Table 1 Results of logistic regression analyses on the association between different environmental factors and the response variables. P values are controlled for false discovery rate. N = 5726 (personality trait analyses), N = 4925 (wool sucking analysis), N = 5683 (excessive grooming analysis), N = 5550 (owner-evaluated behaviour problem analysis).

Variable	Aggression to family members		Aggression to strangers		Aggression to cats		Shyness to strangers		Contact		DF
Variable	χ²	P value	χ²	P value	χ²	P value	χ²	P value	χ²	P value	DF
Weaning age	17.62	0.042	26.6	0.003	19.02	0.028	5.22	0.700	10.64	0.238	7
Sex	0.95	0.466	7.74	0.021	14.17	0.001	6.37	0.027	49.32	0.0005	1
Age	0.21	0.749	13.02	0.002	63.22	0.001	19.04	0.0004	42.52	0.0005	1
Hormonal status	6.03	0.042	5.54	0.057	40.43	0.001	49.11	0.0004	4.71	0.061	1
Breed	110.96	0.001	117.44	0.001	104.12	0.001	196.65	0.0004	146.68	0.0005	18
Access to outdoors			25.92	0.001	25.94	0.001					5
Other cats	69.42	0.001	18.47	0.001	37.16	0.001	4.77	0.057	7.20	0.019	1
Shyness			4.93	0.078	27.17	0.001			269.71	0.0005	1
Extraversion	4.87	0.073					78.62	0.0004			1
	Shyness to novel objects		Wool sucking		Excessive grooming		Owner-evaluated behaviour problem
Variable	χ ²	P value	χ ²	P value	χ ²	P value	χ ²	P value	DF
Weaning age	8.39	0.401	24.4	0.005	16.08	0.102	18.96	0.071	7
Sex	0.13	0.783	1.18	0.401	0.12	0.841	0.05	0.897	1
Age	18.65	0.0004	20.29	0.001	4.89	0.107	23.34	0.004	1
Hormonal status	63.99	0.0004							1
Breed	171.94	0.0004	103.39	0.001	43.63	0.027	43.24	0.018	18
Access to outdoors	26.57	0.0004	57.09	0.001	19.49	0.037			5
Other cats	12.47	0.001					4.34	0.159	1
Shyness			39.59	0.001	31.96	0.01	42.55	0.004	1
Extraversion	42.47	0.0004	15.45	0.001	5.03	0.105			1
Aggression			14.52	0.001	26.61	0.01	129.57	0.004	1
Stereotypic behaviour							43.97	0.004	1

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