Colorectal Cancer Incidence and Mortality After Negative Colonoscopy Screening Results.

Importance: The current recommendation for a 10-year rescreening interval after a negative colonoscopy screening (NCS) result has been questioned, with some studies showing a persistently lower risk of colorectal cancer (CRC) after NCS results.

Objective: To examine long-term CRC incidence and mortality after NCS results (ie, no presence of CRC or polyps) and according to a risk score based on major demographic and lifestyle risk factors.

Design, Setting, And Participants: In this cohort study, 3 prospective US population-based cohorts from the Nurses' Health Study, Nurses' Health Study II, and Health Professionals Follow-up Study were followed up from 1988 and 1991 to 2020.

Reproducibility and comparison of a digital food frequency questionnaire (DIGIKOST-FFQ) assessing adherence to national diet and lifestyle recommendations.

Background: We have developed a digital semi-quantitative food frequency and lifestyle questionnaire, the DIGIKOST-FFQ, based on the validated paper-based NORDIET-FFQ.

Objective: The study aims to investigate the reproducibility of the DIGIKOST-FFQ and to compare the DIGIKOST-FFQ against the NORDIET-FFQ for the adjusted questions for intakes of fruits, vegetables, whole grains, fish, meat, and dairy products.

Design: Participants were recruited from May to September 2021 through a random sample from the National Population Register and advertisements on Facebook in Norway.

Dietary trajectories over 21 years and frailty in Norwegian older adults: the Tromsø Study 1994-2016.

Purpose: To investigate the association between five dietary trajectories over 21 years and frailty in Norwegian older adults.

Methods: This study used data from three surveys of the Tromsø Study. Diet was measured using food frequency questionnaires at baseline (Tromsø4, 1994-95), after 7 years (Tromsø5, 2001) and at the end of follow-up (Tromsø7, 2015-16).

Does the association between adiposity measures and pre-frailty among older adults vary by social position? Findings from the Tromsø study 2015/2016.

Introduction: Pre-frailty provides an ideal opportunity to prevent physical frailty and promote healthy ageing. Excess adiposity has been associated with an increased risk of pre-frailty, but limited studies have explored whether the association between adiposity measures and pre-frailty varies by social position.

Methods: We used data from the seventh survey of the Tromsø Study (Tromsø7) conducted in 2015-2016.

Digital Food Frequency Questionnaire Assessing Adherence to the Norwegian Food-Based Dietary Guidelines and Other National Lifestyle Recommendations: Instrument Validation Study.

Background: Valid assessment tools are needed when investigating adherence to national dietary and lifestyle guidelines.

Objective: The relative validity of the new digital food frequency questionnaire, the DIGIKOST-FFQ, against 7-day weighed food records and activity sensors was investigated.

Methods: In total, 77 participants were included in the validation study and completed the DIGIKOST-FFQ and the weighed food record, and of these, 56 (73%) also used the activity sensors.