Screening breakdown
| PEWS | EWS | Structured handover | Situational awareness | Electronic systems | Observations and monitoring | Family involvement | Snowball sample | |
| Database searching | 3564 | 1155 | 3369 | 302 | – | – | – | – |
| Additional sources | 83 | 7 | 150 | 46 | – | – | – | – |
| Records after duplicates removed | 2194 | 751 | 2156 | 199 | – | – | – | – |
| Hand searches | 431 | – | – | – | 26 | 20 | 15 | 5 |
| Title screening | 90 | 751 | 2156 | 199 | 26 | 20 | 15 | 5 |
| Abstract screening | 62 | 106 | N/A | N/A | 26 | 20 | 15 | 5 |
| Full paper screening | 39 | 65 | 37 | 26 | 26 | 20 | 15 | 5 |
| Included in s yntheses | 24 | 22 | 4 | 6 | 10 | 2 | 9 | 5 |
EWS, early warning system; N/A, not applicable; PEWS, Paediatric Early Warning System.