Table 3.

Odds ratios per category APPS

Variable	Range	Category	N	Hospital mortality (%)	OR	OR 2.5 %	OR 97.5 %	P for trend
Age	<47	1	72	26.4	1			0.0046
	47–66	2	196	43.9	2.18	1.2	3.95
	>66	3	171	48	2.57	1.41	4.7
PaO2/FiO2	>158	1	239	36.4	1			0.0015
	105–158	2	135	46.7	1.53	1	2.35
	<105	3	65	56.9	2.31	1.32	4.03
P max	<27	1	233	34.8	1			0.0021
	27–30	2	48	25	0.63	0.31	1.27
	>33	3	134	52.2	2.05	1.33	3.17