Table 4.

Demographic characteristics of patients with RA and non-RA controls.

Variable	RA				p-value
	No		Yes
	n = 121833		n = 30487
	n	%	n	%
Gender a					0.94
Female	93307	76.59	23343	76.57
Male	28526	23.41	7144	23.43
Age at baseline, years a					0.81
<25	5997	4.92	1528	5.01
25–50	43520	35.72	10880	35.69
>50	72316	59.36	18079	59.30
Mean (SD)b	52.72 (15.67)		52.78 (15.67)		0.55
Comorbidities a
Hypertension	39095	32.09	10107	33.15	<0.01
Dyslipidemia	26355	21.63	5755	18.88	<0.01
COPD	12375	10.16	4548	14.92	<0.01
Diabetes mellitus	18175	14.92	4415	14.48	0.05
Asthma	8576	7.04	3270	10.73	<0.01
Chronic kidney disease	1804	1.48	624	2.05	<0.01
Cerebrovascular disease	12466	10.23	2900	9.51	<0.01
Alcohol use disorder	235	0.19	92	0.30	<0.01
Liver cirrhosis	16784	13.78	6150	20.17	<0.01
Malignancies	28547	23.43	8567	28.10	<0.01
Coronary artery disease	12600	10.34	3567	11.70	<0.01
Follow-up period, years, median c	6.51		6.02		<0.01

^aχ² test; ^bt-test; ^cWilcoxon’s rank-sum test. RA: rheumatoid arthritis; SD: standard deviation; COPD: chronic obstructive pulmonary disease.