L. Alexeeva et al., PREVALENCE OF SPONDYLOARTHROPATHIES AND HLA-B27 IN THE NATIVE POPULATION OF CHUKOTKA, RUSSIA, Journal of rheumatology, 21(12), 1994, pp. 2298-2300
Objective. We sought to determine the prevalence and nature of spondyl
oarthropathies (SPA) and the prevalence of HLA-B27 in the native selec
ted circumpolar population of Chukotka, Russia. Methods. We conducted
a cross sectional study that included medical examinations and intervi
ews of 355 of 498 (71.3 %) native residents of 2 Eastern Chukotka sett
lements, Enmelen and Nunligran. Results. Among them were 268 Chukchas,
7 Eskimos, and 80 subjects of mixed race. There were 9 subjects (2.5%
) with SPA, 3 of 7 Chukchas had ankylosing spondylitis (AS) (1.1%), 2
reactive arthritis (ReA), 2 with undifferentiated SPA. Among the mixed
race persons one Chukcha-Eskimo had AS, one Eskimo-Russian had psoria
tic arthritis (PsA). We found a high percentage of HLA-B27 antigen in
the population, 34% in Chukcha natives and 25% in mixed race. Conclusi
on. Our data complement other studies of circumpolar populations and r
einforce the reported high prevalences of SPA and HLA-B27 among those
populations.