• Altered biomarkers for cardiovascular disease and inflammation in autoimmune Addison's disease - a cross-sectional study 

      Sævik, Åse Bjorvatn; Ueland, Grethe Åstrøm; Åkerman, Anna-Karin; Methlie, Paal; Quinkler, Marcus; Jørgensen, Anders Palmstrøm; Höybye, Charlotte; Debowska, Aleksandra; Nedrebø, Bjørn Gunnar; Dahle, Anne Lise; Carlsen, Siri; Tomkowicz, Aneta; Sollid, Stina Therese; Nermoen, Ingrid; Grønning, Kaja; Dahlqvist, Per; Grimnes, Guri; Skov, Jakob; Finnes, Trine Elisabeth; Valland, Susanna Fonneland; Wahlberg, Jeanette; Holte, Synnøve Emblem; Kämpe, Olle; Bensing, Sophie; Husebye, Eystein Sverre; Øksnes, Marianne (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-09)
      Objective - Increased prevalence of cardiovascular disease has been reported in autoimmune Addison's disease (AAD), but pathomechanisms are poorly understood.<p> <p<Design - Cross-sectional study.<p> <p>Methods - We compared serum levels of 177 cardiovascular and inflammatory biomarkers in 43 patients with AAD at >18-h glucocorticoid withdrawal and 43 matched controls, overall and stratified ...
    • Are pro-inflammatory markers associated with psychological distress in a cross-sectional study of healthy adolescents 15–17 years of age? The Fit Futures study 

      Linkas, Jonas; Ahmed, Luai A.; Csifcsak, Gabor; Emaus, Nina; Furberg, Anne-Sofie; Grimnes, Guri; Pettersen, Gunn; Rognmo, Kamilla; Christoffersen, Tore (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-15)
      Background - Inflammatory markers have been associated with depression and anxiety disorder in adolescents. Less is known about the association between inflammation and subclinical symptoms in the form of psychological distress. We investigated prevalence of psychological distress and examined the associations between common pro-inflammatory markers and psychological distress in an adolescent ...
    • The association between age at menarche and chronic pain outcomes in women: the Tromsø Study, 2007 to 2016 

      Lund, Charlotte I.; Engdahl, Bo Lars; Rosseland, Leiv Arne; Stubhaug, Audun; Grimnes, Guri; Furberg, Anne-Sofie; Steingrímsdóttir, Ólöf Anna; Nielsen, Christopher Sivert (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-01)
      Sex differences in chronic pain are well established with documented predominance in women. This study assessed relationships between age at menarche and chronic pain, site-specific chronic pain, pain characteristics, and chronic widespread pain (CWP). We used data from the Tromsø Study conducted in 2007 to 2008 and 2015 to 2016 (Tromsø 6 and Tromsø 7 waves) including participants aged 30 to 99 ...
    • The association between childhood fractures and adolescence bone outcomes: a population-based study, the Tromsø Study, Fit Futures 

      Christoffersen, Tore; Emaus, Nina; Dennison, Elaine; Furberg, Anne-Sofie; Gracia-Marco, Luis; Grimnes, Guri; Nilsen, Ole-Andreas; Vlachopoulos, Dimitris; Winther, Anne; Ahmed, Luai A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-16)
      <p><i>SUMMARY</i>: Childhood fracture may predict persistent skeletal fragility, but it may also reflect high physical activity which is beneficial to bone development. We observe a difference in the relationship between previous fracture and bone outcome across physical activity level and sex. Further elaboration on this variation is needed.</p> <p><i>PURPOSE</i>: Childhood fracture may be an ...
    • Association of vitamin D status with arterial blood pressure and hypertension risk: A mendelian randomisation study 

      Vimaleswaran, Kerani S.; Cavadino, Alana; Berry, Diane J.; Jorde, Rolf; Grimnes, Guri; Dieffenbach, Aida Karina; Lu, Chen; Alves, Alexessander Couto; Heerspink, Hiddo J. Lambers; Tikkanen, Emmi; Eriksson, Joel; Wong, Andrew; Mangino, Massimo; Jablonski, Kathleen A.; Nolte, Ilja M.; Houston, Denise K.; Ahluwalia, Tarunveer Singh; van der Most, Peter J.; Pasko, Dorota; Zgaga, Lina; Thiering, Elisabeth; Schöttker, B; Saum, KU; Brenner, H; Järvelin, MR; Tzoulaki, I; Snieder, H; Stolk, RP; Hartman, CA; de Boer, RA; van der Harst, P; Navis, G; de Borst, MH; Lorentzon, M; Mellström, D; Ohlsson, C; Hardy, R; Kuh, D; Cooper, JA; Acharya, J; Humphries, SE; Hingorani, AD; Kumari, M; Kivimaki, M; Spector, TD; Kritchevsky, SB; Lohman, KK; Sørensen, TIA; Frayling, TM; Campbell, H; Theodoratou, E; Fraser, RM; Wilson, JF; Rudan, I; Price, JF; McLachlan, S; Vitart, V; Navarro, P; Huffman, JE; Hayward, C; Wright, AF; Tiesler, CMT; Heinrich, J; McCarthy, MI; Ingelsson, E; Arden, N; Cooper, C; Dupuis, J; Herzig, KH; Sebert, S; Pouta, A; Laitinen, J; Kleber, ME; März, W; Jameson, K; Osmond, C; Raitakari, O; Ripatti, S; Lahti, J; Eriksson, JG; Penninx, BW; Billings, LK; Florez, JC; Rejnmark, L; Langdahl, BL; Paternoster, L; Hernandez, DG; Byberg, L; Michaelsson, K; Hagström, E; Melhus, H; Ljunggren, O; Lind, L; Jula, A; Polasek, O; Salomaa, V; Karlsson, M; Bandinelli, S; Lehtimäki, T; Wang, TJ; Pilz, S; Whittaker, JC (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-06-25)
      Background Low plasma 25-hydroxyvitamin D (25[OH]D) concentration is associated with high arterial blood pressure and hypertension risk, but whether this association is causal is unknown. We used a mendelian randomisation approach to test whether 25(OH)D concentration is causally associated with blood pressure and hypertension risk.<p> <p>Methods In this mendelian randomisation study, we generated ...
    • Associations of serum 25-hydroxyvitamin D and subjective sleep measures in an arctic population: Insights from the population-based Tromsø Study 

      Uhlving Larsen, Anette; Hopstock, Laila Arnesdatter; Jorde, Rolf; Grimnes, Guri (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-06)
      Objective - To investigate the relation between serum 25-hydroxyvitamin D (s-25(OH)D) and subjective sleep measures in an Arctic population (69°N).<p> <p>Methods - Cross-sectional data was collected from 21,083 individuals (aged ≥40 years) participating in the population based Tromsø Study: Tromsø7 (2015–2016). The present study included 20,438 participants, after having excluded respondents ...
    • Body weight and body mass index influence bone mineral density in late adolescence in a two-year follow-up study. The Tromsø Study: Fit Futures 

      Nilsen, Ole Andreas; Ahmed, Luai A.; Winther, Anne; Christoffersen, Tore; Thrane, Gyrd; Evensen, Elin; Furberg, Anne-Sofie; Grimnes, Guri; Dennison, Elaine; Emaus, Nina (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-04-04)
      Determinants of bone acquisition in late adolescence and early adulthood are not well‐described. This 2‐year follow‐up study explored the associations of body weight (BW), body mass index (BMI), and changes in weight status with adolescent bone accretion in a sample of 651 adolescents (355 girls and 296 boys) between 15 and 19 years of age from The Tromsø Study: Fit Futures. This Norwegian ...
    • Bone mineral density at the hip and its relation to fat mass and lean mass in adolescents: the Tromsø Study, Fit Futures 

      Winther, Anne; Jørgensen, Lone; Ahmed, Luai A.; Christoffersen, Tore; Furberg, Anne-Sofie; Grimnes, Guri; Jorde, Rolf; Nilsen, Ole-Andreas; Dennison, Elaine M.; Emaus, Nina (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-19)
      <p><i>Background</i>: Positive association between body weight and bone mass is well established, and the concept of body mass index (BMI) is associated with higher areal bone mineral density (aBMD) and reduced fracture risk. BMI, that comprises both fat mass (FM) and lean mass (LM) may contribute to peak bone mass achievement in different ways. This study explored the influence of body composition ...
    • C-Reactive Protein and TGF-α Predict Psychological Distress at Two Years of Follow-Up in Healthy Adolescent Boys: The Fit Futures Study 

      Linkas, Jonas; Ahmed, Luai A.; Csifcsak, Gabor; Emaus, Nina; Furberg, Anne-Sofie; Grimnes, Guri; Pettersen, Gunn; Rognmo, Kamilla; Christoffersen, Tore (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-11)
      Objective: The scarcity of research on associations between inflammatory markers and symptoms of depression and anxiety during adolescence has yielded inconsistent results. Further, not all studies have controlled for potential confounders. We explored the associations between baseline inflammatory markers and psychological distress including moderators at follow-up in a Norwegian adolescent population ...
    • Cause-specific excess mortality after hip fracture: the Norwegian Epidemiologic Osteoporosis Studies (NOREPOS) 

      Holvik, Kristin; Ellingsen, Christian Lycke; Solbakken, Siri Marie; Finnes, Trine Elisabeth; Talsnes, Ove; Grimnes, Guri; Tell, Grethe Seppola; Søgaard, Anne-Johanne; Meyer, Haakon Eduard (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-31)
      Background Information on cause of death may help appraise the degree to which the high excess mortality after hip fracture refects pre-existing comorbidities or the injury itself. We aimed to describe causes of death and causespecifc excess mortality through the frst year after hip fracture.<p> <p>Methods For studying the distribution of causes of death by time after hip fracture, we calculated ...
    • Changes and tracking of bone mineral density in late adolescence: the Tromsø Study, Fit Futures 

      Nilsen, Ole Andreas; Ahmed, Luai A.; Winther, Anne; Christoffersen, Tore; Furberg, Anne-Sofie; Grimnes, Guri; Dennison, Elaine; Emaus, Nina (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-08)
      <p><i>Summary</i>: Areal bone mineral density (aBMD) predicts future fracture risk. This study explores the development of aBMD and associated factors in Norwegian adolescents. Our results indicate a high degree of tracking of aBMD levels in adolescence. Anthropometric measures and lifestyle factors were associated with deviation from tracking.</p> <p><i>Purpose</i>: Norway has one of the highest ...
    • Circulating sex-steroids and Staphylococcus aureus nasal carriage in a general female population 

      Stensen, Dina Benedicte Berg; Småbrekke, Lars; Olsen, Karina; Grimnes, Guri; Nielsen, Christopher Sivert; Sollid, Johanna U Ericson; Simonsen, Gunnar Skov; Almås, Bjørg; Furberg, Anne-Sofie (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02)
      <p>Objective: <i>Staphylococcus aureus</i> is a major human pathogen, and nasal carriers have an increased risk for infection and disease. The exploration of host determinants for nasal carriage is relevant to decrease infection burden. Former studies demonstrate lower carriage prevalence in women and among users of progestin-only contraceptives. The aim of this study was to investigate the possible ...
    • Circulating sex-steroids and Staphylococcus aureus nasal carriage in a general male population 

      Stensen, Dina Benedicte Berg; Småbrekke, Lars; Olsen, Karina; Grimnes, Guri; Nielsen, Christopher Sivert; Ericson, Johanna U; Simonsen, Gunnar Skov; Almås, Bjørg; Furberg, Anne Sofie (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-22)
      Male sex is associated with higher risk of both colonisation and infection with Staphylococcus aureus (S. aureus). However, the role of sex-steroids in colonisation among men is largely unknown. Thus, the aim of this study was to investigate possible associations between circulating sex-steroids and nasal carriage of S. aureus in a general male population. The population-based Tromsø6 study (2007–2008) ...
    • Clinical and laboratory aspects of vitamin D in relation to type 2 diabetes and osteoporosis. Results from the Tromsø Study and two randomized controlled trials. 

      Grimnes, Guri (Doctoral thesis; Doktorgradsavhandling, 2011-11-18)
      There has been a large interest in possible beneficial health effects of increasing the vitamin D (as measured by 25-hydroxyvitamin D (25(OH)D)) levels in the population. Data from the Tromsø Study were used to assess the relation between serum 25(OH)D levels and the risk of subsequent type 2 diabetes in 6119 participants. This risk was approximately doubled in the lowest serum 25(OH)D quartile as ...
    • Cohort profile: Norwegian Epidemiologic Osteoporosis Studies (NOREPOS) 

      Søgaard, Anne Johanne; Meyer, Haakon E; Emaus, Nina; Grimnes, Guri; Gjesdal, Clara Gram; Forsmo, Siri; Schei, Berit; Tell, Grethe Seppola (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-10-02)
      Aims: This paper describes the history, purpose, data collection and contributions in the research collaboration Norwegian Osteoporosis Epidemiologic Studies (NOREPOS). <br>Methods: NOREPOS encompasses almost 85,000 bone mineral density measurements within Cohort of Norway and data on almost 140,000 hip fractures in Norway 1994–2008. Included are anthropometric measurements, blood pressure, ...
    • Combined hormonal contraceptives and vitamin D metabolism in adolescent girls 

      Öberg, Eva Gunnel Johanna; Jorde, Rolf; Figenschau, Professor Yngve; Thorsby, Per Medbøe; Dahl, Sandra Rinne; Winther, Anne; Grimnes, Guri (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-31)
      Objective: Combined hormonal contraceptive (CHC) use has been associated with higher total 25-hydroxyvitamin D (25(OH)D) levels. Here, we investigate the relation between CHC use and vitamin D metabolism to elucidate its clinical interpretation. <p>Methods: The cross-sectional Fit Futures 1 included 1038 adolescents. Here, a subgroup of 182 girls with available 25(OH)D, 1,25-dihydroxyvitamin D ...
    • The DBP Phenotype Gc-1f/Gc-1f is associated with reduced risk of cancer. The Tromsø Study 

      Jorde, Rolf; Schirmer, Henrik; Wilsgaard, Tom; Mathiesen, Ellisiv B.; Løchen, Maja-Lisa; Joakimsen, Ragnar Martin; Grimnes, Guri (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-05-18)
      Background and Objective In addition to its role as a transport protein, the vitamin D binding protein (DBP) may also affect lipid metabolism, inflammation and carcinogenesis. There are three common variants of the DBP, Gc1s (1s), Gc1f (1f), Gc2 (2) that result in six common phenotypes (1s/1s, 1s/ 1f, 1s/2, 1f/1f, 1f/2, and 2/2). These phenotypes can be identified by genotyping for the two single ...
    • Does the frequency and intensity of physical activity in adolescence have an impact on bone? The Tromsø Study, Fit Futures 

      Christoffersen, Tore; Winther, Anne; Nilsen, Ole-Andreas; Ahmed, Luai Awad; Furberg, Anne-Sofie; Grimnes, Guri; Dennison, Elaine; Emaus, Nina (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-10)
      Background: Optimization of the genetic potential for bone accrual in early life may prevent future fractures. Possible modification factors include lifestyle factors such as nutrition and physical activity. Measured levels of bone mineral density (BMD) and bone mass content (BMC) are indicators of bone strength, and are correlated with fracture risk. This study explored the impact of self-reported ...
    • Early menarche and other endocrine disrupting effects of per- and polyfluoroalkyl substances (PFAS) in adolescents from Northern Norway. The Fit Futures study 

      Averina, Maria; Huber, Sandra; Almås, Bjørg; Brox, Jan; Jacobsen, Bjarne K.; Furberg, Anne-Sofie; Grimnes, Guri (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-19)
      Background: Per- and polyfluoroalkyl substances (PFAS) comprise a large group of chemicals that are ubiquitous in the environment and include recognized persistent organic pollutants. The aim of this cross-sectional study was to investigate possible endocrine disrupting effects of different PFAS in adolescents. <p> <p>Methods: Serum concentrations of PFAS, thyroid, parathyroid and steroid hormones ...
    • Effect of genetically low 25-hydroxyvitamin D on mortality risk: Mendelian randomization analysis in 3 large European cohorts 

      Aspelund, Thor; Grübler, Martin R.; Smith, Albert V.; Gudmundsson, Elias F.; Keppel, Martin; Cotch, Mary Frances; Harris, Tamara B.; Jorde, Rolf; Grimnes, Guri; Joakimsen, Ragnar Martin; Schirmer, Henrik; Wilsgaard, Tom; Mathiesen, Ellisiv B.; Njølstad, Inger; Løchen, Maja-Lisa; März, Winfried; Kleber, Marcus E.; Tomaschitz, Andreas; Grove-Laugesen, Diana; Rejnmark, Lars; Swart, Karin M.A.; Brouwer, Ingeborg A.; Lips, Paul; van Schoor, Natasja M.; Sempos, Christopher T.; Durazo-Arvizu, Ramón A.; Škrabáková, Zuzana; Dowling, Kirsten G.; Cashman, Kevin D.; Kiely, Mairead; Pilz, Stefan; Gudnason, Vilmundur; Eiríksdóttir, Gudny (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-02)
      The aim of this study was to determine if increased mortality associated with low levels of serum 25-hydroxyvitamin D (25(OH)D) reflects a causal relationship by using a Mendelian randomisation (MR) approach with genetic variants in the vitamin D synthesis pathway. Individual participant data from three European cohorts were harmonized with standardization of 25(OH)D according to the Vitamin D ...