Variables B S.E. Wald Df Sig. Exp(B) 95,0% C.I.for EXP(B) Lower Upper Lower Upper Lower Upper Lower Upper   Age ,019 ,040 ,212 1 ,645 1,019 ,941 1,102 SF-36 ,113 ,169 ,448 1 ,503 1,120 ,804 1,558 EQ-5D -,241 ,256 ,883 1 ,347 ,786 ,476 1,298 Weight -,063 ,273 ,053 1 ,817 ,939 ,549 1,604 Lenght ,133 ,257 ,269 1 ,604 1,143 ,691 1,890 BMI ,035 ,712 ,002 1 ,960 1,036 ,257 4,183 D.Age* -,038 ,037 1,049 1 ,306 ,963 ,895 1,035 EQ-5D Percentage† -,012 ,025 ,237 1 ,626 ,988 ,940 1,038 Constant -16,426 40,541 ,164 1 ,685 ,000

Table 3: The binary regresson model investigating the relationship between smoking with quality of life (SF-36, EQ-5D) and other variables in RA patients. *The age at onset of disease symptoms in patients. †The general health perspective percentage in EQ-5D patients.

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