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Fig. 2 | BMC Rheumatology

Fig. 2

From: Healthcare resource utilization and costs associated with inflammatory bowel disease among patients with chronic inflammatory diseases: a retrospective cohort study

Fig. 2

Identification of the study population. RA, rheumatoid arthritis; PsA, psoriatic arthritis; PsO, psoriasis; AS, ankylosing spondylitis; IBD, inflammatory bowel disease. Notes: 1. Identified using the following ICD-9-CM and ICD-10-CM codes: RA (ICD-9-CM code 714.0; ICD-10-CM code: M05.1-M05.9, M06), PsA (ICD-9-CM code 696.0; ICD-10-CM code: L40.5x), PsO (ICD-9-CM code 696.1; ICD-10-CM code: L40.0-L40.4, L40.8, L40.9), or AS (ICD-9-CM code 720.0; ICD-10-CM code: M45.x)

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BMC Rheumatology

ISSN: 2520-1026

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