% CI 1.32 to 1.98) after adjustment for age, sex, daily smoking, physical activity, education, socio-economic status, family history of asthma, and body mass index (BMI). The positive association was consistent across age (< 40/>/= 40 years), sex (men/women), family history of asthma (yes/no) and BMI subgroups (< 25/>/= 25 kg/m(2)). CONCLUSIONS: Intake of cod liver oil with high vitamin A content was significantly associated with increased incidence of adult-onset asthma.  
  Address Department of Public Health and General Practice, Norwegian University of Science and Technology, Trondheim, Norway. xiao-mei.mai@ntnu.no  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0040-6376 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:22977130 Approved no  
  Call Number HUNT @ maria.stuifbergen @ Serial 1424  
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Author Selmeryd, J.; Henriksen, E.; Dalen, H.; Hedberg, P. url  doi
  Title Derivation and Evaluation of Age-Specific Multivariate Reference Regions to Aid in Identification of Abnormal Filling Patterns: The HUNT and VaMIS Studies Type Journal Article
  Year 2017 Publication JACC. Cardiovascular Imaging Abbreviated Journal JACC Cardiovasc Imaging  
  Volume Issue Pages  
  Keywords Doppler; diastolic dysfunction; echocardiography; heart failure; reference values  
  Abstract OBJECTIVES: This study aimed to derive age-specific multivariate reference regions (MVRs) able to classify subjects into those having normal or abnormal filling patterns and to evaluate the prognostic impact of this classification. BACKGROUND: The integration of several parameters is necessary to diagnose disorders of left ventricular (LV) filling because no single measurement accurately describes the complexity of diastolic function. However, no generally accepted validated multiparametric algorithm currently exists. METHODS: A cohort of 1,240 apparently healthy subjects from HUNT (the Nord-Trondelag Health Study) with measured early (E) and late (A) mitral inflow velocity and early mitral annular diastolic tissue velocity (e') were used to derive univariate 95% reference bands and age-specific MVRs. Subsequently, the prognostic impact of this MVR-based classification was evaluated by Cox regression in a community-based cohort (n = 726) and in a cohort of subjects with recent acute myocardial infarction (n = 551). Both evaluation cohorts were derived from VaMIS (the Vastmanland Myocardial Infarction Study). RESULTS: Univariate reference bands and MVRs are presented graphically and as regression equations. After adjustment for sex, age, hypertension, body mass index, diabetes, prior ischemic heart disease, LV mass, LV ejection fraction, and left atrial size, the hazard ratio associated with abnormal filling patterns in the community-based cohort was 3.5 (95% confidence interval: 1.7 to 7.0; p < 0.001) and that in the acute myocardial infarction cohort was 1.8 (95% confidence interval: 1.1 to 2.8; p = 0.011). CONCLUSIONS: This study derived age-specific MVRs for identification of abnormal LV filling patterns and showed, in a community-based cohort and in a cohort of patients with recent acute myocardial infarction, that these MVRs conveyed important prognostic information. An MVR-based classification of LV filling patterns could lead to more consistent diagnostic algorithms for identification of different filling disorders.  
  Address Department of Clinical Physiology, Vastmanland County Hospital, Vasteras, Sweden; Centre for Clinical Research, Uppsala University, Vastmanland County Hospital, Vasteras, Sweden  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1876-7591 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:28734926 Approved no  
  Call Number HUNT @ maria.stuifbergen @ Serial 1977  
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Author Selmeryd, J.; Henriksen, E.; Dalen, H.; Hedberg, P. url  doi
  Title Derivation and Evaluation of Age-Specific Multivariate Reference Regions to Aid in Identification of Abnormal Filling Patterns: The HUNT and VaMIS Studies Type Journal Article
  Year 2018 Publication JACC. Cardiovascular Imaging Abbreviated Journal JACC Cardiovasc Imaging  
  Volume 11 Issue 3 Pages 400-408  
  Keywords Doppler; diastolic dysfunction; echocardiography; heart failure; reference values  
  Abstract OBJECTIVES: This study aimed to derive age-specific multivariate reference regions (MVRs) able to classify subjects into those having normal or abnormal filling patterns and to evaluate the prognostic impact of this classification. BACKGROUND: The integration of several parameters is necessary to diagnose disorders of left ventricular (LV) filling because no single measurement accurately describes the complexity of diastolic function. However, no generally accepted validated multiparametric algorithm currently exists. METHODS: A cohort of 1,240 apparently healthy subjects from HUNT (Nord-Trondelag Health Study) with measured early (E) and late (A) mitral inflow velocity and early mitral annular diastolic tissue velocity (e') were used to derive univariate 95% reference bands and age-specific MVRs. Subsequently, the prognostic impact of this MVR-based classification was evaluated by Cox regression in a community-based cohort (n = 726) and in a cohort of subjects with recent acute myocardial infarction (n = 551). Both evaluation cohorts were derived from VaMIS (the Vastmanland Myocardial Infarction Study). RESULTS: Univariate reference bands and MVRs are presented graphically and as regression equations. After adjustment for sex, age, hypertension, body mass index, diabetes, prior ischemic heart disease, LV mass, LV ejection fraction, and left atrial size, the hazard ratio associated with abnormal filling patterns in the community-based cohort was 3.5 (95% confidence interval: 1.7 to 7.0; p < 0.001) and that in the acute myocardial infarction cohort was 1.8 (95% confidence interval: 1.1 to 2.8; p = 0.011). CONCLUSIONS: This study derived age-specific MVRs for identification of abnormal LV filling patterns and showed, in a community-based cohort and in a cohort of patients with recent acute myocardial infarction, that these MVRs conveyed important prognostic information. An MVR-based classification of LV filling patterns could lead to more consistent diagnostic algorithms for identification of different filling disorders.  
  Address Department of Clinical Physiology, Vastmanland County Hospital, Vasteras, Sweden; Centre for Clinical Research, Uppsala University, Vastmanland County Hospital, Vasteras, Sweden  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1876-7591 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:28734926 Approved no  
  Call Number HUNT @ maria.stuifbergen @ Serial 2149  
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Author Stoylen, A.; Molmen, H.E.; Dalen, H. url  doi
  Title Relation between Mitral Annular Plane Systolic Excursion and Global longitudinal strain in normal subjects: The HUNT study Type Journal Article
  Year 2018 Publication Echocardiography (Mount Kisco, N.Y.) Abbreviated Journal Echocardiography  
  Volume 35 Issue 5 Pages 603-610  
  Keywords Echocardiography/*methods; Female; Heart Ventricles/*diagnostic imaging/physiopathology; Humans; Male; Middle Aged; Mitral Valve/*diagnostic imaging; Prospective Studies; Reference Values; Stroke Volume; Systole; Ventricular Dysfunction, Left/diagnosis/*physiopathology; Ventricular Function, Left/*physiology; *global longitudinal strain; *left ventricular shortening; *mitral annular plane systolic excursion; *normalization  
  Abstract BACKGROUND: Left ventricular (LV) systolic long-axis shortening can be measured as Mitral Annular Plane Systolic Excursion (MAPSE). Global longitudinal strain (GLS) is relative LV shortening, equivalent to normalizing MAPSE for LV length (MAPSEn). The objective of this study was to test whether normalizing LV shortening reduced biological variability of MAPSE due to normalizing for heart size and, possibly BSA. Secondly to provide normal reference values for MAPSE. METHODS AND RESULTS: A total of 1266 subjects from the Nord-Trondelag Health Study (HUNT), without evidence of heart disease were examined. MAPSE and wall lengths were measured in all three standard apical views, while GLS has been published previously. Mean MAPSE was 1.58 (0.25) cm, MAPSEn 16.3 (2.4)%, and GLS 16.7 (2.4)%. All measures declined with age, correlations between -0.50 and -0.41. MAPSE was gender independent, and less BSA dependent than MAPSEn and GLS, while relative standard deviations (SDs) were similar for all three measures. CONCLUSIONS: MAPSE, MAPSEn, and GLS have similar biological variability, which is mainly due to age variation, indicating they are equivalent in normal, and normalizing for BSA will not reduce the variability. Normalizing MAPSE for LV length (MAPSEn and GLS) normalizes for one dimension only, inducing a systematic error, which increases BSA and gender dependence. Normal age-related, gender-independent values for MAPSE are provided.  
  Address Department of Medicine, Levanger Hospital, Nord-Trondelag Hospital Trust, Levanger, Norway  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0742-2822 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:29399886 Approved no  
  Call Number HUNT @ maria.stuifbergen @ Serial 2176  
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