Table 3

Discriminant ability of the ASAS Health Index (ASAS HI) with respect to disease activity and physical functioning

Disease activityF testP values
ASDAS thresholdsInactive (n=245)Moderate (n=283)High (n=500)Very high (n=289)
ASAS HI2.9 (3.1)5.1 (3.5)7.3 (3.6)10.4 (3.5)230.<0.001
BASDAI thresholds<2.0 (n=372)2.0–3.9 (n=405)4.0–5.9 (n=347)≥6.0 (n=414)
ASAS HI2.8 (2.9)5.2 (3.1)7.8 (3.3)10.5 (3.4)421.4<0.001