Table 5.

Comparison of mortality after discharge from intensive care for patients discharged on day of prediction of risk (group 0), patients who stayed additional 24 hours (group 1), patients who stayed additional 48 hours (group 2), and patients at no risk (group 3). Mortality is reduced by 39.3% if patients stay another two days. Figures are number (percentage) of patients

	Alive	Died	Total
Development dataset*
Group 0	326 (86)	53 (14)	379
Group 1	71 (93)	5 (7)	76
Group 2	52 (96)	2 (4)	54
Combined validation dataset†
Group 0	581 (72)	230 (28)	811
Group 1	126 (87)	19 (13)	145
Group 2	86 (83)	17 (17)	103
Group 3	776 (96)	34 (4)	810

^*P=0.077 for group 0 v group 1; P=0.034 for group 0 v group 2. ^†P=0.0001 for group 0 v group 1; P=0.011 for group 0 v group 2.