Table 1 Demographic data and comorbidity comparison of the study subjects.
Variables | Non-RA cohort | RA cohort | P |
|---|---|---|---|
N = 15456(%) | N = 8331(%) | ||
Age, (years) | Â | Â | 0.62 |
< = 40 | 2587(16.7) | 1359(16.3) |  |
41–60 | 7441(48.1) | 4004(48.1) |  |
60+ | 5428(35.1) | 2968(35.6) | Â |
Mean (Standard Deviation, SD) | 54.38(14.0) | 54.60(14.0) | 0.24 |
Gender | Â | Â | 0.12 |
Female | 10334(66.9) | 5652(67.8) | Â |
Male | 5122(33.1) | 2679(32.2) | Â |
Monthly income | Â | Â | 0.45 |
Low | 6673(43.2) | 3592(43.1) | Â |
Median | 7942(51.4) | 4253(51.1) | Â |
High | 841(5.4) | 486(5.8) | Â |
Level of urbanization | Â | Â | <0.001 |
Urban | 8369(54.1) | 4435(53.2) | Â |
Suburban | 2652(17.2) | 1241(14.9) | Â |
Rural | 4435(28.7) | 2655(31.9) | Â |
Comorbidity | Â | Â | Â |
Hypertension | 3014(19.5) | 2426(29.1) | <0.001 |
Stroke | 606(3.9) | 425(5.1) | <0.001 |
Diabetes | 1412(9.1) | 1162(13.9) | <0.001 |
Heart disease | 1437(9.3) | 1335(16.0) | <0.001 |
Chronic kidney disease | 181(1.2) | 160(1.9) | <0.001 |
Cancer | 473(3.1) | 269(3.2) | 0.48 |
Alcohol dependence syndrome | 7(0.0) | 15(0.2) | 0.001 |
Tobacco use | 22(0.1) | 14(0.2) | 0.63 |
