Emmanuel Biver

Low and stable prevalence of rheumatoid arthritis in northern France

OBJECTIVES Few data are available on the prevalence of rheumatoid arthritis (RA) in France. Results of the Epidémiologie des rhumatismes inflammatoires (EPIRHUM-2) study suggest a lower prevalence in northern France (0.13%) than nationwide (0.31%) or in southern France (0.66%). Here, our objective was to confirm the lower prevalence of RA in northern France than in the rest of the country or in Europe. METHODS We used the universal health insurance database to identify patients with RA in northern France (Nord-Pas de Calais region) in 2005. RESULTS Seven thousand one hundred and twenty-eight patients of the 3,617,224 individuals receiving health insurance under the plan for salaried workers in the Nord-Pas de Calais region (89.3% of the population in the region) were listed as receiving free care for RA, yielding a prevalence of 197.1/100,000 population (female-to-male ratio, 2.99:1; mean age, 60.8 years). DISCUSSION The prevalence of RA in northern France (0.197% in 2005) is lower than in southern France and northern Europe; thus, the prevalence gradient in France is in the opposite direction to the decreasing north-to-south gradient previously described in Europe. Although environmental and genetic factors involved in the pathogenesis of RA may be involved, the main explanation to the low prevalence in northern France may be the young age of the population.

Changes in the incidence and management of spinal tuberculosis in a French University Hospital Rheumatology Department from 1966 to 2010

INTRODUCTION Two previous single-center studies in a university hospital rheumatology department suggested an increase in the incidence of spinal tuberculosis in France in the 1990s. Our objective in this study was to obtain incidence data on spinal tuberculosis since 1995 in the same department and to describe changes over the entire study period from 1966 to 2010. We also compared patients seen between 1966 and 1995 to those seen between 1995 and 2010. METHODS We conducted a retrospective review of all cases of spinal tuberculosis seen in our rheumatology department between 1966 and June 1995 and between July 1995 and 2010. We collected the annual incidence, clinical and radiological features, and diagnostic and therapeutic strategies. RESULTS One hundred and thirty patients were managed between 1966 and 2010. The number of cases declined in the 1970s and 1980s then increased over the next two decades. None of the patients had HIV infection. Over 70% of patients were from continental France. Compared to patients seen during the earlier period, those seen after June 1995 were older (62.8±17.2 vs. 53±14.3 years, P=0.0006), had more comorbidities, and more often exhibited severe radiological findings (including multilevel involvement, epidural involvement, and abscesses). No changes occurred in time to diagnosis or management strategies. CONCLUSION The incidence of spinal tuberculosis in a university hospital rheumatology department has increased over the last two decades, chiefly as a result of reactivation of past tuberculosis, as opposed to origin from endemic countries or HIV infection.

Pregnancy during TNFα antagonist therapy: Beware the rifampin-oral contraceptive interaction. Report of two cases

We report two cases of pregnancy in patients taking TNFalpha antagonists for chronic inflammatory joint disease. A factor in both pregnancies was the use of rifampin concomitantly with a combined oral contraceptive. Both patients were taking rifampin and isoniazid for tuberculosis prophylaxis in compliance with French recommendations for patients with positive intradermal tuberculin tests who are scheduled to receive biotherapeutic agents.