A scattered landscape: assessment of the evidence base for 71 patient decision aids developed in a hospital setting

Table 1 Baseline characteristics of 71 PtDAs

	n	(%)
Types of treatments being compared
Surgeries compared to other non-drug interventions^a	19	27
Non-drug interventions/surgeries compared to each other	16	22
Drug treatments compared to each other	14	20
Drug treatments compared to non-drug interventions/surgeries	11	15
More than two different interventions types in comparison	11	15
Do-nothing alternative (DNA) included or not
Yes	8	11
No	50	70
Extended DNA^b included	13	18
Evidence base of comparisons
De-novo evidence review (evidence report)	48	68
Update evidence review plus guideline (update report)	11	15
Evidence & consensus-based German Clinical Practice Guideline	9	13
No reliable evidence available, lower level guideline or other kind of information was used	3	4

BSC, best supportive care; DNA, do-nothing-alternative; PtDA, Evidence-based Patient Decision Aid
^aIncludes 2 comparisons of surgery to a real do-nothing-alternative (DNA)
^bIncludes choice for best supportive care (BSC), palliative care, watchful waiting/active monitoring or stay on (drug) treatment as before

ISSN: 1472-6947