Trends in popularity of some morphological traits of purebred dogs in Australia

Table 2 Weighted linear regression model results for the trends in dog height and cephalic index of Australian National Kennel Council (ANKC) recognised breed

Outcome variable	Parameter	b	S.E.	95 % CI^a	t-value	P- value
Maximal Height	Intercept	50.62	0.48	(49.68, 51.56)	105.60	<0.001
Maximal Height	Year	−0.10	0.03	(−0.16, −0.04)	−3.34	<0.001
Minimal Height	Intercept	44.04	0.43	(43.20, 44.89)	102.33	<0.001
Minimal Height	Year	−0.07	0.03	(−0.12, −0.01)	−2.46	0.014
Cephalic Index	Intercept	58.18	0.47	(57.26, 59.11)	123.63	<0.001
Cephalic Index	Year	0.17	0.03	(0.16, 0.23)	5.83	<0.001

Legend: Weighted linear regression model results with the maximal height, minimal height and cephalic index of the breeds (n = 204) in Australian National Kennel Council (ANKC) as outcome variables, year (1986 – 2013) as the predictor and numbers of registered dogs each breed each year in ANKC as weights over the 28 years
^a95 % CI: 95 % confidence interval

ISSN: 2662-9380