Number of triggers: total	Number of triggers: cases	Number of triggers: controls	% of triggers modified : total	% of triggers modified: cases	% of triggers modified : controls
SpO2 90–94	518	373	145	44.9	45.5	43.4
Pulse rate 100–120 beats per min	460	375	85	37.2	34.6	48.2
Respiratory rate 21–25 breaths per min	352	272	80	28.4	27.6	31.2
Systolic blood pressure 90–100 mmHg	226	159	67	33.6	27	49.2
Pain score 5–7	162	89	73	1.2	0	2.7
Respiratory rate 26–30 breaths per min	133	121	12	48.9	46.3	75
Pulse rate 120–140 beats per min	132	130	2	29.6	29.2	50
Systolic blood pressure <90 mmHg	120	111	9	28.3	26.1	55.5
Pulse rate 50–60 beats per min	101	37	64	22.8	24.3	21.8
SpO2 < 90	98	89	9	34.7	32.6	55.5
Oxygen flow = 6 L per min	98	92	6	4.1	4.4	0
Oxygen flow >6L per min	95	88	7	21.1	21.6	14.2
Systolic blood pressure 170–180 mmHg	92	60	32	15.2	15	15.6
Respiratory rate >30 breaths per min	79	79	0	38	38	0
Systolic blood pressure 180–200 mmHg	78	59	19	12.8	13.5	10.5
Temperature 38.1–38.5	72	53	19	11.1	9.4	15.7
Temperature >38.5	59	47	12	28.8	27.6	33.3
Sedation score = 2	58	52	6	1.7	1.9	0
Pain score 8–10	45	29	16	0	0	0
Pulse rate >140 beats per min	37	37	0	8.1	8.1	0
Temperature 35.1–35.5	35	28	7	2.9	3.5	0
Systolic blood pressure >200 mmHg	30	29	1	6.7	6.9	0
Temperature <35	21	21	0	42.8	42.8	0
Respiratory rate <8 breaths per min	10	1	9	40	0	44.4
Respiratory 8–10 breaths per min	6	4	2	0	0	0
Pulse rate 40–50 beats per min	3	2	1	0	0	0
Sedation score = 3	3	3	0	0	0	0
Pulse rate <40 beats per min	0	0	0	0	0	0
Bleeding	1	1	0	0	0	0
Seizure	1	1	0	0	0	0

Listed in order of descending frequency of trigger over both groups. Colour indicates tier of the individual trigger (yellow being a nurse, orange being an MDT, and red being an RRT trigger).

RRT, rapid response team; MDT, multidisciplinary team; SpO₂, oxygen saturation.