Table 3

 Baseline versus final values of major clinical measures

Patients fulfilling AS criteria (n = 21)USpA (n = 29)
BaselineFinalDifferencep ValueBaselineFinalDifferencep Value
*Student’s t test.
†p = 0.006, ankylosing spondylitis v undifferentiated spondyloarthritis at final evaluation.
‡p = 0.028, ankylosing spondylitis v undifferentiated spondyloarthritis at final evaluation.
AS, ankylosing spondylitis; BASDAI, Bath ankylosing spondylitis disease activity index; BASFI, Bath ankylosing spondylitis functional index; USpA, undifferentiated spondyloarthritis.
Joints involved (n)*†3.7 (3.4)1.2 (2.3)−2.50.0063.5 (2.7)2.0 (3.2)−1.50.038
Entheses involved (n)*2.5 (2.1)2.7 (3.1)0.10.822.7 (3.0)2.5 (3.6)−0.20.77
BASDAI*3.9 (2.9)4.5 (4.4)0.60.543.8 (2.3)3.4 (2.2)−0.30.58
BASFI*3.3 (2.6)3.3 (2.7)0.00.852.8 (2.1)2.6 (1.8)−0.90.08
Modified Schober’s test (cm)*4.3 (1.0)5.5 (1.6)1.20.0074.7 (1.3)5.5 (1.7)0.90.008
Chest expansion (cm)*4.1 (1.0)4.1 (1.5)0.00.893.9 (0.9)3.7 (1.1)−0.30.58
Occiput to wall distance (cm)*‡00.9 (0.3)0.90.16200.3 (0.7)0.30.058