Table 1 Clinical and biological parameters of patients with rheumatoid arthritis in Syria and France .

	Healthy populations		p Values	Populations with RA		p Values
	Syria (n = 120)	France (n = 471)		Syria (n = 156)	France (n = 512)
Age, mean (SD), years	37.58 (12.53)	48.45 (5.16)	NS	44.02 (14.47)	57.56 (14.67)	NS
Sex, % women	49.2	24.8	0.04	80.1	74.8	NS
Disease duration, mean (SD), years	–	–		7.28 (4.87)	10.05 (8.66)	<0.001
Destruction positive, %	–	–		69.9	53.7	<0.001
Right Larsen wrist index, mean (SD)	–	–		2.33 (1.20)	1.99 (1.75)	<0.001
Rheumatoid factor positive, %	–	–		62.9	61.7	NS
Methotrexate treatment, %	–	–		74.0	94.2	NS

NS, not significant; RA, rheumatoid arthritis.