Spectrum of Rheumatic and Musculoskeletal Diseases in a Rheumatology Clinic in Nigeria: A Report of the First 5000...

Rheumatic and musculoskeletal diseases (RMDs) are important causes of morbidity, disability, and mortality worldwide, including in sub-Saharan Africa. However, the spectrum of RMDs in this region has not been well documented due to a lack of data. This is particularly true since many of the diseases observed were previously considered rare among Africans. This study aims to identify the various RMDs seen in a private rheumatology facility in Lagos, Nigeria.

The case records of the first 5,000 consecutive patients diagnosed with RMDs between January 2004 and May 2022 were reviewed. Diagnoses were made using standard rheumatology guidelines/consensus, societal guidelines, or clinical evaluation. Data analysis was performed using the Statistical Package for Social Sciences (SPSS) version 26.

The mean ± SD age of the 5,000 patients was 52.33 ± 16.15 years, with a female-to-male ratio of 1.7:1. The frequency of the common RMDs were degenerative joint diseases (54.16%), followed by inflammatory arthritis (14.52%), soft tissue rheumatism (13.28%) and connective tissue diseases (10.32%). Females were more commonly affected in all categories except crystal arthropathies and spondyloarthropathy. Septic arthritis, metabolic bone diseases, and orphan diseases were rarely seen, at 0.26%, 0.28%, and 0.82% of the total, respectively.

This study, which includes arguably the largest cohort of RMD patients in sub-Saharan Africa, revealed a wide spectrum of RMDs, contrary to previous assumptions that RMDs are rare among Africans. As this is a hospital-based study, large population-based studies are recommended to determine the burden of RMDs in the community to guide policy implementation and resource allocation.