| 1 | Conservative (minimum number of alerts) | No alerts for a movement into a lower risk level. Blocking: assuming no increases to a higher risk level, no alerts after the initial alert for high risk as long as the patients remain in same risk level. No alerts for low and medium risk levels. No blocking in critical risk level.
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| 2 | Intermediate (intermediate number of alerts) | No alerts for a movement into a lower risk level. Blocking: (i) no alerts after the initial alert for high risk level as long as the patients remain in the same risk level; (ii) no alerts after the initial alert for medium risk level as long as the patient remains in medium risk with delta <4 or moves between low risk with CEWS 6–9 and delta<4 and medium risk levels. No blocking in critical risk level.
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| 3 | Liberal (maximum number of alerts) | No alerts for a movement into a lower risk level. Blocking: (i) no alerts after the initial alert for high risk levels as long as the patients remain in the same risk level; (ii) no alerts after the initial alert for medium risk level as long as the patient remains in medium risk with delta <4 or moves between low risk with CEWS 6–9 and delta <4 and medium risk levels, (iii) no alerts after the initial alert for low risk as long as the patient remains in low risk level. No blocking in critical risk level.
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