frequency of sjogren 's syndrome was more in dr 2 positive patients ( 41.3 % ( 12/29 ) ) than in dr 2 negative ( 29.2 % ( 19/65 ) ) , and less in dr 4 positive ( 25.4 % ( 15/59 ) ) than in dr 4 negative ( 45.7 % ( 16/35 ) ) , so the complication of sjogren 's syndrome showed a trend against the severity of ra .
C1527336
sjogren 's syndrome
C0003873
ra