-transparent.png){kind=logo}
To study the occurrence of rheumatoid factors (RF) in relation to the activity of rheumatoid arthritis and the occurrence of vasculitis, RF of IgM, IgA, and IgG classes were measured in sera from 35 patients with definite or classic rheumatoid arthritis (RA) using ELISA. For 26 patients, the RF levels were studied longitudinally and compared with changes in the articular index. Although IgM RF was occasionally found in patients without RA, IgA and/or IgG RF were almost exclusively associated with RA. The titers of IgM, IgA, and IgG RF were significantly higher in sera from patients with clinically diagnosed rheumatoid vasculitis than in sera from patients without vasculitis. No significant correlation between changes in the articular index and changes in titer of any class-specific RF could be found for the group of RA patients as a whole. However, in individual patients, increases or decreases in IgM and IgG RF titer were significantly correlated with an increase or decrease in the articular index.
M L Westedt, and
P Herbrink, and
J L Molenaar, and
E de Vries, and
P Verlaan, and
T Stijnen, and
A Cats, and
J Lindeman
July 1996,
Orvosi hetilap,
M L Westedt, and
P Herbrink, and
J L Molenaar, and
E de Vries, and
P Verlaan, and
T Stijnen, and
A Cats, and
J Lindeman
May 1994,
Current opinion in rheumatology,
M L Westedt, and
P Herbrink, and
J L Molenaar, and
E de Vries, and
P Verlaan, and
T Stijnen, and
A Cats, and
J Lindeman
January 2009,
Current opinion in rheumatology,
M L Westedt, and
P Herbrink, and
J L Molenaar, and
E de Vries, and
P Verlaan, and
T Stijnen, and
A Cats, and
J Lindeman
October 1985,
Nihon rinsho. Japanese journal of clinical medicine,
M L Westedt, and
P Herbrink, and
J L Molenaar, and
E de Vries, and
P Verlaan, and
T Stijnen, and
A Cats, and
J Lindeman
December 1976,
Proceedings of the Royal Society of Medicine,
M L Westedt, and
P Herbrink, and
J L Molenaar, and
E de Vries, and
P Verlaan, and
T Stijnen, and
A Cats, and
J Lindeman
April 2013,
Presse medicale (Paris, France : 1983),
M L Westedt, and
P Herbrink, and
J L Molenaar, and
E de Vries, and
P Verlaan, and
T Stijnen, and
A Cats, and
J Lindeman
January 1978,
Revista espanola de reumatismo y enfermedades osteoarticulares,
M L Westedt, and
P Herbrink, and
J L Molenaar, and
E de Vries, and
P Verlaan, and
T Stijnen, and
A Cats, and
J Lindeman
December 2014,
QJM : monthly journal of the Association of Physicians,
M L Westedt, and
P Herbrink, and
J L Molenaar, and
E de Vries, and
P Verlaan, and
T Stijnen, and
A Cats, and
J Lindeman
April 1975,
Archives of neurology,
M L Westedt, and
P Herbrink, and
J L Molenaar, and
E de Vries, and
P Verlaan, and
T Stijnen, and
A Cats, and
J Lindeman
May 1981,
British medical journal (Clinical research ed.),
