Figures & data
Figure 1 Definition of observation periods.
Figure 2 Sample selection flowchart.
Notes: ICD-9 714 (Rheumatoid arthritis); ICD-9 720.0 (Ankylosing spondylitis); ICD-9 696.0 (Psoriatic arthritis); ICD-9 555 (Crohn’s disease); ICD-9 556 (Ulcerative colitis).
Abbreviation: ICD-9-CM, International Classification of Diseases, Ninth Revision, Clinical Modification.
Abbreviation: ICD-9-CM, International Classification of Diseases, Ninth Revision, Clinical Modification.
Table 1 Characteristics of patients in treatment with biologic drugs
Figure 3 Pharmaceutical cost stratified by ATC code.
Abbreviation: ATC, Anatomical Therapeutic Chemical
Table 2 Treatment cost per patient switching from the initial treatment and treatment cost per patient not switching from the initial treatment (cost per patient per year in euros)
Table 3 Linear regression analysis of the treatment costs