Raíssa Sudré Cezarino1, Jefferson Rosa Cardoso2, Kedma Neves Rodrigues1, Yasmin Santana Magalhães1, Talita Yokoy de Souza3, Lícia Maria Henrique da Mota3, Ana Clara Bonini-Rocha1, Joseph McVeigh4, Wagner Rodrigues Martins5. 1. Universidade de Brasília (UnB), Curso de Fisioterapia, Brasília, DF, Brazil. 2. Universidade Estadual de Londrina (UEL), Laboratório de Biomecânica e Epidemiologia Clínica, Londrina, PR, Brazil. 3. Hospital Universitário de Brasília, Clínica de Reumatologia, Brasília, DF, Brazil. 4. Ulster University, School of Health Sciences, Centre for Health and Rehabilitation Technologies (CHaRT), Coleraine, Northern Ireland. 5. Universidade de Brasília (UnB), Curso de Fisioterapia, Brasília, DF, Brazil; Universidade de Brasília (UnB), Programa de Pós-Graduação em Ciências da Reabilitação, Brasília, DF, Brazil. Electronic address: wagnermartins@unb.br.
Abstract
OBJECTIVE: To determine the prevalence of Chronic Low Back Pain and predictors of Back Muscle Strength in patients with Systemic Lupus Erythematosus. METHODS: Cross-sectional study. Ninety-six ambulatory patients with lupus were selected by non-probability sampling and interviewed and tested during medical consultation. The outcomes measurements were: Point prevalence of chronic low back pain, Oswestry Disability Index, Tampa Scale of Kinesiophobia, Fatigue Severity Scale and maximal voluntary isometric contractions of handgrip and of the back muscles. Correlation coefficient and multiple linear regression were used in statistical analysis. RESULTS: Of the 96 individuals interviewed, 25 had chronic low back pain, indicating a point prevalence of 26% (92% women). The correlation between the Oswestry Index and maximal voluntary isometric contraction of the back muscles was r=-0.4, 95% CI [-0.68; -0.01] and between the maximal voluntary isometric contraction of handgrip and of the back muscles was r=0.72, 95% CI [0.51; 0.88]. The regression model presented the highest value of R2 being observed when maximal voluntary isometric contraction of the back muscles was tested with five independent variables (63%). In this model handgrip strength was the only predictive variable (β=0.61, p=0.001). CONCLUSIONS: The prevalence of chronic low back pain in individuals with systemic lupus erythematosus was 26%. The maximal voluntary isometric contraction of the back muscles was 63% predicted by five variables of interest, however, only the handgrip strength was a statistically significant predictive variable. The maximal voluntary isometric contraction of the back muscles presented a linear relation directly proportional to handgrip and inversely proportional to Oswestry Index i.e. stronger back muscles are associated with lower disability scores.
OBJECTIVE: To determine the prevalence of Chronic Low Back Pain and predictors of Back Muscle Strength in patients with Systemic Lupus Erythematosus. METHODS: Cross-sectional study. Ninety-six ambulatory patients with lupus were selected by non-probability sampling and interviewed and tested during medical consultation. The outcomes measurements were: Point prevalence of chronic low back pain, Oswestry Disability Index, Tampa Scale of Kinesiophobia, Fatigue Severity Scale and maximal voluntary isometric contractions of handgrip and of the back muscles. Correlation coefficient and multiple linear regression were used in statistical analysis. RESULTS: Of the 96 individuals interviewed, 25 had chronic low back pain, indicating a point prevalence of 26% (92% women). The correlation between the Oswestry Index and maximal voluntary isometric contraction of the back muscles was r=-0.4, 95% CI [-0.68; -0.01] and between the maximal voluntary isometric contraction of handgrip and of the back muscles was r=0.72, 95% CI [0.51; 0.88]. The regression model presented the highest value of R2 being observed when maximal voluntary isometric contraction of the back muscles was tested with five independent variables (63%). In this model handgrip strength was the only predictive variable (β=0.61, p=0.001). CONCLUSIONS: The prevalence of chronic low back pain in individuals with systemic lupus erythematosus was 26%. The maximal voluntary isometric contraction of the back muscles was 63% predicted by five variables of interest, however, only the handgrip strength was a statistically significant predictive variable. The maximal voluntary isometric contraction of the back muscles presented a linear relation directly proportional to handgrip and inversely proportional to Oswestry Index i.e. stronger back muscles are associated with lower disability scores.
Authors: Titilola Falasinnu; Thy Nguyen; Tiffany En Jiang; Yashaar Chaichian; Amadeia Rector; Beth D Darnall; Sean Mackey; Julia F Simard Journal: ACR Open Rheumatol Date: 2022-07-25