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Retrospective Cohort Study
©The Author(s) 2025.
World J Clin Cases. Nov 26, 2025; 13(33): 110641
Published online Nov 26, 2025. doi: 10.12998/wjcc.v13.i33.110641
Table 1 Baseline characteristics before matching, n (%)/mean ± SD
Baseline characteristics
RA+DM (n = 60523)
RA-DM (n = 138848)
P value
Age 69.06 (11.56)68.25 (14.41)< 0.001
Gender
Female42031 (69.45)102277 (73.66)< 0.001
Race
White40840 (67.48)108904 (78.43)< 0.001
Black10059 (16.62)14765 (10.63)< 0.001
Hispanic6368 (10.52)9481 (6.83)< 0.001
Asian1375 (2.27)2718 (1.96)< 0.001
Native1196 (1.98)1999 (1.44)< 0.001
Other685 (1.13)990 (0.71)< 0.001
Comorbidities
Gastro-esophageal reflux disease21363 (35.3)46663 (33.61)< 0.001
Chronic obstructive pulmonary disease7849 (12.97)16699 (12.03)< 0.001
Asthma6271 (10.36)12672 (9.13)< 0.001
Smoking5780 (9.55)15831 (11.4)< 0.001
Heart failure29061 (48.02)38053 (27.4)< 0.001
Chronic kidney disease20373 (33.66)23650 (17.03)< 0.001
Atrial fibrillation9868 (16.3)19183 (13.81)< 0.001
Ventricular tachycardia1065 (1.76)1996 (1.44)< 0.001
Hypertension53568 (88.51)99210 (71.45)< 0.001
Obesity19604 (32.39)25059 (18.05)< 0.001
Alcohol use1132 (1.87)4936 (3.55)< 0.001
Steroids use5767 (9.53)15274 (11.0)< 0.001
Coronary artery disease21901 (36.19)31360 (22.58)< 0.001


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