Table 1

Demographic data and comorbidity comparison of the study subjects

Non-RA cohortRA cohort
VariablesN=32 600 (%)N=8045(%)p Value
Age (years)0.85
 ≤405378 (16.5)1331 (16.5)
 41–6015 569 (47.8)3814 (47.4)
 60+11 653 (35.7)2900 (36.0)
 Mean±SD55.00±14.6355.01±14.650.94
Gender0.95
 Female22 461 (68.9)5540 (68.9)
 Male10 139 (31.1)2505 (31.1)
Monthly income<0.001
 Low15 218 (46.7)3513 (43.7)
 Median15 985 (49.0)4213 (52.4)
 High1397 (4.3)319 (4.0)
Level of urbanisation<0.001
 Urban18 839 (57.8)4485 (55.7)
 Suburban5311 (16.3)1258 (15.6)
 Rural8450 (25.9)2302 (28.6)
Comorbidity
 Hypertension5965 (21.2)2216 (27.6)<0.001
 Diabetes2717 (9.6)1046 (13.0)<0.001
 Heart disease3054 (10.8)1273 (15.8)<0.001
 Chronic kidney disease264 (0.9)123 (1.5)<0.001
 Cancer959 (3.4)268 (3.3)0.75
 Alcohol dependence syndrome30 (0.1)18 (0.2)0.002
 Tobacco use36 (0.1)10 (0.1)0.74
Visits seeking medical care
 Mean±SD (median, 25th–75th centile)234.55±194.08 (185, 97–319)159.90±155.87 (114, 52–219)<0.001
  • RA, rheumatoid arthritis.