Table 3. Age distribution of cats presenting with HRI to veterinary practices participating in SAVSNET from 2013 to 2018, compared to the ages of cats from the overall SAVSNET population demographic and cats under primary-veterinary care in 2013 from the VetCompass programme.

Age	Number of HRI cases (n = 16)	Percentage of all HRI cases (%)	Percentage of SAVSNET demographic (%)	Percentage of VetCompass demographic (%)
<3 years	3	18.75	27.35	37.00
3–<6 years	2	12.5	16.5	20.97
6–<9 years	2	12.5	15.14	13.37
9–<12 years	2	12.5	13.95	9.48
12–<15 years	3	18.75	12.69	7.91
≥15 years	4	25.00	14.37	7.82*

Significant difference between HRI case population and SAVSNET or VetCompass demographic population indicated by * p < 0.05.