Table 3.

Odds ratio^a of death for horses fulfilling the systemic inflammatory response syndrome (SIRS) criteria on admission

Diagnostic Category	SIRS Status	Total (n)	Case Fatality Rate (%)	OR	95% CI	P Value
All emergency admissions	SIRS	121	38.8	8.22	4.55–14.88	<.001
	Non‐SIRS	265	7.2
Gastrointestinal	SIRS	76	49	21.11	9.12–48.86	<.001
	Non‐SIRS	186	4.3
Colics	SIRS	49	39	19.00	6.58–54.87	<.001
	Non‐SIRS	155	3.2
Surgical colics—All	SIRS	30	63	6.91	2.02–23.63	.002
	Non‐SIRS	25	20
Surgical colics (w/o ruptured)b	SIRS	25	56	5.09	1.45–17.93	.019
	Non‐SIRS	25	20
Colitis	SIRS	17	82	25.67	3.63–181.5	.001
	Non‐SIRS	13	15
Other gastrointestinal	SIRS	10	40	11.33	1.05–122.6	.041
	Non‐SIRS	18	6
Musculoskeletal and skin	SIRS	16	19	2.08	0.44–9.88	.39
	Non‐SIRS	50	10
Other systems	SIRS	29	24	1.22	0.35–4.20	1.00
	Non‐SIRS	29	21

^aFisher's exact test.

^bSurgical colics, excluding 5 cases that had a ruptured stomach, colon, or cecum upon arrival, diagnosed during surgery or necropsy.