表1.

ERA组和非ERA组临床资料比较

Clinical charasteristics of ERA and non-ERA patients

Items	ERA(n=236)	Non-ERA(n=89)	P
ERA, early rheumatoid arthritis; RF, rheumatoid factor; CCP, cyclic citrullinated peptide; ESR, erythrocyte sedimentation rate; CRP, C-reaction protein; IQR, interquartile range.
Male/female, n	60/176	38/51	0.002
Age/years, x±s	49.59±13.85	44.89±15.70	0.001
Disease duration/months, median (IQR)	5(2.25, 8.00)	3(1.00, 10.00)	0.068
Swollen joint count, median (IQR)	5(2, 10)	2(1, 4)	＜0.001
Tender joint count, median (IQR)	11(6, 20)	4(2, 10)	＜0.001
Morning stiffness(＞30 min), n(%)	151(63.98)	14(15.73)	＜0.001
RF positive, n(%)	162(68.64)	8(8.99)	＜0.001
Anti-CCP positive，n(%)	183(77.54)	6(6.74)	＜0.001
ESR/(mm/h), median (IQR)	41.50(24.00, 59.75)	27.00(14.00, 54.00)	0.008
CRP/(mg/L), median (IQR)	11.60(4.60, 36.38)	10.11(2.00, 46.48)	0.287