Table 3.

Alerts issued and subsequent health service use (N=116).

Alerts and health service usea	Patients who submitted readings (n=71)	Patients who did not submit readings (n=45)
Total amber alerts, n	70	N/Ab
Total red alerts, n	82	N/A
Patients who received at least one amber alert but no red alerts, n (%)	7 (10)	N/A
Patients who received at least one red alert, n (%)	28 (39)	N/A
Patients who phoned 111 (out-of-hours primary care), n (%)	18 (25)	11 (24)
Patients who contacted a COVID-19 assessment center, n (%)	8 (11)	4 (9)
Patients who attended the emergency department, n (%)	17 (24)	10 (22)
Patients admitted to hospital, n (%)	14 (20)	7 (16)
Length of hospital stay (days), mean (SD)	3.6 (4.5)	4.0 (4.2)
Deaths, n (%)	0 (0)	1 (2)

^aA single episode could generate several alerts and several contacts; for example, a patient with breathlessness could also generate alerts for low oxygen saturation, high pulse, and high temperature. The patient could contact NHS (National Health Service) 24, be directed to the COVID-19 assessment center, and then be directed for assessment in the emergency department before admission to hospital. Some patients were admitted directly to hospital via ambulance, while most passed through the emergency department.

^bN/A: not applicable; patients who did not submit readings did not receive any alerts.