A large observational cohort study of rheumatoid arthritis, IORRA: Providing context for today’s treatment options

Figures & data

Figure 1. Changes of drug use and disease activity of RA patients in the IORRA cohort from 2000 to 2018. Disease activity was categorized using the DAS28 score and standard methods. This figure is the updated version of previously published in Yamanaka et al. [6].

Table 1. J-HAQ score progression, odds ratio by logistic regression model, applied to patients meeting a variety of remission criteria over a period of 2.5 years.

N	Boolean trial	SDAI	Boolean practice	CDAI	DAS28
0	–	–	–	–	–
1	0.54 (0.33–0.87)	0.98 (0.54–1.81)	0.59 (0.36–0.97)	0.92 (0.51–1.64)	–
2	0.55 (0.33–0.92)	0.58 (0.32–1.06)	0.51 (0.31–0.86)	0.44 (0.24–0.80)	0.58 (0.28–1.17)
3	0.48 (0.28–0.82)	0.39 (0.21–0.73)	0.50 (0.29–0.86)	0.42 (0.24–0.75)	0.48 (0.26–0.91)
4	0.29 (0.16–0.51)	0.56 (0.31–1.01)	0.40 (0.23–0.70)	0.50 (0.28–0.90)	0.46 (0.25–0.85)
5	0.24 (0.13–0.47)	0.36 (0.20–0.68)	0.29 (0.16–0.54)	0.38 (0.21–0.70)	0.23 (0.12–0.44)
6	0.07 (0.03–0.15)	0.10 (0.05–0.20)	0.07 (0.03–0.14)	0.07 (0.04–0.15)	0.15 (0.08–0.29)

J-HAQ: Japanese version of the Health Assessment Questionnaire; N: number of data collections in which patients achieved remission criteria; SDAI: simplified disease activity index; CDAI: clinical disease activity index; DAS28: 28-joint disease activity score

Values are OR (95% CI).

Figure 2. The semiannual number of surgeries per 1000 outpatients with rheumatoid arthritis (RA) in a single institute-based large observational cohort (IORRA) study.

Yamanaka H, Seto Y, Tanaka E, Furuya T, Nakajima A, Ikari K, et al. Management of rheumatoid arthritis: the 2012 perspective. Mod Rheumatol. 2013;23(1):1–7.

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