Patients with < 4 years of disease showed a significantly better improvement than longer diseased patients in BASDAI ( 3.2 ( 95 % confidence interval ( CI ) : 2.7 to 3.7 ) vs. 1.7 ( 1.1 to 2.2 ) ) , BASFI , BASMI and ASDAS ( 1.6 ( 1.4 to 1.8 ) vs. 0.9 ( 0.7 to 1.1 ) ) .