Table 2

Characteristics of disease activity, physical function and quality of life

CharacteristicsPatients with axSpA (n=100)nraxSpA (n=44)AS (n=56)p Value
Global pain*4.4±2.54.0±2.14.7±2.70.2
BASDAI, total3.9±2.03.6±1.74.2±2.20.2
BASDAI <4 (n=51)2.4±1.02.4±0.92.3±1.00.5
BASDAI ≥4 (n=49)5.6±1.35.1±1.05.9±1.40.05
ASDAS total2.6±0.92.2±0.82.9±0.90.001
ASDAS <2.1 (n=32)1.5±0.41.5±0.41.5±0.40.9
ASDAS ≥2.1 (n=68)3.1±0.62.9±0.53.2±0.70.03
Patient's global assessment4.3±2.74.0±2.74.6±2.70.3
Physician's global assessment3.2±1.92.7±1.73.5±1.90.06
SF-36 mental component summary score46.4±11.945.0±12.347.5±11.50.4
SF-36 physical component summary score37.6±9.839.0±9.036.5±10.20.2
CRP, mean±SD mg/l9.0±10.75.7±6.511.6±12.6<0.001
CRP, BASDAI <48.9±9.95.9±6.511.7±11.70.04
CRP, BASDAI ≥49.1±11.75.4±6.811.6±13.60.005
CRP, ASDAS, <2.13.4±3.52.3±2.25.2±4.50.04
CRP, ASDAS, ≥2.111.7±12.08.6±7.613.4±13.60.07
  • * Numerical rating scales (NRS) for global pain on a 0–10 NRS.

  • Visual analogue scale for physician and patient's global assessment of disease activity: 0–10 cm.

  • SF-36 norms for the German population are available.11

  • ASDAS, Ankylosing Spondylitis Disease Activity Score; ASQoL, Ankylosing Spondylitis Quality of Life; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; BASFI, Bath AS Functional Index; CRP, C-reactive protein; nraxSpA, non-radiographic axial spondyloarthritis; SF-36, Short Form-36 Health Survey.