Table 1.

Descriptive characteristics of the study population

Mean (SD), unless specifiedImpaired WP (n=453)Full WP
(n=242)
p-valueTotal
(n=695)
Age (yrs)46.7 (11.1)42.8 (10.1)<0.00145.3 (10.9)
BMI28.5 (14.0)27.0 (6.8)0.14628.0 (12.0)
Male, n(%)246 (54)177 (73)<0.001423 (61)
Disease duration (yrs)12.7 (11.3)12.4 (10.2)0.81312.6 (11.0)
University-Education, n(%)104 (23.0)82 (33.9)0.001186 (26.8)
In a committed relation, n(%)310 (68.4)159 (65.7)0.464469 (6.6)
ASAS-HI8.0 (3.3)3.7 (3.0)<0.0016.5 (3.8)
BASDAI4.8 (1.9)2.1 (1.6)<0.0013.9 (2.2)
BASDAI > 4, n(%)286 (63.1)28 (11.6)<0.001314 (45.2)
Fatigue [BASDAI #1]5.8 (2.1)2.8 (2.1)<0.0014.7 (2.5)
Duration morning stiffness [BASDAI #6]3.5 (2.4)1.6 (1.8)<0.0012.8 (2.4)
BASFI4.2 (2.3)1.5 (1.5)<0.0013.3 (2.4)
Biologic treatment, n(%)230 (50.8)134 (55.4)0.390364 (52.4)
Full time employment, n(%)256 (56.5)202 (83.5)<0.001458 (65.9)
Absenteeism17.9 (32.1)0-10.6 (26.2)
Presenteeism48.6 (21.00)9.6 (8.3)-32.6 (25.6)
  • ASAS-HI, Assessment of SpondyloArthritis International Society-Health Index; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; BASFI, Bath Ankylosing Spondylitis Functional Index; BMI, basal metabolic index; n, number of pts; SD, standard deviation; WP, work productivity; years, yrs