(15.9 and 10.1% respectively, p = < 0.01), obesity (44.2 and 24.3% respectively, p < 0.01) hypertension (24.3 and 16.4% respectively, p < 0.01) and autoimmune rheumatic diseases (7.8 and 4.8% respectively, p = 0.03 (Rev Med Chile 2010; 138: 188-195).