… Author links open overlay panel Lars Grøvle a , Anne J. Haugen a , Eivind Hasvik b c , Bård
… Leiv Sandvik for statistical advice and Anne Keller, Eli Molde Hagen, Dag Soldal, Knut …

… Author links open overlay panel Lars Grøvle MD, PhD a , Anne J. Haugen MD, PhD a , Anne
Keller MD, PhD b , Bård Ntvig MD, PhD c d , Jens I. Brox MD, PhD e , Margreth Grotle PT, …

Objective. Presence and levels of antibodies contribute to the classification of rheumatoid
arthritis. We investigated the longitudinal course of anti-citrullinated protein antibodies (ACPA) …

Introduction We wanted to assess the importance of the levels of anti-citrullinated peptide
antibody (anti-CCP) and immunoglobulin M (IgM) rheumatoid factor (RF) in predicting …

OBJECTIVE: To investigate the agreement between self-report and a public registry regarding
the occurrence and duration of sickness absence (SA) in patients with sciatica. STUDY …

OBJECTIVE: Chronic nonspecific low back pain is accompanied by high rates of comorbid
mental and physical conditions. The aims of this study were to investigate if patients with …

Introduction The current 1987 American College of Rheumatology (ACR) classification criteria
for rheumatoid arthritis (RA) have proven less useful in early arthritis. The objective of this …

Objective. To examine the 2-year disease course in patients with undifferentiated arthritis (UA)
focusing on fulfillment of the 2010 American College of Rheumatology/European League …

Objective To determine how the European League Against Rheumatism (EULAR) definition
of erosive disease (erosion criterion) contributes to the number of patients classified as …

Objectives To study occurrence of and factors associated with self-limiting arthritis among
patients fulfilling the 2010 ACR/EULAR classification criteria for rheumatoid arthritis (RA) (…