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Association of Poverty Income Ratio with Physical Functioning in a Cohort of Patients with Systemic Lupus Erythematosus
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July 01 2020
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Source: J Rheumatol. 47(7):983-990
[PDF-360.83 KB]
Details:
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Alternative Title:J Rheumatol
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Personal Author:
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Description:Objective:
To examine the association of income relative to the poverty threshold [poverty income ratio (PIR)] with self-reported physical functioning in a cohort of systemic lupus erythematosus patients.
Methods:
We used cross-sectional data on 744 participants from Georgians Organized Against Lupus (GOAL), and secondary analyses used data on 56 participants from a nested pilot study. Primary analyses utilized multivariable linear regression to estimate the association between PIR (categorized as <1.00, 1.00-1.99, 2.00-3.99, and ≥4.00; lower PIRs indicate higher poverty) and Physical Functioning (PF; scaled subscore from Short Form-12 survey; range, 0-100, higher scores indicate better functioning). Secondary analyses summarized complementary measures of physical functioning as means or percentages by PIR (categorized as <1.00, 1.00-1.99, and ≥2.00).
Results:
Overall, the mean age of participants was 48.0 years; 6.7% were male; 80.9% were black; and 37.5%, 21.0%, 29.6% and 12.0% had PIRs of <1.00, 1.00-1.99, 2.00-3.99, and ≥4.00, respectively. The overall mean PF score was 45.8 (36.2, 40.7, 55.5, and 61.2 for PIRs of <1.00, 1.00-1.99, 2.00-3.99, and ≥4.00, respectively). With adjustment, higher PIRs remained associated (β (95% CI)) with higher PF scores (2.00-3.99 vs. 1.00-1.99: 10.9 (3.3 to 18.6); ≥4.00 vs. 1.00-1.99: 16.2 (6.4 to 26.0)). In secondary analyses, higher PIR was also associated with higher scores for objective physical performance.
Conclusion:
Our results show that higher income relative to the poverty threshold is associated with better physical functioning across multiple domains, warranting further research into multi-component functional assessments to develop individual treatment plans and, potentially, improve socioeconomic disparities in outcomes.
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Source:
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Pubmed ID:32115428
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Pubmed Central ID:PMC7334069
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Funding:
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Volume:47
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Issue:7
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