Table 3

Adjusted OR with 95% CI for the association between variables and rheumatoid arthritis

VariableFemaleMaleTotal
Periodontitis1.16 (1.12 to 1.21)1.16 (1.08 to 1.25)1.16 (1.12 to 1.20)
Geographical region
 Northern1.00 (reference)1.00 (reference)1.00 (reference)
 Central1.06 (1.01 to 1.11)1.19 (1.08 to 1.31)1.09 (1.04 to 1.14)
 Southern0.98 (0.94 to 1.03)1.08 (0.99 to 1.17)1.00 (0.97 to 1.05)
 Eastern1.20 (1.10 to 1.31)1.17 (1.00 to 1.38)1.19 (1.12 to 1.20)
Diabetes mellitus0.88 (0.81 to 0.96)0.82 (0.71 to 0.95)0.87 (0.81 to 0.93)
Sjögren's syndrome6.53 (4.75 to 8.98)8.07(2.60 to 25.08)6.60 (4.86 to 8.97)
  • Matched variables include age group, sex and year of index date. Adjusted variables include geographical region and pre-existing diseases, including diabetes mellitus requiring antidiabetic drugs and Sjögren's syndrome with a certificate of catastrophic illness.