Table 4

 Annual direct, indirect, and total costs per patient for the three chronic musculoskeletal conditions

FM (€/pt/year)CLBP (€/pt/year)AS (€/pt/year)Difference FM−CLBP (€/pt/year)*Difference FM−AS (€/pt/year)*Difference CLBP−AS (€/pt/year)*
Values are mean (median) [% of patients] or mean (95% confidence interval (CI)).
*95% CI if the mean difference was assessed by bootstrap.
AS, ankylosing spondylitis; CLBP, chronic low back pain; FM, fibromyalgia; pt, patient.
Direct medical costs1311 (673) [17%]1104 (594) [13%]1043 (691) [32%]207 (−226 to 645)268 (−132 to 663)61 (−273 to 412)
Direct non-medical costs3930 (2362) [50%]4491 (2502) [53%]1330 (1330) [41%]−561 (−2086 to 898)2600 (1476 to 3758)3161 (2943 to 4931)
Total direct costs5241 (3166) [67%]5594 (3770) [66%]2373 (2373) [74%]−353 (−2010 to 1277)2869 (1555 to 4237)3221 (1961 to 4640)
Productivity (friction) costs2573 (0) [33%]2939 (0) [34%]834 (0) [26%]−366 (−1802 to 1207)1739 (356 to 3039)2105 (843 to 3293)
Total costs7814 (5145) [100%]8533 (5068) [100%]3205 (1793) [100%]−719 (−3353 to 1624)4609 (2467 to 6662)5328 (3618 to 7253)