Table 4.

The predictive value of a range of baseline characteristics for the development of persistent RA in patients with very early inflammatory arthritis. Results of binary logistic regression analysis.

	RA Persistent,	Other,	Univariate Analysis	Binary Logistic Regression Analysis
	n = 19	n = 77	p	OR (95% CI)*	p
Age, yrs, median (IQR)	67 (59–74)	41 (30–56)	< 0.001	1.08 (1.01–1.2)	0.02
Female, %	58	40	0.26	1.5 (0.3–8.7)	0.65
Symptom duration > 6 weeks, %	47	38	0.55	0.4 (0.05–3.4)	0.41
EMS ≥ 1 h, %	53	34	0.09	1.03 (0.1–7.4)	0.98
Arthritis of ≥ 3 joint areas, %	58	27	0.02	1.7 (0.2–12.2)	0.62
Arthritis of wrist or MCP or PIP joints, %	79	36	0.002	5.3 (0.7–42.1)	0.11
Symmetrical arthritis, %	37	21	0.27	10.2 (1.1–96.2)	0.04
Subcutaneous nodules, %	5	3	0.53	0.5 (0.01–24)	0.72
RF ELISA positive and anti-CCP ELISA positive, %	63	3	< 0.001	79.6 (7.5–849.9)	< 0.001

^*For age, the odds ratio is per year-increase in age. EMS: early morning stiffness. MCP: metacarpophalangeal. PIP: proximal interphalangeal.