Skip to main content

Table 5 Results of the normalization process for three institutional studies

From: Leveraging the EHR4CR platform to support patient inclusion in academic studies: challenges and lessons learned

Outcomes

aXa

DERENEDIAB

EWING 2008

Total

Cases

Controls

ELIGIBILITY CRITERIA

 Criteria before normalization

20

12

20

15

67

 Complex criteria

15 (75%)

10 (83%)

15 (75%)

10 (67%)

50 (75%)

 Unchanged criteria

9 (45%)

8 (67%)

10 (50%)

9 (60%)

36 (54%)

 Criteria after normalization

20 (100%)

11 (92%)

20 (100%)

15 (100%)

66 (99%)

MEDICAL CONCEPTS

 Individual medical concepts identified in free-text eligibility criteria

45

16

39

14

114

 Medical concepts mapped to EHR4CR terminologiesa

30 (67%)

15 (94%)

38 (97%)

9 (64%)

92 (81%)

 Medical concepts mapped from EHR4CR terminologies to local terminologies

30 (67%)

15 (94%)

34 (87%)

7 (50%)

86 (75%)

 Free-text medical concepts present and structured in the local CDW/EHR

30 (67%)

16 (100%)

34 (87%)

9 (64%)

89 (78%)

 Free-text medical concepts present and unstructured in the local CDW/EHR

15 (33%)

0 (0%)

4 (10%)

4 (29%)

23 (20%)

 Free-text medical concepts missing in the local CDW/EHR

0 (0%)

0 (0%)

1 (3%)

1 (7%)

2 (2%)

FINAL COMPUTABLE CRITERIA

14

8

17

12

51

  1. a medical concepts that correspond to unstructured data in local CDW/EHR were not mapped to EHR4CR terminologies