A prediction rule for lack of achievement of inactive disease with methotrexate as the sole disease-modifying antirheumatic therapy in juvenile idiopathic arthritis

Table 3 Regression logistic model for the lack of achievement of ID

	β	OR (95% CI)	P^a	Score
Functional phenotype (reference phenotype: oligoarthritis)			< 0.0001
Polyarthritis	0.26	1.3 (0.8–2.1)		0.5
Enthesitis-related arthritis	1.37	3.9 (1.3–11.8)		1.5
Systemic arthritis	2.45	11.6 (3.7–36.0)		2.5
CRP > 1.4 mg/dl (reference category: ≤ 1.4 mg/dl)	0.60	1.8 (1.1–2.9)	0.014	0.5
Score range				0–3

ID inactive disease, OR Odds Ratio, 95% CI 95% Confidence Interval; ^aLikelihood Ratio Test; CRP C reactive protein
Complete data were available for 365 patients. This model was transformed, using the β regression coefficient, into a prediction score for the risk of lack of achievement of ID. The area under the curve (AUC) of the model was 0.67.

ISSN: 1546-0096