Secondary Outcome(s)
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Number of patients who achieve the first low disease activity score (LDAS), DAS28 = 3.2
[Time Frame: Up to 12 months]
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Existence or the absence of radiographic erosions as determined by the investigator by imaging technique
[Time Frame: At baseline]
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Number of Adverse Events (AE)
[Time Frame: Up to 12 months]
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Number of patients who achieve the first clinically significant Disease Activity Score (DAS)-change (= 1.2)
[Time Frame: Up to 12 months]
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Reason for abatacept treatment initiation as determined by the investigator
[Time Frame: At baseline]
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Simplified Disease Activity Score (based on 28 joints) (DAS28)
[Time Frame: Up to 12 months]
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Clinical disease activity index (CDAI)
[Time Frame: Up to 12 months]
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Dosage of abatacept as determined by the investigator
[Time Frame: Up to 12 months]
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Patient global assessment (PGA)
[Time Frame: Up to 12 months]
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Rheumatoid factor (RF)
[Time Frame: Up to 12 months]
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Number of patients who achieve the first remission state, DAS28 < 2.6
[Time Frame: Up to 12 months]
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Number of Serious Adverse Events (SAE)
[Time Frame: Up to 12 months]
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Frequency of administration of abatacept
[Time Frame: Up to 12 months]
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Health Assessment Questionnaire Disability Index (HAQ-DI)
[Time Frame: Up to 12 months]
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Number of patients with other pathologies (cardiovascular, respiratory, liver, renal, cancer, infections, and immuno-deficiency)
[Time Frame: Up to 12 months]
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Anti-citrullinated protein antibody (ACPA) titer
[Time Frame: At baseline]
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Number of patients who achieve the first response to treatment per European League Against Rheumatism (EULAR) response criteria
[Time Frame: Up to 12 months]
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Simple disease activity index (SDAI)
[Time Frame: Up to 12 months]
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Concomitant treatment given with abatacept as determined by the investigator
[Time Frame: Up to 12 months]
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Disease history of participants as determined by the investigator
[Time Frame: At baseline]
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Evaluator global assessment (EGA)
[Time Frame: Up to 12 months]
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Existence or the absence of radiographic erosions as determined by the investigator by imaging technique
[Time Frame: Up to 12 months]
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Number of patients previously receiving disease modifying anti-rheumatic drug (DMARD)
[Time Frame: Up to 12 months]
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Number of patients with cardiovascular risk factors (smoker, hypertension, diabetes, dyslipidemia)
[Time Frame: Up to 12 months]
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Socio-demographics of participants as determined by the investigator
[Time Frame: At baseline]
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