Epidemiology of rheumatic and musculoskeletal diseases in a Nigerian peri-urban community: results of a cross-sectional survey using the COPCORD stage 1 model.

Introduction: There is relative neglect of rheumatic and musculoskeletal diseases (RMDs) in sub-Saharan Africa (SSA). While hospital-based reports on RMDs abound, there is a paucity of population-based reports on these conditions which are otherwise recognized to cause functional disability and reduced quality of life in the affected individuals. Thus, the objective of this study is to determine the prevalence, diagnostic types, and predictors of musculoskeletal (MSK) pain in Agbowa, a peri-urban community in Lagos, South-West Nigeria.

Material and methods: This community-based survey utilized the World Health Organisation/International League of Association of Rheumatology Community Oriented Programme for the Control of Rheumatic Diseases (WHO/ILAR COPCORD) stage 1 model. All respondents had their profiles documented via modified COPCORD questionnaires. Pain intensity and functional disability were assessed by the Numerical Rating Scale (NRS) and Health Assessment Questionnaires Disability Index (HAQ-DI) respectively. The rheumatic and musculoskeletal diseases were classified using relevant validated criteria. Data obtained were analysed using SPSS Version 21.

Results: There were 3056 respondents who were predominantly female (59.2%). The period prevalence of MSK pain among the 3056 respondents was 58% (n = 1,773). There were significantly more females with MSK pain than males (62.8% vs. 37.2%, p = 0.001). Overall, 380 (12.4%) subjects had clinically diagnosed RMDs. The common RMDs in decreasing order were osteoarthritis (n = 185, 6.1%), chronic low back pain (n = 95, 3.1%) and soft tissue rheumatism (n = 52, 1.7%). The bivariate analysis showed that female sex, family history of MSK conditions, history of previous trauma, and some comorbidities were significantly associated with MSK pain. The median HAQ-DI was 0.6 (IQR 0.1-1.8) with significant disability (HAQ-DI ≥ 1) in 39.5% of the subjects.

Conclusions: The burden and impacts of these conditions are considerable. Thus, the government needs to devise programmes and policies to limit the effects of RMDs in such communities.