Journal Article
Observational Study
Research Support, Non-U.S. Gov't
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Lower Socioeconomic Status is Associated With Decreased Therapeutic Response to the Biologic Agents in Psoriasis Patients.

BACKGROUND: Lower socioeconomic status is associated with poorer overall health outcomes. However, few studies have examined the impact of socioeconomic status on psoriasis.

OBJECTIVE: To examine the impact of individual socioeconomic status on systemic therapeutic outcomes amongst psoriasis patients.

METHODS: The study analyzed 156 psoriasis patients treated at the Tufts Medical Center Department of Dermatology from 2008-2014. Individual socioeconomic status was inferred from neighborhood income, defined as the percentage of households with income below the federal poverty line (% below FPL) in the patient's census tract. The following outcomes were compared between socioeconomic groups: improvement in simple measure for assessing psoriasis activity (S-MAPA) score at 12 weeks, primary and secondary drug failure rates, and incidence of documented medication non-adherence.

RESULTS: Those patients living in relatively poorer neighborhoods (% below FPL ≤ 10%) experienced a significantly decreased improvement in S-MAPA score at 12 weeks of biologic treatment when compared to those in relatively richer neighborhoods (% below FPL >10%), 23.2% vs. 45.5%, P=0.021. Patients living in poorer neighborhoods also had a significantly higher rate of primary drug failure when treated with biologics (34.7% vs. 18.4%, P=0.039) and were significantly more likely to have ≥ 1 documented instance of medication non-adherence when treated with biologics (45.5% vs. 8.8%, P < 0.001).

LIMITATIONS: Retrospective design, small sample size

CONCLUSIONS: Our study offers preliminary data that suggests lower socioeconomic status may be associated with decreased clinical response to the biologic agents, presumably through decreased medication adherence.

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