表 1.

50例患者人口学特征及临床特点

Demographics of 50 patients recruited into the study

Items	Value
*, data were missing in 2 patients; #, data were missing in 10 patients. RA, rheumatoid arthritis. Data are presented as n (%), x±s, or median (minimum-maximum).
Male/Female*	20 (42%)/28 (58%)
Age of presentation/years*	56 (14-73)
Age of RA onset/years	45±13
Age of lymphedema onset/years	53.0±11.6
Duration before lymphedema/year*	5 (0-32)
≤1 year	10 (21%)
≥2 years	38 (79%)
Site of lymphedema
Upper limbs	37 (74%)
Bilateral	19 (38%)
Unilateral	18 (36%)
Lower limbs	12 (24%)
Bilateral	9 (18%)
Unilateral	3 (6%)
Upper and lower limbs	1 (2%)
Rheumatoid factor (n=48)*
Positive	31 (65%)
Negative	17 (35%)
Activity of RA#
Active	20 (50%)
Quiescent	20 (50%)