Identification and prediction of difficult-to-treat rheumatoid arthritis patients in structured and unstructured routine care data: results from a hackathon

Table 2 Classification of D2T and non-D2T patients in unstructured routine care data

Classification in unstructured data	Validation
Classification in unstructured data	Clinically classified D2T RA*	Clinically classified non-D2T RA*	Newly classified patients in the UPOD	Total
D2T RA	36	8	117	161
Non-D2T RA	16	92	1604	1712
Total	52	100	1721	1873

Patients were classified by applying the D2T RA definition [8] in unstructured routine care data from the UPOD
D2T difficult-to-treat, RA rheumatoid arthritis, UPOD Utrecht Patient Oriented Database
*Clinical classification of D2T and non-D2T RA patients as performed in the cross-sectional study [6]

ISSN: 1478-6362