Quality of available evidence, broken down by review subquestion
| Review subquestion | High-quality papers (n=3) | Medium-quality papers (n=5) | Low-quality papers (n=6) |
| 1. Does ACP improve outcomes? (n=2) | Detering et al28 (n=1) | Bristowe et al29 (n=1) | (n=0) |
| 2. What are the views of patients, relatives and healthcare professionals regarding ACP? (n=8) | Peck et al33 (n=1) | Cheang et al,30 Schiff et al,31 Schiff et al32 (n=3) | Black,41 Black,34 Black and Emmet,35 Perez et al36 (n=4) |
| 3. Does ACP currently occur? (n=4) | Barnato et al,38 Detering et al28 (n=2) | Cheang et al,30 Scott et al37 (n=2) | (n=0) |
| 4. What are the facilitators and barriers to ACP? (n=11) | Barnato et al38 Detering et al,28 Peck et al33 (n=3) | Cheang et al,30 Scott et al37 (n=2) | Black,41 Black,34 Black and Emmet,35 Cantillo et al,39 Detering et al,40 Perez et al36 (n=6) |
ACP, advance care planning.