Table 1.

Unadjusted mortality and odds ratios (OR) for death by presence and duration of a medical emergency team (MET)

Patient deaths and odds ratios for death by MET implementation year
MET Duration	Alive number (%)	Died number (%)	Total, number of patients	OR for death (95% CI)
Nil	2,363,881 (98.6)	33,425 (1.4)	2,397,306	Base
0 to 2 yrs	781,399 (98.8)	9,271 (1.2)	680,836	0.84 (0.82, 0.86)
3 to 4 yrs	898,356 (98.9)	10,250 (1.1)	908,606	0.81 (0.79, 0.83)
> 4 yrs	1,794,298(98.9)	20,653 (1.1)	1,814,951	0.81 (0.80, 0.83)
Total	5,837,934 (98.8)	73,599 (1.3)	5,911,533