Rheumatoid Factor

01/01/2010 - "Development of a "gold standard" laboratory test has appeared attractive for care of patients with rheumatoid arthritis (RA) since rheumatoid factor was identified in the 1940s. "
01/01/2013 - "Furthermore, different rheumatoid factor isotypes alone or in combination can be helpful when managing rheumatoid arthritis patients, from the time of diagnosis until deciding on the choice of therapeutic strategy. "
02/01/1991 - "A prospective phase II trial was conducted to assess the feasibility, tolerance, and efficacy of a device designed for selective removal of rheumatoid factor from the plasma of rheumatoid arthritis patients. "
08/01/2003 - "Reduced burden of disease and improved outcome of patients with rheumatoid factor positive rheumatoid arthritis compared with dropouts. "
08/01/1981 - "Rheumatoid factor is likewise rather nonspecific, but its presence is helpful in predicting the course, severity, and complications of rheumatoid arthritis. "

04/01/2006 - "Remission was seen in 34.3% of patients and was independently related to age 60 and older (odds ratio (OR) 3.2; 95% confidence interval (CI), 1.2-8.7) and inversely to the presence of rheumatoid factor (RF) (OR 8.3; 95% CI, 3.2-21.3 for persistent arthritis). "
11/01/2005 - "Children with persistent or extended oligoarthritis, polyarthritis (either rheumatoid factor [RF] positive or RF negative), or systemic JIA who had been followed up for a period of at least 4 years were evaluated for episodes of inactive disease, clinical remission on medication, and clinical remission off medication. "
01/01/2016 - "Of 120 patients, 49 patients were ANA positive (31 oligoarthritis, 18 rheumatoid factor [RF]-negative polyarthritis) and 71 patients were ANA negative (48 oligoarthritis, 23 RF-negative polyarthritis), and were recruited retrospectively to this study according to the International League of Associations for Rheumatology (ILAR) criteria. "
01/01/2014 - "This study aimed to investigate rheumatoid factor (RF) and anti-citrullinated protein antibody (ACPA) status and levels as predictors of mortality in two large cohorts of patients with early inflammatory arthritis (EIA). "
09/01/2009 - "Patients ages 2-18 years with rheumatoid factor (RF)-positive or RF-negative polyarthritis, systemic JIA, or extended oligoarthritis were eligible for the study. "

01/01/1987 - "From a method of opinion sampling, OA of the hip may be suggested by a combination of clinical criteria including the following: age greater than 40 years, weight-bearing pain, pain relieved by sitting, antalgic gait, decreased painful range of motion, a normal erythrocyte sedimentation rate (ESR) and a negative rheumatoid factor test."
09/01/2014 - "Furthermore, many normal people have a positive test for rheumatoid factor or ACPA but do not have RA, even among those with extensive musculoskeletal pain ('false-positive' results). "
01/01/2005 - "Predictors of remission were early response to initial treatment, less pain, rheumatoid factor negativity, and lower joint score at baseline. "
08/01/2015 - "However, the RA patients with GA genotype of TIM-4 have higher grade of rheumatoid factor (RF) positivity (P = 0.018), and have worse disease-related disability (P = 0.007) and worse pain (0.025). "
05/01/2015 - "The EM group had higher mean patient global and pain scores and was more likely to be rheumatoid factor (RF) positive and meet the 1987 American College of Rheumatology criteria for RA. "

03/01/1996 - "These results show that all four assays can be recommended for diagnostic purposes, although false-positive results may be seen with other acute viral infections, healthy pregnant women, and rheumatoid factor-positive samples."
11/01/1989 - "Therefore, if the rheumatoid factor is eliminated, the test is more specific for cryptococcal infection. "
03/01/2014 - "Rheumatoid factor (RF) can be seen in hepatitis B virus (HBV) infection. "
02/01/2010 - "Patients with HCV infection may have rheumatic symptoms and signs, and 50-70% of the cases may contain rheumatoid factor (RF). "
09/01/2008 - "Positivity of rheumatoid factor (RF) in the course of Hepatitis C virus HCV infection has been described in many papers, with percentages between 30% and 80%, but no data are reported on the behaviour of this parameter during the treatment. "

09/01/1986 - "In no case was rheumatoid factor testing helpful in establishing a diagnosis of juvenile rheumatoid arthritis or in ruling it out. "
03/01/2012 - "However, only a limited number of studies have investigated these alleles in patients with childhood-onset RA, which is defined as rheumatoid factor- and/or anti-citrullinated protein antibody-positive juvenile idiopathic arthritis. "
01/01/2005 - "The aim of this study was to examine susceptibility in Finnish patients with persistent oligoarticular and polyarticular rheumatoid factor (RF)-negative juvenile idiopathic arthritis (JIA) due to the presence of the SLC11A1 locus on chromosome 2. A total of 234 Finnish JIA nuclear families and 639 elderly Finnish controls without a history of JIA were evaluated for association with JIA at 3 intragenic single-nucleotide polymorphisms: an intragenic insertion/deletion, a promoter microsatellite (NRAMP1), and a 3' microsatellite (D2S1471). "
02/01/1989 - "Variation in the CD4/non-T autologous mixed lymphocyte reaction (AMLR) with disease activity in juvenile rheumatoid arthritis (JRA) was evaluated by repeated study of 5 patients with rheumatoid factor (RF) negative and 8 patients with seropositive polyarticular onset. "
01/01/2014 - "Our objective was to utilise network analysis to identify protein clusters of greatest potential functional relevance in the pathogenesis of oligoarticular and rheumatoid factor negative (RF-ve) polyarticular juvenile idiopathic arthritis (JIA). "