Table 5. CT heart size parameters of neutered and non-neutered cats (mean ± SD and range).

Neuter status		Parameters
		TH (cm)	TW (cm)	Heart area (cm2)	Thoracic area (cm2)	Height of vertebral body (cm)	Heart height (cm)	Heart width (cm)	THW	RHA	tVHS	ctVHS
Male (n = 8)	Intact (n = 4)	3.53 ± 0.29	3.91 ± 0.33	5.79 ± 0.85	13.13 ± 1.99	0.48 ± 0.05	2.65 ± 0.30	2.84 ± 0.08	0.90 ± 0.08	0.45 ± 0.07	11.42 ± 1.28	7.45 ± 0.50
		(3.20–3.85)	(3.47–4.29)	(5.14–6.98)	(10.14–14.26)	(0.44–0.55)	(2.38–3.00)	(2.78–2.97)	(0.79–0.98)	(0.36–0.51)	(10.07–12.63)	(7.00–8.00)
	Castrated (n = 4)	4.13 ± 0.37	4.70 ± 0.22	6.69 ± 0.87	18.38 ± 1.52	0.58 ± 0.02	2.66 ± 0.30	3.10 ± 0.23	0.90 ± 0.08	0.36 ± 0.01	9.81 ± 1.36	7.45± 0.50
		(3.81–4.55)	(4.49–4.94)	(5.86–7.61)	(15.61–19.80)	(0.55–0.60)	(2.67–3.06)	(2.91–3.36)	(0.81–0.97)	(0.35–0.39)	(8.20–11.24)	(7.00–8.00)
	p-value	0.0362*	0.0177*	0.2315	0.0129*	0.0057**	0.2629	0.1088	0.6981	0.0997	0.9822	0.9672
Female (n = 16)	Intact (n = 7)	3.15 ± 0.40	3.76 ± 0.30	4.54 ± 1.01	11.14 ± 2.23	0.45 ± 0.04	2.27 ± 0.30	2.60 ± 0.33	0.84 ± 0.05	0.41 ± 0.04	10.73 ± 1.04	7.39 ± 0.45
		(2.72–3.68)	(3.08–4.28)	(3.48–6.00)	(8.14–14.14)	(0.40–0.51)	(1.87–2.65)	(2.21–3.00)	(0.76–0.90)	(0.32–0.46)	(9.50–12.28)	(6.90–8.00)
	Spayed (n = 9)	3.62 ± 0.37	4.07 ± 0.30	4.81 ± 1.04	14.29 ± 1.74	0.50 ± 0.02	2.47 ± 0.26	2.63 ± 0.35	0.90 ± 0.12	0.33 ± 0.05	10.35 ± 1.34	7.22 ± 0.50
		(2.94–4.17)	(3.65–4.68)	(3.00–6.71)	(11.23–16.70)	(0.46–0.55)	(1.97–2.78)	(2.10–3.32)	(0.75–1.14)	(0.26–0.41)	(7.56–12.37)	(6.90–8.00)
	p-value	0.0260*	0.1256	0.6143	0.0067**	0.0275*	0.1815	0.8449	0.2576	0.0166*	0.5430	0.5100

^*p < 0.05.

^**p < 0.01.

Statistical difference between groups of each parameters was made using unpaired t-test.