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Comparison of Remission and Lupus Low Disease Activity State in Damage Prevention in a United States Systemic Lupus Erythematosus Cohort.

ABSTRACT: OBJECTIVE:One objective in the treatment of systemic lupus erythematosus (SLE) disease activity is to reduce long-term rates of organ damage. We undertook this study to analyze data from a large clinical SLE cohort to compare patients achieving different levels of disease activity with respect to rates of long-term damage. METHODS:We analyzed data from 1,356 SLE patients in the Hopkins Lupus Cohort, followed up quarterly, with 77,105 person-months observed from 1987 to 2016. Three outcome measures were considered: clinical remission with no treatment, clinical remission on treatment, and lupus low disease activity state (LLDAS). RESULTS:Patients achieved LLDAS in 50% of their follow-up months. They achieved clinical remission with no treatment or clinical remission on treatment in only 13% and 27%, respectively, of their follow-up visits. The rates of damage consistently declined with increased percentage of prior time in either LLDAS or clinical remission on treatment. Spending a short proportion of prior time (<25%) in clinical remission on treatment was associated with a relatively low rate of damage compared to never achieving that condition (1.01 events per 10 person-years versus 1.82 events per 10 person-years; rate ratio 0.54, P < 0.0001). Those patients who experienced LLDAS at least 50% of the time had relatively low rates of damage (rate ratio 0.39-0.47, P < 0.0001). CONCLUSION:LLDAS is an easier target to achieve than clinical remission on treatment and results in reduced risk of long-term damage. However, even a small percentage of time in clinical remission on treatment was associated with reduced damage.

SUBMITTER: Petri M

PROVIDER: S-EPMC6203602 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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Comparison of Remission and Lupus Low Disease Activity State in Damage Prevention in a United States Systemic Lupus Erythematosus Cohort.

Petri Michelle M Magder Laurence S LS

Arthritis & rheumatology (Hoboken, N.J.) 20181101 11

<h4>Objective</h4>One objective in the treatment of systemic lupus erythematosus (SLE) disease activity is to reduce long-term rates of organ damage. We undertook this study to analyze data from a large clinical SLE cohort to compare patients achieving different levels of disease activity with respect to rates of long-term damage.<h4>Methods</h4>We analyzed data from 1,356 SLE patients in the Hopkins Lupus Cohort, followed up quarterly, with 77,105 person-months observed from 1987 to 2016. Three ...[more]

PMID: 29806142

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Project description:ObjectiveTo determine the independent impact of different definitions of remission and low disease activity (LDA) on damage accrual.MethodsPatients with ≥2 annual assessments from a longitudinal multinational inception lupus cohort were studied. Five mutually exclusive disease activity states were defined: remission off-treatment: clinical Systemic Lupus Erythematosus Disease Activity Index (cSLEDAI)-2K=0, without prednisone or immunosuppressants; remission on-treatment: cSLEDAI-2K score=0, prednisone ≤5 mg/day and/or maintenance immunosuppressants; low disease activity Toronto cohort (LDA-TC): cSLEDAI-2K score of ≤2, without prednisone or immunosuppressants; modified lupus low disease activity (mLLDAS): Systemic Lupus Erythematosus Disease Activity Index-2K score of 4 with no activity in major organ/systems, no new disease activity, prednisone ≤7.5 mg/day and/or maintenance immunosuppressants; active: all remaining visits. Only the most stringent definition was used per visit. Antimalarials were allowed in all. The proportion of time that patients were in a specific state at each visit since cohort entry was determined. Damage accrual was ascertained with the Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index (SDI). Univariable and multivariable generalised estimated equation negative binomial regression models were used. Time-dependent covariates were determined at the same annual visit as the disease activity state but the SDI at the subsequent visit.ResultsThere were 1652 patients, 1464 (88.6%) female, mean age at diagnosis 34.2 (SD 13.4) years and mean follow-up time of 7.7 (SD 4.8) years. Being in remission off-treatment, remission on-treatment, LDA-TC and mLLDAS (per 25% increase) were each associated with a lower probability of damage accrual (remission off-treatment: incidence rate ratio (IRR)=0.75, 95% CI 0.70 to 0.81; remission on-treatment: IRR=0.68, 95% CI 0.62 to 0.75; LDA: IRR=0.79, 95% CI 0.68 to 0.92; and mLLDAS: IRR=0.76, 95% CI 0.65 to 0.89)).ConclusionsRemission on-treatment and off-treatment, LDA-TC and mLLDAS were associated with less damage accrual, even adjusting for possible confounders and effect modifiers.

Project description:ObjectiveTo estimate the economic burden of systematic lupus erythematous (SLE), stratified by disease severity, in commercially- and Medicaid-insured US populations.MethodsAdults (≥18 years) with SLE treated with antimalarials, selected biologics, immunosuppressants, and systemic glucocorticoids (2010-2014) were identified within the commercial and Medicaid insurance IBM MarketScan® databases (index date = first SLE medication claim). Both cohorts were stratified into mild (receiving antimalarial or glucocorticoid monotherapy ≤5 mg/day) versus moderate/severe SLE (receiving glucocorticoids >5 mg/day, biologic, immunosuppressant, or combination therapy) during a 6-month exposure period. All-cause healthcare utilization and costs were evaluated during the 12 months following the exposure period.ResultsAmong 8231 commercially-insured patients, 32.6% had mild and 67.4% had moderate/severe SLE by our definition. Among 802 Medicaid-insured patients, 25.2% had mild and 74.8% had moderate/severe SLE. Adjusted mean total healthcare costs, excluding pharmacy, for moderate/severe SLE patients were higher than for mild SLE patients in the commercially-insured ($39,021 versus $23,519; p < 0.0001) and Medicaid-insured populations ($56,050 versus $44,932; p = 0.06). In both SLE severity populations total unadjusted costs were significantly higher among Medicaid-insured than commercially-insured patients.ConclusionCommercially-insured patients with treatment suggesting moderate/severe SLE incurred significantly higher adjusted mean healthcare costs, excluding pharmacy, compared with mild SLE patients. While not reaching statistical significance, moderate/severe Medicaid-insured patients had higher costs then mild SLE patients. Total unadjusted healthcare costs were significantly higher among Medicaid-insured than commercially-insured patients. These differential costs are important to consider and monitor when implementing interventions to improve health and reduce healthcare spending for SLE.

Dataset Information

Comparison of Remission and Lupus Low Disease Activity State in Damage Prevention in a United States Systemic Lupus Erythematosus Cohort.

Publications

Comparison of Remission and Lupus Low Disease Activity State in Damage Prevention in a United States Systemic Lupus Erythematosus Cohort.

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