Table 4.

Odds ratios per category recalibrated APPS

Variable	Range	Category	N	Hospital mortality (%)	OR	OR 2.5 %	OR 97.5 %	P for trend
Age	<47	1	72	26.4	1			0.0021
	47–59	2	96	41.7	1.99	1.03	3.87
	>59	3	271	47.2	2.5	1.4	4.44
PaO2/FiO2	>158	1	239	36.4	1			0.0015
	105–158	2	135	46.7	1.53	1.00	2.35
	<105	3	65	56.9	2.31	1.32	4.03
P max	<30	1	281	33.1	1			0.0001
	30–33	2	40	45	1.65	0.85	3.23
	>33	3	94	55.3	2.5	1.55	4.03