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List of works by Roar Johnsen

A primary health-care intervention on pre- and postnatal risk factor behavior to prevent childhood allergy. The Prevention of Allergy among Children in Trondheim (PACT) study

scientific article

Accuracy of Helicobacter pylori serology in two peptic ulcer populations and in healthy controls

scientific article published on August 2008

Adolescent health and high school dropout: a prospective cohort study of 9000 Norwegian adolescents (the Young-HUNT)

scientific article

Agreement of specific IgE and skin prick test in an unselected cohort of two-year-old children

scientific article published on 30 September 2011

Allergy related disorders among 2-yrs olds in a general population. The PACT Study

scientific article published on 09 December 2009

Assessing atopic disease in children two to six years old: reliability of a revised questionnaire.

scientific article published in September 2008

Associations Between the Readiness for Return to Work Scale and Return to Work: A Prospective Study.

scientific article published on 16 March 2017

Atopic dermatitis among 2-year olds; high prevalence, but predominantly mild disease--the PACT study, Norway

scientific article

Atopic dermatitis prevention in children following maternal probiotic supplementation does not appear to be mediated by breast milk TSLP or TGF-β.

scientific article published on 22 July 2016

Attitudes towards sickness absence and sickness presenteeism in health and care sectors in Norway and Denmark: a qualitative study

scientific article

Breastfeeding-associated microbiota in human milk following supplementation with Lactobacillus rhamnosus GG, Lactobacillus acidophilus La-5, and Bifidobacterium animalis subspecies lactis Bb-12.

scientific article published on 13 December 2017

Changes among male and female visitors to practitioners of complementary and alternative medicine in a large adult Norwegian population from 1997 to 2008 (The HUNT studies)

scientific article

Changes in fear-avoidance beliefs and work participation after occupational rehabilitation for musculoskeletal- and common mental disorders: secondary outcomes of two randomized clinical trials

scientific article published on 01 March 2019

Culture dependent and independent analyses suggest a low level of sharing of endospore-forming species between mothers and their children

scientific article published on 04 February 2020

Design of a study evaluating the effects, health economics, and stakeholder perspectives of a multi-component occupational rehabilitation program with an added workplace intervention - a  study protocol

scientific article

Diversity of vaginal microbiota increases by the time of labor onset.

scientific article published on 14 December 2017

Diversity, transmission and persistence of Escherichia coli in a cohort of mothers and their infants.

scientific article

Do early intake of fish and fish oil protect against eczema and doctor-diagnosed asthma at 2 years of age? A cohort study

scientific article published on 06 August 2009

Documentation and disclosure of adverse events that led to compensated patient injury in a Norwegian university hospital

scientific article

Does Maternal Perinatal Probiotic Supplementation Alter the Intestinal Microbiota of Mother and Child?

scientific article published on August 2015

Early eczema and the risk of childhood asthma: a prospective, population-based study

scientific article

Effect of Inpatient Multicomponent Occupational Rehabilitation Versus Less Comprehensive Outpatient Rehabilitation on Sickness Absence in Persons with Musculoskeletal- or Mental Health Disorders: A Randomized Clinical Trial

scientific article published on 11 April 2017

Effect of in-hospital comprehensive geriatric assessment (CGA) in older people with hip fracture. The protocol of the Trondheim Hip Fracture trial

scientific article

Effect of probiotics in prevention of atopic dermatitis is dependent on the intrinsic microbiota at early infancy

scientific article published on 05 December 2016

Effectiveness of adding a workplace intervention to an inpatient multimodal occupational rehabilitation program: A randomized clinical trial

scientific article published on 13 December 2019

Effectiveness of an intermediate care hospital on readmissions, mortality, activities of daily living and use of health care services among hospitalized adults aged 60 years and older--a controlled observational study.

scientific article published on 28 August 2015

Effects of Inpatient Multicomponent Occupational Rehabilitation versus Less Comprehensive Outpatient Rehabilitation on Somatic and Mental Health: Secondary Outcomes of a Randomized Clinical Trial

scientific article published on 4 November 2016

Family eczema-history in 2-year olds with eczema; a prospective, population-based study. The PACT-study, Norway ⬇️

scientific article published on May 20, 2011

Fish Consumption at One Year of Age Reduces the Risk of Eczema, Asthma and Wheeze at Six Years of Age

scientific article published on 21 August 2019

Gender differences in health care use among the elderly population in areas of Norway and Finland. A cross-sectional analysis based on the HUNT study and the FINRISK Senior Survey

scientific article published on 4 September 2006

High school dropout and long-term sickness and disability in young adulthood: a prospective propensity score stratified cohort study (the Young-HUNT study).

scientific article

High-Resolution Analyses of Overlap in the Microbiota Between Mothers and Their Children.

scientific article published on 5 June 2015

Hospital discharge of elderly patients to primary health care, with and without an intermediate care hospital - a qualitative study of health professionals' experiences

scientific article

Human Breast Milk miRNA, Maternal Probiotic Supplementation and Atopic Dermatitis in Offspring

scientific article published on 14 December 2015

Implementation of an electronic surgical referral service. Collaboration, consensus and cost of the surgeon - general practitioner Delphi approach

scientific article

Improved Expectations About Length of Sick Leave During Occupational Rehabilitation Is Associated with Increased Work Participation

scientific article published on 01 September 2019

Inpatient multimodal occupational rehabilitation reduces sickness absence among individuals with musculoskeletal and common mental health disorders: a randomized clinical trial

scientific article published on 05 January 2020

Intermediate care at a community hospital as an alternative to prolonged general hospital care for elderly patients: a randomised controlled trial

scientific article

Intestinal microbiota and its effect on the immune system--a nested case-cohort study on prevention of atopy among small children in Trondheim: the IMPACT study

scientific article published on 07 April 2006

Length of sick leave - why not ask the sick-listed? Sick-listed individuals predict their length of sick leave more accurately than professionals

scientific article

Liquid array diagnostics: a novel method for rapid detection of microbial communities in single-tube multiplex reactions

scientific article published on 01 March 2019

Low Maternal Microbiota Sharing across Gut, Breast Milk and Vagina, as Revealed by 16S rRNA Gene and Reduced Metagenomic Sequencing.

scientific article published in May 2018

Major faecal microbiota shifts in composition and diversity with age in a geographically restricted cohort of mothers and their children.

scientific article

Maternal smoking cessation in early pregnancy and offspring weight status at four years of age. A prospective birth cohort study

scientific article published on 3 July 2008

Mortality and work disability in a cohort of Norwegian couples--the HUNT study

scientific article

Motivational interviewing in long-term sickness absence: study protocol of a randomized controlled trial followed by qualitative and economic studies.

scientific article published on 18 June 2018

Occupational rehabilitation programs for musculoskeletal pain and common mental health disorders: study protocol of a randomized controlled trial

scientific article

Perinatal probiotic supplementation in the prevention of allergy related disease: 6 year follow up of a randomised controlled trial

scientific article published on August 2015

Potential association of vacuum cleaning frequency with an altered gut microbiota in pregnant women and their 2-year-old children

scientific article published on 21 December 2015

Rehabilitation time before disability pension

scientific article

Reliability of sickness certificates in detecting potential sick leave reduction by modifying working conditions: a clinical epidemiology study

scientific article

School dropout: a major public health challenge: a 10-year prospective study on medical and non-medical social insurance benefits in young adulthood, the Young-HUNT 1 Study (Norway) ⬇️

scientific article published on February 6, 2012

Should the surgeon or the general practitioner (GP) follow up patients after surgery for colon cancer? A randomized controlled trial protocol focusing on quality of life, cost-effectiveness and serious clinical events

scientific article

Sick-listed persons' experiences with taking part in an in-patient occupational rehabilitation program based on Acceptance and Commitment Therapy: a qualitative focus group interview study.

scientific article

Sick-listed workers' experiences with motivational interviewing in the return to work process: a qualitative interview study

scientific article published on 28 February 2020

Sickness absence patterns and trends in the health care sector: 5-year monitoring of female municipal employees in the health and care sectors in Norway and Denmark

scientific article

Social inequalities in patient experiences with general practice and in access to specialists: the population-based HUNT Study

scientific article

Temporal Development of the Infant Gut Microbiota in Immunoglobulin E-Sensitized and Nonsensitized Children Determined by the GA-Map Infant Array ⬇️

scientific article published on June 8, 2011

Temporal changes in health within 5 years before and after disability pension-the HUNT Study

scientific article published on 20 June 2017

The commensal infant gut meta-mobilome as a potential reservoir for persistent multidrug resistance integrons.

scientific article

The impact of a minimal smoking cessation intervention for pregnant women and their partners on perinatal smoking behaviour in primary health care: a real-life controlled study

scientific article

The impact of pre- and postnatal exposures on allergy related diseases in childhood: a controlled multicentre intervention study in primary health care.

scientific article

The influence of an intermediate care hospital on health care utilization among elderly patients--a retrospective comparative cohort study

scientific article

The one-stop trial: does electronic referral and booking by the general practitioner (GPs) to outpatient day case surgery reduce waiting time and costs? A randomized controlled trial protocol

scientific article published on 11 August 2008

The predictive value of allergen skin prick tests and IgE tests at pre-school age: the PACT study

scientific article published on 21 November 2014

The profiles of adults who consult alternative health practitioners and/or general practitioners

scientific article

The quality of communication about older patients between hospital physicians and general practitioners: a panel study assessment

scientific article

Unemployment and disability pension-an 18-year follow-up study of a 40-year-old population in a Norwegian county ⬇️

scientific article published on February 28, 2012

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