Risk Factors		Seronegative (n=76)	Seropositive (n=37)
Age		54,8 (±12,3)	57,6 (±10,3)
Genetic	Sex (% female)	50 (66%)	23 (62%)
	Family history	11 (14%)	3 (8%)
Environmental	Smoking	20 (26%)	8 (22%)
	BMI >25kg/m2	37 (49%)	14 (38%)
	Low education	20 (29%)	16 (49%)
Unclassified Arthritis	SJC28	0 (0–2)	0 (0–2)
	TJC28	0 (0–2)	0 (0–3)
	Patient Global	8,9 (±16,8)	5,1 (±10,7)
	HAQ	0,07 (±0,17)	0,05 (±0,15)
	hsCRP	0,29 (±0,46)	0,21 (±0,27)