Table 2.

Dataset description for six selected tests

Time interval	N CD	N CD controls	N UC	N UC controls
−1	1186	1186	1818	1818
−2	470	470	703	703
−3	352	352	541	541
−4	251	251	373	373
−5	186	186	274	274
−6	126	126	196	196
−7	92	92	128	128
−8	35	35	82	82
−9	18	18	33	33

The six blood tests CRP, neutrophils, monocytes, platelets, hemoglobin, and eosinophils were evaluated further in prediction models. Cases who had all six measurements taken within the same time interval were selected and matched with controls. The resulting sample sizes in each time interval are shown in the table. Further, time interval −1 was split 80:20 in a training and validation dataset. All data in the earlier time intervals were used to evaluate the model trained on the −1 interval.