Blar i Department of Mathematics på forfatter "Heuch, Ivar"
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Assessing uncertainty in knowledge-based systems for data analysis by simulation
Aarseth, Jan H.; Heuch, Ivar (Statistical report no. 30, Research report, 1996-08) -
Association between body height and chronic low back pain: a follow-up in the Nord-Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker (Peer reviewed; Journal article, 2015-06-15)Objective: To study potential associations between body height and subsequent occurrence of chronic low back pain (LBP). Design: Prospective cohort study. Setting: The North-Trøndelag Health Study (HUNT). Data were ... -
Associations between the number of children, age at childbirths and prevalence of chronic low back pain: the Nord-Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Storheim, Kjersti; Zwart, John-Anker (Journal article; Peer reviewed, 2020)Background Associations between childbirths and subsequent risk of low back pain (LBP) have not been clarified. Changes in sex hormone levels or lumbar posture during pregnancy may have an impact on LBP later in life. The ... -
A Comparison of Anthropometric Measures for Assessing the Association between Body Size and Risk of Chronic Low Back Pain: TheHUNT Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker (Peer reviewed; Journal article, 2015-10-27)Background: Previous work indicates that overweight and obese individuals carry an increased risk of experiencing chronic low back pain (LBP). It is not known, however, how the association with body size depends on the ... -
Data on gender contrasts in the risk of incident myocardial infarction by age. The Tromsø Study 1979-2012
Albrektsen, Grethe; Heuch, Ivar; Løchen, Maja-Lisa; Thelle, Dag Steinar; Wilsgaard, Tom; Njølstad, Inger; Bønaa, Kaare (Peer reviewed; Journal article, 2017-08)The data presented in this article relate to the research article entitled “Risk of incident myocardial infarction by gender: Interactions with serum lipids, blood pressure and smoking. The Tromsø Study 1979–2012” (Albrektsen ... -
Do abnormal serum lipid levels increase the risk of chronic low back pain? The Nord-Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker (Peer reviewed; Journal article, 2014-09-18)Background: Cross-sectional studies suggest associations between abnormal lipid levels and prevalence of low back pain (LBP), but it is not known if there is any causal relationship. Objective: The objective was to determine, ... -
Does diabetes influence the probability of experiencing chronic low back pain? A population-based cohort study: the Nord-Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Sørgjerd, Elin Pettersen; Åsvold, Bjørn Olav; Zwart, John-Anker (Peer reviewed; Journal article, 2019)Objective: Low back pain (LBP) is a major problem in modern society and it is important to study possible risk factors for this disorder. People with diabetes are often affected by LBP, but whether diabetes represents a ... -
Does the risk of chronic low back pain depend on age at menarche or menopause? A population-based cross-sectional and cohort study: the Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Storheim, Kjersti; Zwart, John Anker Henrik (Journal article; Peer reviewed, 2022)Objective In most population-based studies of low back pain (LBP), women have a higher risk than men, possibly reflecting hormonal influences. The aim of this study was to explore associations between age at menarche and ... -
Effects of a parent-administered exercise program in the neonatal intensive care unit: Dose does matter-a randomized controlled trial
Øberg, Gunn Kristin; Girolami, Gay L; Campell, Suzann K.; Ustad, Tordis; Heuch, Ivar; Jacobsen, Bjarne K.; Kaaresen, Per Ivar; Aulie, Vibeke Smith; Jørgensen, Lone (Journal article; Peer reviewed, 2020)Background Despite the risk of delayed motor development in infants born preterm, knowledge about interventions in the neonatal intensive care unitt (NICU) and the effects of dosing is sparse. Objective The objectives ... -
Equitable access to cancer patient pathways in Norway – a national registry-based study
Olsen, Frank; Jacobsen, Bjarne K.; Heuch, Ivar; Tveit, Magne Kjell; Balteskard, Lise (Journal article; Peer reviewed, 2021)Background In 2015, cancer patient pathways (CPP) were implemented in Norway to reduce unnecessary non-medical delay in the diagnostic process and start of treatment. The main aim of this study was to investigate the ... -
Er konsum av melk og egg assosiert med risiko for kreft? Foreløpige resultater fra en prospektiv undersøkelse
Albrektsen, Grethe; Heuch, Ivar; Jacobsen, Bjarne K.; Kvåle, Gunnar (Peer reviewed; Journal article, 1997) -
Impact of parents' education on variation in hospital admissions for children: a population-based cohort study
Olsen, Frank; Balteskard, Lise; Uleberg, Bård Erling; Jacobsen, Bjarne K.; Heuch, Ivar; Moen, Atle (Journal article; Peer reviewed, 2021)Objectives To assess the impact of parental educational level on hospital admissions for children, and to evaluate whether differences in parents' educational level can explain geographic variation in admission rates. ... -
Improving the error rates of the Begg and Mazumdar test for publication bias in fixed effects meta-analysis
Gjerdevik, Miriam; Heuch, Ivar (Peer reviewed; Journal article, 2014-09-22)Background: The rank correlation test introduced by Begg and Mazumdar is extensively used in meta-analysis to test for publication bias in clinical and epidemiological studies. It is based on correlating the standardized ... -
Interfaces in a knowledge-based statistical system, as exemplified by Express
Aarseth, Jan H.; Heuch, Ivar (Statistical report no. 29, Research report, 1996-07) -
Is chronic low back pain a risk factor for diabetes? The Nord-Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Sørgjerd, Elin Pettersen; Åsvold, Bjørn Olav; Zwart, John-Anker (Peer reviewed; Journal article, 2018)Objective: The purpose of this study was to examine the risk of diabetes associated with the presence or absence of chronic low back pain, considering both cross-sectional and cohort data. Research design and methods: ... -
Is there a U-shaped relationship between physical activity in leisure time and risk of chronic low back pain? A follow-up in the HUNT Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker (Peer reviewed; Journal article, 2016-04-11)Background: Physical activity in leisure time is often considered to have favourable effects on the risk of low back pain (LBP), but demonstrating a definite association in epidemiological studies has proven difficult. The ... -
Is there an Association between vitamin D status and risk of chronic low back pain? A nested case-Control analysis in the Nord-Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Mai, Xiao-Mei; Langhammer, Arnulf; Zwart, John-Anker (Peer reviewed; Journal article, 2017-11-25)Objectives: To explore potential associations between vitamin D status and risk of chronic low back pain (LBP) in a Norwegian cohort, and to investigate whether relationships depend on the season of blood sample collection. ... -
Lipid Levels During Adult Lifetime in Men and Women With and Without a Subsequent Incident Myocardial Infarction: A Longitudinal Analysis of Data From the Tromsø Study 1974 to 2016
Albrektsen, Grethe; Wilsgaard, Tom; Heuch, Ivar; Løchen, Maja-Lisa; Thelle, Dag Steinar; Njølstad, Inger; Grimsgaard, Sameline; Bønaa, Kaare Harald (Journal article; Peer reviewed, 2023)Background The atherosclerotic effect of an adverse lipid profile is assumed to accumulate throughout life, leading to increased risk of myocardial infarction (MI). Still, little is known about age at onset and duration ... -
Logistrule: A knowledge-based system for logistic regression
Aarseth, Jan H.; Heuch, Ivar (Statistical report no. 28, Research report, 1996-07) -
Menopausal hormone therapy, oral contraceptives and risk of chronic low back pain: the HUNT Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Storheim, Kjersti; Zwart, John Anker Henrik (Journal article; Peer reviewed, 2023)Background There are indications that use of menopausal hormone therapy (MHT) and oral contraceptives (OC) increases the risk of low back pain (LBP), with higher oestrogen levels involved in the underlying mechanisms. The ...