Table 1.

Association between age, gender, education and GDP with DAS28

R²=0.14, n=3580	B [95% CI]

Age, years	0.00 [0.00; 0.01]
Gender (female vs male)	0.35^* [0.23; 0.48]
Primary education vs. University	0.42^* [0.28; 0.55]
Secondary education vs. University	0.14^* [0.02; 0.27]
High RF or ACPA	0.25^* [0.16; 0.35]
Comorbidity index (Wolfe-Michaud index)	0.13^* [0.09; 0.16]
Low GDP vs. High GDP	1.20^* [1.07; 1.33]
Medium GDP vs. High GDP	0.22^* [0.11; 0.34]