Table 1. Cause of death by organ system, based on necropsy findings, for all cats and for cats ≥ 1 year of age.

	All Cats					Cats ≥1 year
Organ system cause of death	Number	Percent	Number with Age	Median Age (Years)	IQR (Years)	Range (Years)	Number with Age	Median Age (Years)	IQR (Years)	Range (Years)
Cardiovascular	299	9.62	280	8.41	4.31–12.02	0.04–21.13	264	8.73	5.00–12.15	1.00–21.13
Dermatologic	76	2.45	73	10.39	6.26–13.55	.51–18.41	69	10.44	7.77–13.61	1.53–18.41
Endocrine	173	5.57	165	12.65	9.67–15.01	1.02–21.85	165	12.65	9.67–15.01	1.02–21.85
Gastrointestinal	312	10.04	298	10.51	7.03–13.66	0.08–21.24	277	10.85	7.96–13.83	1.11–21.24
Genital	22	0.71	21	9.55	4.96–12.45	0.24–19.87	20	9.93	5.48–12.74	1.05–19.87
Hematopoetic	105	3.38	104	7.04	2.52–11.07	0.22–19.90	91	8.39	4.00–11.22	1.05–19.91
Hepato-billiary	158	5.08	151	8.52	5.48–11.72	0.02–21.44	146	8.67	6.02–11.81	1.35–21.44
Musculoskeletal	119	3.83	114	8.69	4.79–12.11	0.01–19.39	101	9.07	6.80–12.50	1.08–19.39
Neurological	330	10.62	324	8.24	3.66–12.66	0.06–20.66	290	9.07	5.16–13.02	1.00–20.66
Ophthalmologic	6	0.19	6	11.45	9.32–16.17	0.26–18.07	5	11.76	11.13–16.18	9.32–18.07
Respiratory	355	11.42	343	9.87	5.71–13.13	0.01–21.12	317	10.32	6.77–13.33	1.11–20.12
Systemic	675	21.72	643	6.25	1.38–11.53	0.05–20.44	508	8.75	4.00–12.39	1.01–20.44